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Journal of Materials Science & Technology 2022年第15期110卷 73-83页

作者： Zhifei Wang Jinbo Xue Yong Li Qianqian Shen Qi Li Xiaochao Zhang Xuguang Liu Husheng Jia Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of TechnologyMinistry of EducationTaiyuan 030024China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Materials Science and Engineering Southwest Jiaotong UniversityChengdu 610031China College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China

electrocatalytic reduction of Cr(Ⅵ)to less toxic Cr(Ⅲ)is deemed as a promising *** electrocatalytic reduction is always driven by a constant cathodic potential,which exhibits a repelling action to Cr(Ⅵ)oxyanions in wastewater and consequently suppresses reduction *** order to remarkably accelerate Cr(Ⅵ)electrocatalytic reduction,we applied a pulsed potential on an Fe^(2+)-NiFe LDH/NF electrode synthesized by in situ growth of Fe^(2+)-doped NiFe LDH nanosheets on Ni foam using a spontaneous redox *** anodic potential section,HCrO_(4)^(–) anions are adsorbed on the electrode surface and reduced to Cr(Ⅲ)by Fe^(2+).Then,Cr(Ⅲ)ions are desorbed from the electrode surface under coulombic *** regeneration of Fe^(2+) and direct reduction of Cr(Ⅵ)are achieved under cathodic potential *** pulsed potential can achieve complete elimination of Cr(Ⅵ)within 60 min at an initial concentration of 10 mg L^(-1),and the removal efficiency shows a 60%increase with respect to that under constant cathodic potential.

关键词： Hexavalent chromium electrocatalytic reduction Pulsed potential NiFe LDH Fe cycle

electrocatalytic reduction of nitrate using Pd-Cu modified carbon nanotube membranes

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Frontiers of Environmental Science & Engineering 2023年第4期17卷 1-11页

作者： Zhijun Liu Xi Luo Senlin Shao Xue Xia College of Life and Environmental Sciences Minzu University of ChinaBeijing 100081China School of Civil Engineering Wuhan UniversityWuhan 430072China Yangtze Ecology and Environment Co. Ltd.Wuhan 430062China

Excessive nitrate in water is harmful to the ecological environment and human *** reduction is a promising technology for nitrate ***,a Pd-Cu modified carbon nanotube membrane was fabricated with an electrodeposition method and used to reduce nitrate in a flowthrough electrochemical *** optimal potential and duration for codeposition of Pd and Cu were-0.7 V and 5 min,respectively,according to linear scan voltammetry *** membrane obtained with a Pd:Cu ratio of 1:1 exhibited a relatively high nitrate removal efficiency and N_(2)*** was almost completely reduced(~99%)by the membrane at potentials lower than-1.2 ***,-0.8 V was the optimal potential for nitrate reduction in terms of both nitrate removal efficiency and product *** nitrate removal efficiency was 56.2%,and the N_(2)selectivity was 23.8%for the Pd:Cu=1:1 membrane operated at-0.8 *** removal was enhanced under acidic conditions,while N_(2)selectivity was *** concentrations of Cl-ions and dissolved oxygen showed little effect on nitrate *** mass transfer rate constant was greatly improved by 6.6 times from 1.14×10^(-3)m/h at a membrane flux of 1 L/(m^(2)·h)to 8.71×10^(-3)m/h at a membrane flux of 15 L/(m^(2)·h),which resulted in a significant increase in the nitrate removal rate from 13.6 to 133.5 mg/(m^(2)·h).These findings show that the Pd-Cu modified CNT membrane is an efficient material for nitrate reduction.

关键词： Pd-Cu modified CNT membrane Nitrate reduction Flow-through Electrodeposition electrocatalytic reduction

Electrocatalysis of Metalloporphyrins(Ⅷ)——electrocatalytic reduction of Molecular Oxygen with Water-Soluble Cobalt (Ⅱ) Tetrakis(4-Trimethyl Ammonium Phenyl) Porphyrin Catalyst

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Chemical Research in Chinese Universities 1990年第2期6卷 102-109页

作者： Wang Zongli, Zhang Hui and Pang Daiwen (Department of Chemistry, Wuhan University , Wuhan)

