Encapsulated FeP nanoparticles with in-situ formed P-doped graphene layers:Boosting activity in oxygen reduction reaction

作     者：Baoxia Ni Rui Chen Luming Wu Pingchuan Sun Tiehong Chen 倪保霞;陈睿;武鲁明;孙平川;陈铁红

作者机构：Institute of New Catalytic Materials ScienceSchool of Materials Science and EngineeringKey Laboratory of Advanced Energy Materials Chemistry(MOE)Nankai UniversityTianjin 300350China Key Laboratory of Functional Polymer Materials(MOE)College of ChemistryNankai UniversityTianjin 300071China 

基　　金：supported by the National Natural Science Foundation of China(21773128 21534005 and 21421001) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2021年第64卷第5期

页      码：1159-1172页

摘      要：Nonprecious metal-based oxygen reduction reaction(ORR)electrocatalysts with high efficiency in both alkaline and acidic media are being intensively studied for the purpose of replacing expensive Pt-based catalysts;however,it is still a challenge to achieve superior ORR performances,especially in acidic ***,by pyrolysis of mixed precursors of diammonium phosphate,melamine and hemin,we prepared a nanocomposite catalyst(denoted as FeP@PGL)composed of nitrogen-doped carbon nanosheets with embedded FeP nanoparticles(NPs),which were encapsulated by in-situ formed phosphorus-doped graphene *** is found that phosphorous was preferentially doped in the coating layers on FeP NPs,instead of in the carbon *** FeP@PGL catalyst exhibited excellent ORR performance,with the onset and half-wave potential up to 1.01 and 0.90 V *** reversible hydrogen electrode(RHE)in alkaline media,and0.95 and 0.81 V *** in acidic media,*** thorough microscopy and spectroscopy characterizations,the interfacial charge transfer between the encapsulated FeP NPs and P-doped graphene layers was identified,and the local work function of the catalyst surface was also reduced by the interfacial *** interfacial synergy between the encapsulated FeP and phosphorus-doped graphene layers was essential to enhance the ORR *** study not only demonstrates the promising ORR properties of the encapsulated-FeP-based nanocomposite catalyst,but also provides direct evidence of the interfacial charge transfer effect and its role in ORR process.

主 题 词：FeP encapsulation phosphorus-doped graphene layers charge transfer oxygen reduction reaction 

学科分类：0808[工学-自动化类] 081705[081705] 08[工学] 0817[工学-轻工类] 0805[工学-能源动力学] 0702[理学-物理学类] 

核心收录：

D　O　I：10.1007/s40843-020-1525-7

馆 藏 号：203102477...