作者： Cong, Ning;Han, Yongqi;Tan, Lingjun;Zhai, Conghui;Chen, Hanruo;...

期刊： Journal of Electroanalytical Chemistry,2021年881:114955 ISSN：1572-6657

通讯作者： Yuchan Zhu<&wdkj&>Zhandong Ren

作者机构： [Chen, Hanruo; Zhu, Yuchan; Tan, Lingjun; Zhou, Xiaorong; Cong, Ning; Han, Yongqi; Zhai, Conghui; Han, Juanjuan; Fang, Hua; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Yuchan Zhu; Zhandong Ren] S;School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China

关键词： Catalysts;Electrochemical electrodes;Electronic structure;Hydrogen production;Scanning electron microscopy;Spectrometers;Transmission electron microscopy;Bi-functional catalysts;Electrochemical surface area;Intrinsic activities;Physical characterization;Renewable hydrogens;Structure modification;X ray fluorescence;X ray photoelectron spectrometers;Ruthenium compounds

摘要： With the demand of renewable hydrogen energy, electrocatalytic water splitting is considered as the most promising method for hydrogen production. Herein, a simple synthesis of the nanoporous RuO2 (NP-RuO2) characterized by RuO(OH)2 surface phase was reported. The physical characterization of the materials are achieved by transmission electron microscope (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray fluorescence (XRF) and X-ray photoelectron spectrometer (XPS). For HER activity, the NP-RuO2–450 electrode only needs 87 mV overpotential to obtain a current density of 10 mA cm−2, while RuO2 generates the same current density at a relatively large overpotential (η = 142 mV). Notably, the HER activity of NP-RuO2–450 is also higher than that of Pt (10 mA cm−2, η = 103 mV). The specific activity of NP-RuO2–450 is still 2.4 times higher than that of RuO2 reflecting the enhancement of the intrinsic activity. The OER activity of NP-RuO2–450 electrode has outperformed that of RuO2. The apparent activity of NP-RuO2–450 is 3.5 times that of RuO2 at an overpotential of 270 mV. For the specific activity, NP-RuO2–450 is still 1.9 times higher than that of RuO2. Therefore, NP-RuO2–450 electrode could be used as a bifunctional catalyst for overall water splitting. The excellent HER and OER activities of the NP-RuO2–450 electrode could be attributed to the enhancement of electrochemical surface area of electrode material. However, the more important reason is that the new surface phase creation of hydroxides and the electronic structure modification of Ru. © 2020 Elsevier B.V.

语种： 英文

作者： Chen, Hanruo;Yuan, Min;Zhai, Conghui;Tan, Lingjun;Cong, Ning;...

期刊： ACS Applied Energy Materials,2020年3(9):8969-8977 ISSN：2574-0962

通讯作者： Ren, Zhandong;Zhu, Yuchan

作者机构： [Chen, Hanruo; Yuan, Min; Zhu, Yuchan; Ren, Zhandong; Zhu, YC; Tan, Lingjun; Zhou, Xiaorong; Zhai, Conghui; Cong, Ning; Han, Juanjuan; Fang, Hua] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Ren, ZD; Zhu, YC] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： hydrogen evolution reaction;PdFe alloy;nanoassembled film;electronic structure;surface morphology

摘要： A series of nano PdFe alloy film electrodes with different ratios were prepared by high-vacuum magnetron sputtering under the action of high-strength magnetic field. Among them, the Pd3Fe alloy film electrode possesses the best hydrogen evolution activity, which significantly changes the properties of hydrogen adsorption (Had) and absorption (Habs) of Pd. Pd3Fe is a nanoassembled film, which consists of many tiny nanosheets connected together. The electrochemical surface area of Pd3Fe electrode is 13 and 7 times that of the Pd/C and Pd electrode, respectively. At the same time, Pd and Fe had formed an alloy structure. The (111) plane of the Pd3Fe alloy is an obvious positive shift, and the crystal cell is compressed. The electron is transferred from Fe to Pd through XPS analysis, which has proven the electronic relationship between Pd and Fe. DFT calculations have also shown that the ΔGH* of the Pd3Fe surface is significantly reduced compared to that of Pd. Reducing the desorption energy of H on the Pd surface is beneficial to improve the electrocatalytic performance. It is noteworthy that the HER activity of Pd3Fe electrode has exceeded that of Pd/C, Pd, and Pt/C in both 0.5 M H2SO4 and 1.0 M KOH. The HER activity of Pd3Fe electrode is 20, 1.9, and 3.1 times that of Pd/C, Pd, and Pt/C in 1.0 M KOH at -0.2 V. In 0.5 M H2SO4, the HER activity of the Pd3Fe electrode is 6, 3.5, and 1.6 times that of Pd/C, Pd, and Pt/C. The Pd3Fe film electrode has the most favorable reaction kinetics, with Tafel slopes of 44.7 and 38.7 mV dec-1 in acidic and alkaline solutions, respectively. The values of the Tafel slope indicate that the mechanism of HER on the Pd3Fe film electrode is consistent with the Volmer-Heyrovsky pathway, and the Heyrovsky step is a rate-determining step. In this paper, the Pd alloy electrode has exceeded the commercial Pt/C in both acidic and alkaline solutions, which makes it more practical. Copyright © 2020 American Chemical Society.

