The Role of Hydroxide Binding Energy in Alkaline Hydrogen Oxidation Reaction Kinetics on RuCr Nanosheet  

作　　者：Chaoyi Yang Yunbo Li Chuangxin Ge Wenyong Jiang Gongzhen Cheng Lin Zhuang Wei Luo 

机构地区：[1]College of Chemistry and Molecular Sciences,Wuhan University,Wuhan,Hubei 430072,China [2]Hubei Key Labon Organic and Polymeric Opto-Electronic Materials,Wuhan University,Wuhan,Hubei 430072,China

出　　处：《Chinese Journal of Chemistry》2022年第21期2495-2501,共7页中国化学（英文版）

基　　金：supported bythe National Key Research and Development program of China(2021YFB4001200,2018YFB1502302);the National Natural Science Foundation of China(21972107);the Fundamental Reseearch Funds for the Central Universities(2042022kf1179);the Natural Science Foundation of Hubei Province(2020CFA095)。

摘　　要：Unveiling the role of adsorbed hydroxide involved in the hydrogen oxidation reaction(HOR)under alkaline electrolyte is crucial for the development of advanced HOR electrocatalysts for the alkaline polymer electrolyte fuel cells(APEFCs).Herein,we report the synthesis of amorphous RuCr nanosheets with different molar ratios and their HOR performances under alkaline media.We find a volcano correlation between the Cr content in RuCr nanosheets and their alkaline HOR performance.Experimental results and density functional theory(DFT)calculation reveals that the optimized Cr content in RuCr nanosheets could lead to the optimum hydroxide binding energy(OHBE),contributes to their remarkable alkaline HOR performance with mass activity of 568.1 A·gPGM^(–1) at 50 mV,13-fold higher than that of Ru catalyst.When RuCr nanosheet is further used as the anodic electrocatalyst,a peak power density of 1.04 W·cm^(–2 )can be achieved in an APEFC.

关 键 词：Fuel cells Hydrogen oxidation reaction Hydroxide binding energy ELECTROCHEMISTRY RUTHENIUM 

分 类 号：O64[理学—物理化学]