化学
电化学
金属
吸附
催化作用
再分配(选举)
合金
氧气
密度泛函理论
化学工程
组合化学
纳米技术
电极
计算化学
物理化学
有机化学
材料科学
工程类
政治
法学
政治学
作者
Jinli Chen,Shouquan Feng,Tianqi Yu,Yongjin Zou,Huan Wen,Shibin Yin
出处
期刊:Chinese Journal of Structural Chemistry
日期:2023-09-01
卷期号:: 100168-100168
标识
DOI:10.1016/j.cjsc.2023.100168
摘要
Tuning strong metal-support interaction between Pt-based alloys and metal oxides is an effective strategy for modulating the performance of oxygen reduction reaction (ORR). Herein, Pt3Ni alloy anchored on WOx with different content of oxygen vacancies is synthesized, and the effect of unsaturated WOx on ORR activity/stability is revealed. Electrochemical results indicate that ORR activity is positively correlated with oxygen vacancy concentration, while durability presents the opposite trend. Density functional theory (DFT) calculation results suggest that controlling the content of oxygen vacancies can usefully adjust the charge redistribution between Pt3Ni and WOx, which can optimize the adsorption/activation of reactants, thus obtaining good ORR activity. This study uncovers the effect of unsaturated WOx on ORR performance for Pt-based alloys and provides a promising strategy to design efficient and stable ORR catalysts.
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