语种： 英文

作者： Han, Juanjuan*;Lin, Bencai;Peng, Hanqing;Zhu, Yuchan;Ren, Zhandong*;...

期刊： Journal of Power Sources,2020年459(May 31):227838 ISSN：0378-7753

通讯作者： Han, Juanjuan;Ren, Zhandong

作者机构： [Zhu, Yuchan; Han, Juanjuan; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.;[Lin, Bencai] Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolat Sci & E, Sch Mat Sci & Engn, Changzhou 213164, Peoples R China.;[Peng, Hanqing; Zhuang, Lin; Xiao, Li] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Electrochem Power Sources, Wuhan 430072, Peoples R China.

通讯机构： [Han, JJ; Ren, ZD] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： Alkalinity;Ammonia;Chemical stability;Crosslinking;Economic and social effects;Ion exchange;Ion exchange membranes;Ionic strength;Microphase separation;Sodium hydroxide;Tensile strength;Tensile testing;Anion exchange membrane;Cross-linked networks;Hydroxide conductivities;Ionic cross linking;Micromorphologies;Peak power densities;Stability tests;Strength and elongations;Alkaline fuel cells

摘要： In order to achieve a better trade-off among ionic conductivity, mechanical strength and chemical stability, a series of novel aggregated and ionic cross-linked anion exchange membranes (AEMs) are recommended, namely, acS(6)QAPSF, acS(8)QAPSF and acS(10)QAPSF. Cross-linked network shoulders the responsibility to toughen the acS(x)QAPSF. Appropriate micro-morphology is responsible for facilitating the conduction of OH- and improving the alkaline stability of the acS(x)QAPSF. Compared with the original QAPSF, acS(x)QAPSF membranes exhibit much better properties. Specifically, for acS(8)QAPSF, a high OH- conductivity of 90.5 mS cm(-1) is achieved at 80 degrees C, with the swelling degree of 10.0%. The tensile strength and elongation at break of wet acS(8)QAPSF at 25 degrees C are 23.9 Mpa and 21.1%, respectively. After testing in 1 M NaOH at 80 degrees C for 30 days, the weight loss of acS(8)QAPSF is 8.0%, with the losses of tensile strength and elongation at break of 13.8% and 13.3%, respectively. Its IEC and IC retentions are 92.0% and 90.5%, respectively. For acS(8)QAPSF, a fuel cell peak power density of 0.612 W cm(-2) is obtained at 60 degrees C. While for QAPSF, its fuel cell peak power density is only 0.101 W cm(-2), and the film is cracked after the 30 days stability test.

语种： 英文

作者： Zhai, Conghui;Ming, Ruoxi;Chen, Hanruo;Tan, Lingjun;Cong, Ning;...

期刊： Chemical Communications,2020年56(95):15028-15031 ISSN：1359-7345

通讯作者： Ren, Zhandong;Zhu, Yuchan

作者机构： [Chen, Hanruo; Zhu, Yuchan; Ming, Ruoxi; Ren, Zhandong; Zhu, YC; Tan, Lingjun; Zhou, Xiaorong; Zhai, Conghui; Cong, Ning; Han, Juanjuan; Yang, Xiaohong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Ren, ZD; Zhu, YC] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

摘要： AuIr alloy nanoparticles were successfully prepared without using surfactants for the first time despite Au and Ir being immiscible according to phase diagrams. The lattice parameters of the AuIr alloy can be adjusted arbitrarily. The oxygen reduction reaction (ORR) activity of Au5Ir5 alloy is better than that of Au or Ir, and the oxygen evolution reaction (OER) activity of the Au5Ir5 alloy is as good as that of Ir in alkaline solution.

语种： 英文

作者： Deng, Li;Liu, Yi;Zhao, Gan;Chen, Jiahao;He, Shufan;...

期刊： Journal of Electroanalytical Chemistry,2019年832:459-466 ISSN：1572-6657

通讯作者： Ren, Zhandong

作者机构： [Deng, Li; He, Shufan; Zhu, Yuchan; Liu, Yi; Chai, Bo; Chen, Jiahao; Ren, Zhandong; Zhao, Gan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Ren, Zhandong] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： Chlorine;Cyclic voltammetry;Decomposition;Iridium compounds;Scanning electron microscopy;Sodium chloride;Tantalum oxides;Titanium dioxide;Viruses;Chlorine content;Chlorine evolution;Electrolyzed oxidizing water;Oxygen evolution reaction;Service lifetime;Electrochemical electrodes

