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,Pt_(3)Ni alloy anchored on WO_(x) with different content of oxygen vacancies is synthesized,and the effect of unsaturated WO_(x) 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 Pt_(3)Ni and WO_(x),which can optimize the adsorption/activation of reactants,thus obtaining good ORR activity.This study uncovers the effect of unsaturated WO_(x) on ORR performance for Pt-based alloys and provides a promising strategy to design efficient and stable ORR catalysts.
基金
supported by the National Natural Science Foundation of China(22162004,21872040)
the Natural Science Foundation of Guangxi Province(2022JJD120011)
the Opening Project of Guangxi Key Laboratory of Information Materials(211025-K).
作者简介
Corresponding author:Huan Wen.E-mail address:wenhuan@gxu.edu.cn;Corresponding author:Shibin Yin.E-mail address:yinshibin@gxu.edu.cn.
