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Wang C, Lan F, He Z, Xie X, Zhao Y, Hou H, Guo L, Murugadoss V, Liu H, Shao Q, Gao Q, Ding T, Wei R, Guo Z. Iridium-Based Catalysts for Solid Polymer Electrolyte Electrocatalytic Water Splitting. CHEMSUSCHEM 2019; 12:1576-1590. [PMID: 30656828 DOI: 10.1002/cssc.201802873] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 01/15/2019] [Indexed: 05/16/2023]
Abstract
Chemical energy conversion/storage through water splitting for hydrogen production has been recognized as the ideal solution to the transient nature of renewable energy sources. Solid polymer electrolyte (SPE) water electrolysis is one of the most practical ways to produce pure H2 . Electrocatalysts are key materials in the SPE water electrolysis. At the anode side, electrode materials catalyzing the oxygen evolution reaction (OER) require specific properties. Among the reported materials, only iridium presents high activity and is more stable. In this Minireview, an application overview of single iridium metal and its oxide catalysts-binary, ternary, and multicomponent catalysts of iridium oxides and supported composite catalysts-for the OER in SPE water electrolysis is presented. Two main strategies to improve the activity of an electrocatalyst system, namely, increasing the number of active sites and the intrinsic activity of each active site, are reviewed with detailed examples. The challenges and perspectives in this field are also discussed.
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Affiliation(s)
- Chao Wang
- Advanced Energy Materials and Systems Institute, College of Materials Science and Engineering, North University of China, Taiyuan, 030051, PR China
| | - Feifei Lan
- Advanced Energy Materials and Systems Institute, College of Materials Science and Engineering, North University of China, Taiyuan, 030051, PR China
| | - Zhenfeng He
- National Demonstration Center for Experimental Chemical Engineering Comprehensive Education, School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, PR China
| | - Xiaofeng Xie
- INET, Tsinghua University, Beijing, 100084, PR China
| | - Yuhong Zhao
- Advanced Energy Materials and Systems Institute, College of Materials Science and Engineering, North University of China, Taiyuan, 030051, PR China
| | - Hua Hou
- Advanced Energy Materials and Systems Institute, College of Materials Science and Engineering, North University of China, Taiyuan, 030051, PR China
| | - Li Guo
- Advanced Energy Materials and Systems Institute, College of Materials Science and Engineering, North University of China, Taiyuan, 030051, PR China
| | - Vignesh Murugadoss
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
| | - Hu Liu
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
- Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, National Engineering Research Center, for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, PR China
| | - Qian Shao
- College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, PR China
| | - Qiang Gao
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831, USA
| | - Tao Ding
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, PR China
| | - Renbo Wei
- Research Branch of Advanced Functional Materials, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, PR China
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
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Shekarchizade H, Amini MK. Effect of Elemental Composition on the Structure, Electrochemical Properties, and Ozone Production Activity of Ti/SnO2-Sb-Ni Electrodes Prepared by Thermal Pyrolysis Method. INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY 2011. [DOI: 10.4061/2011/240837] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Ti/SnO2-Sb-Ni electrodes with various Ni- and Sb-doping levels have been prepared by dip-coating thermal pyrolysis procedure, and their simultaneous electrochemical ozone production (EOP) and oxygen evolution reaction (OER) were investigated. The effects of electrode composition on the nanostructure, morphology, electrochemical behavior, kinetic parameters, and lifetime of the electrodes were systematically studied using X-ray diffraction, scanning electron microscopy, cyclic voltammetry, linear sweep voltammetry, and chronopotentiometry. Dissolved ozone was produced in a quartz cell and its concentration was monitored by in situ UV spectrophotometry. The presence of small amounts of Ni (Ni : Sn atomic ratio of 0.2 : 100) gives valuable characteristics to the electrodes such as increasing EOP activity and service life. Higher Ni concentrations increase the electrode film resistance and decrease its capacitance, roughness factor, and service life, while increasing Sb level up to 12 atom% improves the electrode performance with respect to these parameters. Nevertheless, the Sb/Sn atomic ratio of more than 2% reduces the EOP current efficiency in favor of OER. The optimum composition of the electrode for EOP was determined to be Sb/Sn and Ni/Sn atomic ratios of 2% and 0.2%, respectively. The highest current efficiency was 48.3% in 0.1 M H2SO4solution at room temperature.
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Affiliation(s)
| | - Mohammad K. Amini
- Chemistry Department, University of Isfahan, Isfahan 81744-73441, Iran
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