摘要： Electrolyzed oxidizing water (EO water) is a new disinfectant, which has been proved to possess the high bactericidal efficiency against a wide variety of microorganisms ranging from bacteria to viruses. EO water is generated by electrolysis of an extremely dilute NaCl solution. Therefore, it is necessary to enhance the selectivity of chlorine evolution reaction (CER), which the oxygen evolution side reaction (OER) needs to be minimized. In the present study, the TiO2 doped IrO2-Ta2O5 (IrO2-Ta2O5-TiO2) electrode was prepared by the thermal decomposition method. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray fluorescence (XRF) characterizations were employed to study the performances the IrO2-Ta2O5-TiO2 electrode. The electrochemical behaviors and actives of the IrO2-Ta2O5-TiO2 electrode coupled with the IrO2-Ta2O5 electrode was investigated using cyclic voltammetry (CV) and linear sweep voltammetry (LSV). Furthermore, the selectivity of CER was analyzed through the potential difference between the CER and OER at a constant current density to illustrate the discrepancy in available chlorine content (ACC) of two kinds of oxide electrodes in the EO water preparation. In addition, the accelerated service lifetime of the IrO2-Ta2O5-TiO2 electrode was also discussed in this article. © 2018 Elsevier B.V.

语种： 英文

作者： Wang, Ju;Zhai, Conghui;Chen, Hanruo;Cong, Ning;Tan, Lingjun;...

期刊： International Journal of Electrochemical Science,2019年14(11):10187-10197 ISSN：1452-3981

通讯作者： Zhu, Yuchan

作者机构： [Chen, Hanruo; Zhu, Yuchan; Wang, Ju; Tan, Lingjun; Zhou, Xiaorong; Zhai, Conghui; Cong, Ning; Fang, Hua; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Zhu, Yuchan] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： Chlorine evolution reaction;Ru-RuO2;ordered structure;electronic structure

摘要： Chlorine evolution reaction (CER) is a very important electrochemical reaction process in modern electrochemical industry. To develop an efficient CER electrode, not only the active components but also the morphology of the electrode should be considered. In this work, the ordered spherical Ru-RuO2 electrode was prepared by hydrothermal reaction for improving the CER activity. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and X-ray diffraction (XRD) characterizations were employed to analyze the electrode structures. Compared with RuO2 electrode prepared by Adams method, the CER activity of Ru-RuO2 electrode is obviously improved. The improvement of activity should be attributed to the change of electronic structure and the ordered structure of electrode surface. The prepared Ru-RuO2 particles are spherical and evenly distributed, thus showing an orderly morphology. Such an unified structure can be conducive to the diffusion of Cl2. The diffraction peak of (101) crystal plane of Ru-RuO2 electrode has slightly positive shifted of 0.4°. It indicates that the lattice of RuO2 on the outside surface of Ru-RuO2 has been compressed to a certain extent, which may reduce the adsorption energy of Cl and accelerate the rate of chlorine desorption process. © 2019 The Authors. Published by ESG. All Rights Reserved.

语种： 英文

作者： Ren, Zhandong*;Han, Yongqi;Cong, Ning;Jin, Lingzhi;Tan, Lingjun;...

期刊： Journal of Electroanalytical Chemistry,2019年848:113320 ISSN：1572-6657

通讯作者： Ren, Zhandong;Zhu, Yuchan

作者机构： [Jin, Lingzhi; Chen, Hanruo; Zhu, Yuchan; Ren, Zhandong; Zhu, YC; Tan, Lingjun; Zhou, Xiaorong; Han, Yongqi; Cong, Ning; Zhai, Conghui; Fang, Hua] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Ren, ZD; Zhu, YC] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： Crystal structure;Cyclic voltammetry;Electrocatalysts;Electrochemical impedance spectroscopy;Electronic states;Gas adsorption;Hydrogen production;Morphology;Nanocatalysts;Renewable energy resources;Ruthenium;Scanning electron microscopy;Spheres;X ray photoelectron spectroscopy;Electrochemical decomposition;Electrochemical desorption;Electrochemical surface area;Exchange current densities;Hydrogen evolution reactions;Hydrothermal methods;Hydrothermal temperature;Spherical structures;Hydrothermal synthesis

摘要： Hydrogen is an important renewable energy source. Electrochemical decomposition of water for hydrogen production has attracted more and more attention as an appealing hydrogen production strategy. Previous studies have proved that controlling the morphology of Ru can improve hydrogen evolution reaction (HER) activity. Therefore, the preparation of ordered spherical ruthenium nanocatalysts by hydrothermal method (Ru-HT) is described in this paper. The morphology, crystal structure and electronic state of Ru-HT were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). At the same time, the electrochemical properties and surface charge were studied and analyzed by cyclic voltammetry (CV) characterization and electrochemical impedance spectroscopy (EIS). The experimental results have demonstrated that the HER activity of Ru-HT is obviously better than that of Ru by liquid phase reduction method (Ru-LR). When HER current density reaches 10 mA cm−2, the overpotential of Ru-LR electrocatalyst is 88.8 mV, while the overpotential of Ru-HT electrocatalyst is reduced to 55.7 mV in acidic medium. The Tafel slope of Ru-HT is only 36.5 mV dec−1 and the exchange current density is 0.44 mA cm−2, which indicates the rate determining step of the HER process should be the electrochemical desorption step (Heyrovsky step). By adjusting hydrothermal time and hydrothermal temperature, HER activity was further optimized. During the optimization process, the preparation conditions would change the hydrogen adsorption intensity on Ru surface to some extent. The adsorption strength of Ru–H, together with the electrochemical surface area, will affect the HER activity of Ru. © 2019 Elsevier B.V.