Reported here is the electrocatalytic reduction of molecular oxygen in the presence of water-soluble cobalt(Ⅱ) tetrakis(4-trimethyl ammonium phenyl) porphyrin (Co(Ⅱ)TTAPP) as catalyst in solutions of various pH values. The overpotential of molecular oxygen reduction is reduced by ca. 200-400 mV in acidic and neutral solutions compared with several decades of millivolts in alkaline solutions, indicating that Co(Ⅱ)TTAPP possesses much higher catalytic activity in acidic and neutral solutions than in alkaline. H2TTAPP in solutions of various pH exhibits no significant catalytic activity for oxygen reduction. The significant difference in the electrocatalytic activity of Co(Ⅱ)TTAPP from that of H2TTAPP for oxygen reduction indicates that the electrocatalytic activity of Co(Ⅱ)TTAPP should be attributed to the central cobalt atom (Co(Ⅱ)) coordinated by N4 internal ring in Co(Ⅱ)TTAPP. The total number of electrons involved in oxygen reduction electrocatalyzed by Co (Ⅱ)TTAPP is 2, and the product of such reaction is H2O2 or HO2-in solutions of various pH. The reaction mechanism of oxygen reduction in acidic and alkaline solutions is also discussed.

关键词： Electrocatalysis Metalloporphyrins electrocatalytic reduction

Highly Selective electrocatalytic CuEDTA reduction by MoS_(2) Nanosheets for Efficient Pollutant Removal and Simultaneous Electric Power Output

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纳微快报:英文版 2023年第11期15卷 61-73页

作者： Hehe Qin Xinru Liu Xiangyun Liu Hongying Zhao Shun Mao College of Environmental Science and Engineering Biomedical Multidisciplinary Innovation Research InstituteShanghai East HospitalState Key Laboratory of Pollution Control and Resource ReuseTongji University1239 Siping RoadShanghai 200092People’s Republic of China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092People’s Republic of China Shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and EngineeringTongji University1239 Siping RoadShanghai 200092People’s Republic of China

electrocatalytic reduction of ethylenediamine tetraacetic acid copper(CuEDTA),a typical refractory heavy metal complexation pollutant,is an environmental benign method that operates at mild ***,the selective reduction of CuEDTA is still a big challenge in cathodic *** this work,we report a MoS_(2) nanosheet/graphite felt(GF)cathode,which achieves an average Faraday efficiency of 29.6%and specific removal rate(SRR)of 0.042 mol/cm^(2)/h for CuEDTA at−0.65 V vs SCE(saturated calomel electrode),both of which are much higher than those of the commonly reported electrooxidation technology-based removal ***,a proofof-concept CuEDTA/Zn battery with Zn anode and MoS_(2)/GF cathode is demonstrated,which has bifunctions of simultaneous CuEDTA removal and energy *** is one of the pioneer studies on the electrocatalytic reduction of heavy metal complex and CuEDTA/Zn battery,which brings new insights in developing efficient electrocatalytic reduction system for pollution control and energy output.

关键词： electrocatalytic reduction CuEDTA removal MoS_(2)nanosheet CuEDTA/Zn battery Faraday efficiency

Microperoxidase-11 Modified Electrode and Its electrocatalytic Activity on the reduction of O_2 and H_2O_2

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Chemical Research in Chinese Universities 2003年第1期19卷 54-58页

作者： JIANG Hui-jun GAO Ying 等 ChangchunInstituteofAppliedChemistry ChineseAcademyofSciencesChangchun130022P.R.China DepartmentofChemistry HaerbinNormaluniversityHaerbin215006P.R.China

Microperoxidase 11(MP 11) was immobilized on the surface of a silanized glass carbon electrode by means of the covalent bond with glutaraldehyde. The measurements of cyclic voltammetry demonstrated that the formal redox potential of immobilized MP 11 was -170 mV, which is significantly more positive than that of MP 11 in a solution or immobilized on the surface of electrodes prepared with other methods. This MP 11 modified electrode showed a good electrocatalytic activity and stability for the reduction of oxygen and hydrogen peroxide.

关键词： Microperoxidase 11 Modified electrode electrocatalytic reduction Oxygen Hydrogen peroxide

Efficient electroreduction of nitrate via enriched active phases on copper-cobalt oxides

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Chinese Chemical Letters 2024年第4期35卷 204-209页

作者： Ling Fang Sha Wang Shun Lu Fengjun Yin Yujie Dai Lin Chang Hong Liu Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China University of Chinese Academy of Sciences Beijing 100049China

Electrochemical conversion of nitrate(NO_(3)~-) to ammonia(NH_(3)) can target two birds with one stone well, in NO_(3)^(-)-containing sewage remediation and sustainable NH_(3) production. However, single metalbased catalysts are difficult to drive high-efficient NO_(3)~- removal due to the multi-electron transfer ***, we present a tandem catalyst with simple structure, Cu-Co binary metal oxides(Cu-Co-O), by engineering intermediate phases as catalytic active species for NO_(3)~- conversion. Electrochemical evaluation,X-ray photoelectron spectroscopy, and in situ Raman spectra together suggest that the newly-generated Cu-based phases was prone to NO_(3)~- to NO_(2)~- conversion, then NO_(2)~- was reduced to NH_(3) on Co-based species. At an applied potential of -1.1 V vs. saturated calomel electrode, the Cu-Co-O catalyst achieved NO_(3)~- -N removal of 90% and NH_(3) faradaic efficiency of 81% for 120 min in 100 m L of 50 mg/L NO_(3)~- -N,consuming only 0.69 k Wh/mol in a two-electrode system. This study provides a facile and efficient engineering strategy for developing high-performance catalysts for electrocatalytic nitrate conversion.

