Interfacial Pt-N coordination for promoting oxygen reduction reaction  

作　　者：Jialin Cai Yizhe Chen Ruiwen Zhang Cheng Yuan Zeyu Jin Yongting Chen Shiming Zhang Jiujun Zhang 

机构地区：[1]Institute for Sustainable Energy/College of Sciences,Shanghai University,Shanghai 200444,China [2]School of Chemistry and Chemical Engineering,Key Laboratory of Hubei Province for Coal Conversion and New Carbon Materials,Wuhan University of Science and Technology,Wuhan 430081,China

出　　处：《Chinese Chemical Letters》2025年第2期481-485,共5页中国化学快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.22272105 and 22002110);Natural Science Foundation of Shanghai(No.23ZR1423900)。

摘　　要：Nitrogen-doping of carbon support(N-C)for platinum(Pt)nanoparticles to form Pt/N-C catalyst represents an effective strategy to promote the electrocatalysis of cathodic oxygen reduction reaction(ORR)in proton exchange membrane fuel cells.For fundamental understanding,clearly identifying the metalsupport effect on enhancement mechanisms of ORR electrocatalysis is definitely needed.In this work,the impact of Pt-support interaction via interfacial Pt-N coordination on electrocatalytic ORR activity and stability in Pt/N-C catalyst is deeply studied through structural/compositional characterizations,electrochemical measurements and theoretical DFT-calculations/AIMD-simulations.The resulting Pt/N-C catalyst exhibits a superior electrocatalytic performance compared to the commercial Pt/C catalyst in both half-cell and H_(2)-O_(2)fuel cell.Experimental and theoretical results reveal that the interfacial Pt-N coordination enables electron transfer from N-C support to Pt nanoparticles,which can weaken the adsorption strength of oxygen intermediates on Pt surface to improve ORR activity and induce the strong Pt-support interaction to enhance electrochemical stability.

关 键 词：Oxygen reduction reaction N-doped carbon PLATINUM Pt-N Theoretical calculations 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]