语种： 英文

作者： Song, Xiang;Zhao, Hui;Fang, Keneng;Lou, Yongshan;Liu, Zongkui;...

期刊： RSC Advances,2019年9(6):3113-3119 ISSN：2046-2069

通讯作者： Ren, Zhandong;Zhu, Yuchan

作者机构： [Liu, Chifeng; Zhu, Yuchan; Song, Xiang; Lou, Yongshan; Ren, Zhandong; Zhu, YC; Zhao, Hui; Zhou, Xiaorong; Liu, Zongkui; Fang, Hua; Fang, Keneng] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Ren, ZD; Zhu, YC] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

摘要： Electrolyzed oxidizing water (EOW) can be divided into acidic electrolyzed oxidizing water (AEOW) and slightly acidic electrolyzed water (SAEW). AEOW has the characteristics of low pH (pH < 2.7) and high oxidation-reduction potential (ORP > 1100 mV). SAEW is slightly acidic (pH = 5-6) and has an ORP of 700-900 mV. AEOW and SAEW both have a certain amount of active chlorine content (ACC), so they have the characteristics of broad spectrum, rapidity and high efficiency of sterilization. At present, there is little systematic research on AEOW and SAEW preparation. However, it is very important to study the preparation process, including electrode material and electrolytic process. First, the effects of Pt electrodes with different thermal decomposition temperatures on AEOW's pH, ORP and ACC values were investigated in detail. Next, for the SAEW preparation, the process is based on the preparation of AEOW by ion-exchange membrane electrolysis, reasonably mixing the electrolyzed cathode and anode solution. The effects of technological conditions such as electrolysis time, current density and electrolyte concentration have been systematically studied, and it is expected to get SAEW with a pH value slightly less than 7, a higher ORP value and a certain amount of ACC. © 2019 The Royal Society of Chemistry.

语种： 英文

作者： Ren, Zhandong*;Jin, Lingzhi;Deng, Li;Ming, Ruoxi;Zhang, Ailian;...

期刊： Sustainable Energy & Fuels,2019年3(9):2321-2328 ISSN：2398-4902

通讯作者： Ren, Zhandong;Zhu, Yuchan

作者机构： [Jin, Lingzhi; Deng, Li; Zhu, Yuchan; Ming, Ruoxi; Ren, Zhandong; Zhu, YC; Zhou, Xiaorong; Chai, Bo; Zhang, Ailian] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Ren, ZD; Zhu, YC] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

摘要： With increasing demands for clean and renewable energy, electrocatalytic water splitting is considered as the most promising procedure of hydrogen production. Pt is the best catalyst for the hydrogen evolution reaction (HER). However, the low oxygen evolution reaction (OER) activity of Pt prevents it from becoming a bifunctional catalyst in practical application. Ir-based electrocatalysts with good OER activities are expected to become the most promising bifunctional catalysts once their HER activities are improved. Herein, we report a simple synthesis of a Si-doped Ir electrode using magnetron sputtering. The physical and electrochemical characterization of the materials is achieved by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray fluorescence (XRF), X-ray diffraction (XRD) and X-ray photoelectron spectrometry (XPS). The electrochemical catalytic activity of the Si-doped Ir electrode toward the HER is demonstrated for the first time. Cyclic voltammetry (CV) curves reveal that the addition of Si can improve the utilization rate of Ir and result in a large electrochemical surface area (ESA). The overpotential of the Si-doped Ir electrode for the HER (eta = 114 mV, 50 mA cm(-2)) is obviously lower than that of an Ir electrode (eta = 148 mV, 50 mA cm(-2)) and very close to that of a Pt electrode (eta = 106 mV, 50 mA cm(-2)). The mass specific activity of the Si-doped Ir electrode exceeds that of an Ir electrode by a factor of ca. 2 at an overpotential of eta = 200 mV. The superior HER activity of the Si-doped Ir electrode could be attributed to the electronic structure modification of Ir by the interaction effect with Si as studied through XPS analysis. Moreover, the Tafel slope of 36.5 mV dec(-1) suggests that the mechanism for the Si-doped Ir electrode-catalyzed HER is Volmer-Tafel, in which the recombination of two adsorbed hydrogen atoms is the rate-determining step. In addition, the OER activity of the Si-doped Ir electrode outperforms that of an Ir electrode, which enables the Si-doped Ir electrode to be used as a bifunctional catalyst for overall water electrolysis.