关键词： NO_(3)^(-)-containing sewage remediation electrocatalytic reduction Copper-cobalt oxides Tandem reactivity Enriched active phases

Inorganic-Organic Hybrid 18-Molybdodiphosphate Nanoparticles Bulk-modified Carbon Paste Electrode and Its Electrocatalysis

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Chinese Journal of Chemistry 2002年第8期20卷 777-783页

作者：王秀丽康振辉王恩波胡长文 Department of Chemistry Northeast Normal University Changchun Jilin 130024 China

A kind of inorganic organic hybrid 18 molybdodiphosphate nanoparticles ([(C 4H 9) 4N] 6P 2Mo 18 O 62 ·4H 2O) was firstly used as a bulk modifier to fabricate a three dimensional chemically modified carbon paste electrode (CPE) by direct mixing. The electrochemical behavior of the solid nanoparticles dispersed in the CPE in acidic aqueous solution was characterized by cyclic and square wave voltammetry. The hybrid 18 molybdodiphosphate nanoparticles bulk modified CPE (MNP CPE) displayed a high electrocatalytic activity towards the reduction of nitrite, bromate and hydrogen peroxide. The remarkable advantages of the MNP CPE over the traditional polyoxometalates modified electrodes are their excellent reproducibility of surface renewal and high stability owing to the insolubility of the hybrid 18 molybdodiphosphate nanoparticles.

关键词： molybdodiphosphate nanoparticles inorganic organic hybrid chemically modified carbon paste electrode electrochemical behavior electrocatalytic reduction

Assembly and Electrochemical Study of Transition Metal Substituted Polyoxometalates SiW_(11)NiO_(39)^(6-) and SiW_(11)MnO_(39)^(6-) on 4-Aminothio-phenol Modified Glassy Carbon Electrode

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Chemical Research in Chinese Universities 2005年第4期21卷 401-405页

作者： LüGui-qin DUJin-yan HUChang-wen InstituteforChemicalPhysics DepartmentofChemistryBeijingInstituteofTechnologyBeijing100081P.R.China InstituteforChemicalPhysics DepartmentofChemistryBeijingInstituteofTechnologyBeijing100081P.R.China／／ChemistryDepartmentAnhuiNormalUniversityWuhu241000P.R.China

Via layer-by-layer assembly, the polyoxometalates of Keggin type, SiW_ 11O_ 39Ni(H_2O) 6-(SiNiW_ 11) and {SiW_ 11O_ 39Mn(H_2O) 6-}(SiMnW_ 11) were first immobilized on a 4-aminothiophenol(4-ATP) modified glassy carbon electrode surface. The electrochemical behavior of these polyoxometalates was investigated. They exhibited some special properties in the films, which are different from those in a homogeneous aqueous solution. Their reaction mechanism in a multilayer film is proposed. The electrocatalytic behavior of these multilayer film electrodes for the reduction of BrO-_3 and NO-_2 were comparatively studied.

关键词： Polyoxometalate Layer-by-layer assembly Electrochemical behavior electrocatalytic reduction BrO_3^- NO_2^-

Introduction and Application of Electrochemical Sensors Based on Screen-Printed Technology

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Chemical Research in Chinese Universities 2001年第Z1期17卷 42-页

作者： ZEN Jyh-Myng Department of Chemistry National Chung-Hsing University

We report here the development of chemical sensors based on screen-printed technology in our research group to solve major analytical problems in environmental and clinical aspects. The purpose of the research is aimed at the enhancement of selectivity and sensitivity for analysis and monitoring of pollutants and analytes using novel chenically modified screen-printed electrodes. For example, an enzyme reactor coupled with a copper-plated screen-printed carbon electrode (CuSPE) was developed for glucose sensing. The electrocatalytic reduction of enzymatically produced H2O2 at the CuSPE was determined by flow injection analysis (FIA) in pH 7.4 PBS. The proposed method was applied to determine glucose content in fruit juice and clinical sample and satisfactory results with good recoveries were obtained. A thoroughly kinetics and mechanism study was also done for those systems that are verified in analytical applications.

关键词： electrocatalytic reduction flow injection analysis mechanism study fruit juice