Modulating metal-support interaction between Pt3Ni and unsaturated WOx to selectively regulate the ORR performance

被引：11
|
作者：
Chen, Jinli [1 ]
Feng, Shouquan [1 ]
Yu, Tianqi [1 ]
Zou, Yongjin [2 ]
Wen, Huan [1 ]
Yin, Shibin [1 ]
机构：
[1] Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Electrochem Energy Mat, Nanning 530004, Peoples R China
[2] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Peoples R China
来源：
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY | 2023年 / 42卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Oxygen vacancies; Catalyst; Oxygen reduction reaction; Strong metal support interaction; Density functional theory calculation; OXYGEN REDUCTION; ELECTROCATALYSTS; EFFICIENCY; OXIDATION; CATALYST;
D O I：
10.1016/j.cjsc.2023.100168
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
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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页数：8
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