语种： 英文

作者： Han, Juanjuan*;Peng, Yanqiu;Lin, Bencai;Zhu, Yuchan;Ren, Zhandong*;...

期刊： ACS Applied Energy Materials,2019年2(11):8052-8059 ISSN：2574-0962

通讯作者： Han, Juanjuan;Ren, Zhandong

作者机构： [Zhu, Yuchan; Han, Juanjuan; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.;[Peng, Yanqiu; Zhuang, Lin; Xiao, Li] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Electrochem Power Sources, Wuhan 430072, Hubei, Peoples R China.;[Lin, Bencai] Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolat Sci & E, Sch Mat Sci & Engn, Changzhou 213164, Peoples R China.

通讯机构： [Han, JJ; Ren, ZD] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： alkaline stability;hydrophobic side-chain;microphase separation;polyarylether-based backbone;anion exchange membrane

摘要： In order to improve the alkaline stability of polyarylether-based anion exchange membranes (AEMs), the strategy of attaching a hydrophobic side-chain to the backbone is proposed. A series of AEMs which include three original quaternary ammonia AEMs (QAPSF, QAPPSU, and QAPPO) and three hydrophobic side-chain attached AEMs (sQAPSF, sQAPPSU, and sQAPPO) are synthesized. Although a gradual enhancement of chemical stabilities for QAPSF, QAPPSU, and QAPPO is observed by reducing backbone polar groups, degradation of the original QA-type AEMs is still obvious. After testing in 1 M N2-saturated NaOH solution at 60 °C for 30 days, the weight losses of the original QA-type AEMs exceed 29%; the IEC losses of the AEMs exceed 24%, and the IC losses of the AEMs exceed 25% (IEC, ion exchange capacity). While for s-type AEMs, due to the hydrophobic side-chains endowing the membranes with hydrophilic/hydrophobic microphase separation morphologies, the backbones are protected from OH- attacking; significant improvements of the AEMs' chemical stabilities are achieved. After the 30 day test, the side-chain attached AEMs exhibit much higher stabilities than those of original AEMs. The weight loss percentages for sQAPSF (IEC = 1.02 mmol g-1), sQAPPSU (IEC = 1.05 mmol g-1), and sQAPPO (IEC = 2.52 mmol g-1) are 8%, 8%, and 10%, respectively. The IECs of sQAPSF, sQAPPSU, and sQAPPO are reduced by 12%, 10%, and 15%, respectively. The ionic conductivities of the membranes are reduced by 15%, 12%, and 8%, respectively. Besides, compared to the original AEMs, the side-chain attached AEMs show enhanced ionic conductivity and suppressed swelling behavior. The results explicitly show that the approach of introducing a hydrophobic side-chain is an effective way to elevate the chemical stabilities of polyarylether-based AEMs. © 2019 American Chemical Society.

语种： 英文

作者： Ren, Zhandong;Jin, Lingzhi;Gao, Jie;Chen, Hanruo;Zhai, Conghui;...

期刊： Chemical Communications,2019年55(84):12695-12698 ISSN：1359-7345

通讯作者： Zhu, Yuchan

作者机构： [Ren, Zhandong; Jin, Lingzhi; Gao, Jie; Chen, Hanruo; Zhai, Conghui; Tan, Lingjun; Cong, Ning; Fang, Hua; Zhou, Xiaorong; Zhu, Yuchan] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China

通讯机构： [Zhu, Yuchan] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

摘要： An obvious H-UPD for a nano AuTiO2-x composite has been found for the first time in terms of the electrochemical characteristics of the Au composite. The electronic effect between Au and TiO2 and the oxygen vacancy defect would change the adsorption energy of H and HER activity. The HER activity of the AuTiO2-x electrode is 6.44 times that of the Au electrode.

语种： 英文

作者： Ming, Ruoxi;Zhu, Yuchan;Deng, Li;Zhang, Ailian;Wang, Ju;...

期刊： NEW JOURNAL OF CHEMISTRY,2018年42(14):12143-12151 ISSN：1144-0546

通讯作者： Ren, Zhandong

作者机构： [Deng, Li; Zhu, Yuchan; Ming, Ruoxi; Wang, Ju; Chai, Bo; Zhang, Ailian; Han, Yongqi; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Ren, Zhandong] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

关键词： electrolyzed oxidizing water;iridium;oxidizing agent;platinum;ruthenium;unclassified drug;water;Article;chemical parameters;current density;electrolysis;energy consumption;heating;instrument sterilization;ion exchange;lifespan;physical parameters;priority journal;temperature

