Influence of 3d transition-metal substitution on the oxygen reduction reaction electrocatalysis of ternary nitrides in acid

作     者：Kevin E. Fritz Yichen Yan Jin Suntivich 

作者机构：Department of Material Science and EngineeringCornell UniversityIthacaNew York 14850USA Kavli Institute at Cornell for Nanoscale ScienceIthacaNew York 14850USA 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2019年第12卷第9期

页      面：2307-2312页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：We thank Professor Francis J.DiSalvo(Cornell)for valuable discussions and use of his laboratory facility.The work is supported by the National Science Foundation(NSF)under Grant No.CHE-1805400 This work used the Cornell Center for Materials Research Shared Facilities which were supported through the NSF Materials Research Science and Engineering Center program(DMR-1120296) 

主　　题：nitrides electrocatalysis fuel cells oxygen reduction 

摘      要：The development of non-precious,acid-stable,oxygen reduction reaction(ORR)electrocatalysts can significantly aid the commercialization of proton exchange membrane fuel cells(PEMFCs).We report a survey of the ORR electrocatalysis on 3d metal substituted(M=Mn,Fe,Co)molybdenum and tungsten nitrides in acidic *** find that molybdate catalysts are more active than tungstates,with the specific activity depending on the chemistry of the substituted 3d *** both families,more electronegative 3d metals led to higher ORR activity(i.e.,CoFeMn).We attribute this result to the ability of the more electro negative 3d metal to withdraw electro ns from the Mo-or W-based active sites,effectively oxidizing the metal centers of the *** on our observation,future nitride ORR electrocatalysts can be further optimized by oxidizing the Mo sites further by,for example,addi ng eve n more electro negative dopa nt metals or in corporati ng anion vaca ncies.