Evaluation of A-Site Ba2+-Deficient Ba1-xCo0.4Fe0.4Zr0.1Y0.1O3-delta Oxides as Electrocatalysts for Efficient Hydrogen Evolution Reaction

Li, Xiangnan1,2; He, Liqing1; Zhong, Xiongwei1; Zhang, Jie1; Luo, Shijing1; Yi, Wendi1; Zhang, Luozheng1; Hu, Manman1; Tang, Jun1; Zhou, Xianyong1; Zhao, Xingzhong2; Xu, Baomin1

2018

10.1155/2018/1341608

SCANNING   影响因子和分区

0161-0457

1932-8745

Exploring earth-abundant and cost-effective catalysts with high activity and stability for a hydrogen evolution reaction (HER) is of great importance to practical applications of alkaline water electrolysis. Here, we report on A-site Ba2+-deficiency doping as an effective strategy to enhance the electrochemical activity of BaCo0.4Fe0.4Zr0.1Y0.1O3-delta for HER, which is related to the formation of oxygen vacancies around active Co?Fe ions. By comparison with the benchmarking Ba0.5Sr0.5Co0.8Fe0.2O3-delta, one of the most spotlighted perovskite oxides, the Ba0.95Co0.4Fe0.4Zr0.1Y0.1O3-delta oxide has lower overpotential and smaller Tafel slope. Furthermore, the Ba0.95Co0.4Fe0.4Zr0.1Y0.1O3-delta catalyst is ultrastable in an alkaline solution. The enhanced HER performance originated from the increased active atoms adjacent to oxygen vacancies on the surface of the Ba0.95Co0.4Fe0.4Zr0.1Y0.1O3-delta catalyst induced by Ba2+-deficiency doping. The low-coordinated active atoms and adjacent oxygen ions may play the role of heterojunctions that synergistically facilitate the Volmer process and thus render stimulated HER catalytic activity. The preliminary results suggest that Ba2+-deficiency doping is a feasible method to tailor the physical and electrochemical properties of perovskite, and that Ba0.95Co0.4Fe0.4Zr0.1Y0.1O3-delta is a potential catalyst for HER.

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Project - Ministry of Science and Technology of China[2016YFA0202400] ; National Key Research and Development Project - Ministry of Science and Technology of China[2016YFA0202404]

Instruments & Instrumentation ; Microscopy

Instruments & Instrumentation ; Microscopy

WOS:000445604100001

WILEY-HINDAWI

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Wuhan Univ, Dept Phys, Wuhan 430072, Hubei, Peoples R China

Li, Xiangnan,He, Liqing,Zhong, Xiongwei,et al. Evaluation of A-Site Ba2+-Deficient Ba1-xCo0.4Fe0.4Zr0.1Y0.1O3-delta Oxides as Electrocatalysts for Efficient Hydrogen Evolution Reaction[J]. SCANNING,2018.

Li, Xiangnan.,He, Liqing.,Zhong, Xiongwei.,Zhang, Jie.,Luo, Shijing.,...&Xu, Baomin.(2018).Evaluation of A-Site Ba2+-Deficient Ba1-xCo0.4Fe0.4Zr0.1Y0.1O3-delta Oxides as Electrocatalysts for Efficient Hydrogen Evolution Reaction.SCANNING.

Li, Xiangnan,et al."Evaluation of A-Site Ba2+-Deficient Ba1-xCo0.4Fe0.4Zr0.1Y0.1O3-delta Oxides as Electrocatalysts for Efficient Hydrogen Evolution Reaction".SCANNING (2018).