摘要： Electrolyzed oxidizing water (EO water) bactericide is an indirect electrochemical sterilization technology, which is characterized by broad-spectrum, rapid and powerful sterilization. EO water, with a certain amount of available chlorine content (ACC), is generated by electrolysis of an extremely dilute NaCl solution. It is very important to study the preparation process of EO water, including electrode material and electrolytic process. In this paper, the effect of electrode material (platinum, iridium or ruthenium) on the physical and chemical parameters of EO water was investigated first. The effect of electrode composition and roasting temperature on the ACC of EO water was rigorously analyzed. The sterilization effect of EO water produced by different electrode materials was further discussed. In addition, the accelerated service lifetime of the electrode and exchange electrode polarity electrolysis were also investigated. Next, for the electrolysis process, the effects of ion exchange membrane type, current density and electrolyte concentration on the ACC of EO water, anode current efficiency and energy consumption were also studied. Finally, the stability of EO water, that is, the influence of illumination, heating and stirring on the physical and chemical parameters of EO water, was also observed in detail. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2018.

语种： 英文

作者： 郗腾;鲁明珠;袁敏;邓力;任占冬;...

期刊： 化工新型材料,2018年46(1):207-209,213 ISSN：1006-3536

作者机构： [郗腾; 鲁明珠; 袁敏; 邓力; 任占冬; 张开诚; 朱玉婵] 武汉轻工大学化学与环境工程学院, 武汉, 430023

关键词： 酸性氧化电解水;油菜秸秆;预处理;还原糖得率

摘要： 为了提高油菜秸秆木质纤维素的能源化利用效率,研究了常压温和条件下利用氧化电解水(EOW)处理油菜秸秆的效果。研究结果表明,在处理时间3h,温度30℃,pH=2.04,EOW有效氯含量105mg/L条件下,EOW对油菜秸秆的还原糖得率达到16.88%,而对照组仅为11.35%,具有较好的处理效果。

语种： 中文

作者： 何树钒;王乐;张欢;陈家豪;任占冬;...

期刊： 中国消毒学杂志,2017年34(8):726-729 ISSN：1001-7658

作者机构： 武汉轻工大学化学与环境工程学院,湖北武汉,430023;[王乐; 任占冬; 陈家豪; 张开诚; 何树钒; 张欢; 朱玉婵] 武汉轻工大学

关键词： 微酸性电解水;板栗仁;食品保鲜;杀菌;抑菌

摘要： 目的考察微酸性电解水（SAEW）对板栗仁的杀菌抑菌作用。方法通过与常用杀菌剂进行对比,考察微酸性电解水对板栗仁的杀菌抑菌效果。考察有效氯浓度和杀菌时间等影响因素对微酸性电解水杀菌抑菌效果的影响。结果微酸性电解水具有高效的杀菌抑菌作用,明显优于Na HSO3和Na Cl O等常用杀菌剂。当SAEW有效氯含量为88.31 mg/L、杀菌时间为3 min时,对板栗仁上细菌的杀菌效率高达91.74%,杀灭对数值为1.08,杀菌后细菌含量为4.13 lg cfu/g。微酸性电解水同样表现出较好的抑菌效果。杀菌后第3 d,与对照组相比,细菌减少量为1.54 lg cfu/g;杀菌后第5 d,细菌减少量仍为1.17 lg cfu/g,比Na HSO3和Na Cl O分别提高了3.08和1.83倍。结论微酸性电解水是一种高效杀菌剂,其p H值接近中性,在食品保鲜领域有推广使用价值。

语种： 中文

作者： Zhu, Yuchan;Yuan, Min;Deng, Li;Ming, Ruoxi;Zhang, Ailian;...

期刊： RSC Advances,2017年7(3):1553-1560 ISSN：2046-2069

通讯作者： Ren, Zhandong

作者机构： [Deng, Li; Zhu, Yuchan; Yuan, Min; Ming, Ruoxi; Chai, Bo; Zhang, Ailian; Ren, Zhandong; Yang, Ming] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Ren, Zhandong] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

摘要： The development of highly active and stable electrocatalysts for the hydrogen evolution reaction (HER) is central to the area of renewable energy. Si nanocomposites exhibited high efficiency in a light-induced hydrogen evolution reaction. However, there are few reports on the experimental application of the electrochemical HER. Herein, we report a simple synthesis of an intermetallic Pt<inf>2</inf>Si electrode using magnetron sputtering (MS) synthesis. The physical and electrochemical characterization of the materials was achieved by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray fluorescence (XRF), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Herein, the electrochemical catalytic activity towards the HER of an intermetallic Pt<inf>2</inf>Si MS (IM-Pt<inf>2</inf>Si-MS) electrode is demonstrated for the first time. Cyclic voltammetry (CV) curves reveal that the H underpotential deposition (H-UPD) peaks of the IM-Pt<inf>2</inf>Si-MS electrode shift to higher potentials than those of a Pt electrode, which indicates that hydrogen is more easily adsorbed on the Pt<inf>2</inf>Si surface. Thus, the IM-Pt<inf>2</inf>Si-MS electrode exhibited a higher HER activity than that of a Pt electrode in 0.5&nbsp;M H<inf>2</inf>SO<inf>4</inf>solution through linear sweep voltammetry (LSV). This is attributed to the electronic structure modification of Pt and the synergistic effect of the Pt-Si binary alloy in the IM-Pt<inf>2</inf>Si-MS electrode. In addition, the Tafel slope of 30.5 mV dec^-1indicates that the mechanism for the Pt<inf>2</inf>Si-catalyzed HER is Volmer-Tafel, for which the combined desorption of hydrogen is the rate-limiting step. &copy;The Royal Society of Chemistry.

