High activity and durability of carbon-supported core-shell PtPx@Pt/C catalyst for oxygen reduction reaction

作     者：Wei-Ze Li Bang-An Lu Lin Gan Na Tian Peng-Yang Zhang Wei Yan Wei-Xin Chen You-Hu Chen Zhi-You Zhou Shi-Gang Sun 李伟泽;卢帮安;干林;田娜;张朋阳;颜伟;陈玮鑫;陈友虎;周志有;孙世刚

作者机构：State Key Laboratory of Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina 

基　　金：国家重点研发项目(2020YFB1505804) 国家自然科学基金(92045302,21573183) 深圳市基础研究计划(JCYJ20170817161445322) 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2021年第42卷第12期

页      码：2173-2180页

摘      要：Alloying Pt with transition metals can significantly improve the catalytic properties for the oxygen reduction reaction(ORR).However,the application of Pt-transition metal alloys in fuel cells is largely limited by poor long-term durability because transition metals can easily *** this study,we developed a nonmetallic doping approach and prepared a P-doped Pt catalyst with excellent durability for the ***-supported core-shell nanoparticles with a P-doped Pt core and Pt shell(denoted as PtPx@Pt/C)were synthesized via heat-treatment phosphorization of commercial Pt/C,followed by acid *** analysis using electron energy loss spectroscopy and X-ray photoelectron spectroscopy clearly demonstrated that Pt was enriched in the near-surface region(approximately 1 nm)of the carbon-supported core-shell *** to P doping,the ORR specific activity and mass activity of the PtP_(1.4)@Pt/C catalyst were as high as 0.62 mA cm^(–2)and 0.31 mAμgPt–^(1),respectively,at 0.90 V,and they were enhanced by 2.8 and 2.1 times,respectively,in comparison with the Pt/C *** importantly,PtP_(1.4)@Pt/C exhibited superior stability with negligible mass activity loss(6%after 30000 potential cycles and 25%after 90000 potential cycles),while Pt/C lost 46%mass activity after 30000 potential *** high ORR activity and durability were mainly attributed to the core-shell nanostructure,the electronic structure effect,and the resistance of Pt nanoparticles against aggregation,which originated from the enhanced ability of the PtP_(1.4)@Pt to anchor to the carbon *** study provides a new approach for constructing nonmetal-doped Pt-based catalysts with excellent activity and durability for the ORR.

主 题 词：Oxygen reduction reaction Nonmetallic doping Phosphorization Core-shell nanostructure Durability 

学科分类：0808[工学-自动化类] 081705[081705] 08[工学] 0817[工学-轻工类] 

核心收录：

D　O　I：10.1016/S1872-2067(21)63901-3

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