语种： 英文

作者： Yang, Xian;Li, Yande;Deng, Li;Li, Wenyang;Ren, Zhandong;...

期刊： RSC Advances,2017年7(33):20252-20258 ISSN：2046-2069

通讯作者： Zhu, Yuchan

作者机构： [Deng, Li; Zhu, Yuchan; Yang, Xian; Li, Yande; Li, Wenyang; Ren, Zhandong; Yang, Xiaohong; Yang, Ming] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Zhu, Yuchan] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

摘要： Water electrolysis is one of the most promising processes for a hydrogen-based economy, so the development of highly active, durable, and inexpensive catalysts for the hydrogen evolution reaction (HER) is very important. IrO<inf>2</inf>is known to be one of the most active catalysts for the oxygen evolution reaction (OER) in a PEM electrolyzer, but the HER activity of IrO<inf>2</inf>is rarely studied because of its low cathodic current compared to platinum. Herein, an IrO<inf>2</inf>-Fe<inf>2</inf>O<inf>3</inf>composite oxide was prepared by a thermal decomposition method. The physical and electrochemical characterization of the material was achieved by scanning electron microscopy (SEM), X-ray fluorescence (XRF), X-ray diffraction (XRD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Compared to that of IrO<inf>2</inf>, the CV curves of the IrO<inf>2</inf>-Fe<inf>2</inf>O<inf>3</inf>electrode reveal that hydrogen is more easily adsorbed on the surface, which would lead to the H underpotential deposition (H-UPD) redox current increasing significantly. Therefore, the IrO<inf>2</inf>-Fe<inf>2</inf>O<inf>3</inf>electrode exhibits higher HER activity than that of the IrO<inf>2</inf>electrode in 0.5 M H<inf>2</inf>SO<inf>4</inf>solution as shown by linear sweep voltammetry (LSV). It is attributed to the electronic structure modification of IrO<inf>2</inf>and synergetic effect between Ir and Fe in the IrO<inf>2</inf>-Fe<inf>2</inf>O<inf>3</inf>electrode. In addition, the Tafel slope of 36.2 mV dec^-1suggests that the mechanism for the IrO<inf>2</inf>-Fe<inf>2</inf>O<inf>3</inf>-catalyzed HER is Volmer-Heyrovsky. &copy;The Royal Society of Chemistry.

语种： 英文

作者： Yuan, Min;Zhu, Yuchan;Deng, Li;Ming, Ruoxi;Zhang, Ailian;...

期刊： NEW JOURNAL OF CHEMISTRY,2017年41(14):6152-6159 ISSN：1144-0546

通讯作者： Ren, Zhandong

作者机构： [Deng, Li; Yuan, Min; Zhu, Yuchan; Ming, Ruoxi; Chai, Bo; Zhang, Ailian; Li, Wenyang; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Ren, Zhandong] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： hydrogen;iridium;iridium oxide;titanium dioxide;unclassified drug;water;Article;catalysis;catalyst;cyclic potentiometry;decomposition;electrochemical analysis;electrochemical impedance spectroscopy;electrochemistry;electrode;electrolysis;hydrogen evolution;hysteresis;particle size;potentiometry;priority journal;scanning electron microscopy;surface area;temperature;X ray diffraction;X ray fluorescence

摘要： The development of highly active and long-term stable electrocatalysts for the hydrogen evolution reaction (HER) is very important. Because of the hysteresis phenomenon, IrO2 is rarely used as a cathode material for the HER. Herein, an IrO2-TiO2 composite oxide was prepared using the thermal decomposition method. The physical and electrochemical characterization of the materials was achieved by scanning electron microscopy (SEM), X-ray fluorescence (XRF), X-ray diffraction (XRD), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). In the process of the HER, the current of IrO2 is only 1.91 mA cm-2@-0.2 V in the first segment scan. However, at the 51, 101 and 151 segment scan, the HER current increases to 6.85, 15.7 and 18.2 mA cm-2@-0.2 V, respectively. During the activation process of IrO2, the HER current has increased ten times. Compared with the HER activity of IrO2, there is almost no hysteresis for the IrO2-TiO2 electrode. In the first segment scan, the HER current has already reached 27.9 mA cm-2@-0.2 V and further increased to 31.1, 33.1 and 35.0 mA cm-2 at the 51, 101 and 151 segment scan. The difference between them is not significant, which means that the IrO2-TiO2 electrode does not need activation. The IrO2-TiO2 electrode has exhibited a higher HER activity than the IrO2 electrode, which may be attributed to the electronic structure modification and the increase of the electrochemical area. © 2017 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

语种： 英文

作者： Chai, Bo*;Yan, Juntao;Wang, Chunlei;Ren, Zhandong;Zhu, Yuchan

期刊： Applied Surface Science,2017年391:376-383 ISSN：0169-4332

通讯作者： Chai, Bo

作者机构： [Zhu, Yuchan; Wang, Chunlei; Chai, Bo; Yan, Juntao; Ren, Zhandong] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

通讯机构： [Chai, Bo] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.

关键词： Charge carrier separation;Degradation;Phosphorus doped g-C 3 N 4;Photocatalytic activity

摘要： Phosphorus doped graphitic carbon nitride (g-C<inf>3</inf>N<inf>4</inf>) was easily synthesized using ammonium hexafluorophosphate (NH<inf>4</inf>PF<inf>6</inf>) as phosphorus source, and ammonium thiocyanate (NH<inf>4</inf>SCN) as g-C<inf>3</inf>N<inf>4</inf>precursor, through a direct thermal co-polycondensation procedure. The obtained phosphorus doped g-C<inf>3</inf>N<inf>4</inf>was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectra (FTIR), UV&ndash;vis diffuse reflectance absorption spectra (UV-DRS), photoelectrochemical measurement and photoluminescence spectra (PL). The photocatalytic activities of phosphorus doped g-C<inf>3</inf>N<inf>4</inf>samples were evaluated by degradation of Rhodamine B (RhB) solution under visible light irradiation. The results showed that the phosphorus doped g-C<inf>3</inf>N<inf>4</inf>had a superior photocatalytic activity than that of pristine g-C<inf>3</inf>N<inf>4</inf>, attributing to the phosphorus atoms substituting carbon atoms of g-C<inf>3</inf>N<inf>4</inf>frameworks to result in light harvesting enhancement and delocalized &pi;-conjugated system of this copolymer, beneficial for the increase of photocatalytic performance. The photoelectrochemical measurements also verified that the charge carrier separation efficiency was promoted by phosphorus doping g-C<inf>3</inf>N<inf>4</inf>. Moreover, the tests of radical scavengers demonstrated that the holes (h⁺) and superoxide radicals ([rad]O<inf>2</inf>^&minus;) were the main active species for the degradation of RhB. &copy;2016 Elsevier B.V.

语种： 英文

作者： 柴波;高新蕾;王婷婷;朱玉婵;杨晓鸿

期刊： 教育教学论坛,2017年(11):165-166 ISSN：1674-9324

作者机构： 武汉轻工大学 化学与环境工程学院,武汉,430023;[王婷婷; 柴波; 杨晓鸿; 高新蕾; 朱玉婵] 武汉轻工大学

关键词： PBL-LBL教学模式;材料化学;创新

摘要： 针对《材料化学》课程的特点,在课程教学中实施PBL-LBL相结合的教学模式,探讨了实施该教学模式的必要性及具体实施过程,并对PBL—LBL相结合教学模式中应注意的问题进行探索。

语种： 中文

作者： Wei, Shaonan;Shi, Liubin;Ren, Zhandong*;Zhang, Ailian;Ming, Ruoxi;...

期刊： RSC Advances,2017年7(72):45377-45384 ISSN：2046-2069

通讯作者： Ren, Zhandong;Zhu, Yuchan

作者机构： [Shi, Liubin; Wei, Shaonan; Zhu, Yuchan; Ming, Ruoxi; Ren, Zhandong; Zhu, YC; Chai, Bo; Zhang, Ailian] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

通讯机构： [Ren, ZD; Zhu, YC] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.

摘要： Electrolyzed oxidizing water (EO water) with low pH (2.2-2.7), high oxidation-reduction potential (ORP > 1100 mV), and available chlorine content (ACC) of 30-80 mg L-1 has an efficiently bactericidal activity and wide adaptability against many food-borne pathogens. EO water could be generated by electrolysis of a dilute NaCl solution in an electrolysis chamber with a Pt/Ti electrode. In this study, the Pt/Ti electrode was prepared by magnetron sputtering technique. The electrode surface has the characteristic of specific growth along the [111] direction. At the same time, the platinum electrodes prepared through thermal decomposition and electrodeposition as the control were also investigated. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to study the performances of these three types of Pt/Ti electrode. The effects of the physicochemical properties of the Pt electrodes on their electrochemical behaviors were studied. Furthermore, the values of pH, ORP, ACC, Cl- and the sterilization effect of EO water using these Pt electrodes as anode materials have been systematically discussed. In addition, the content of HClO, ClO-, O3 and dissolved oxygen in EO water using the Pt-MS electrode has also been reported in this article. © 2017 The Royal Society of Chemistry.

语种： 英文