Surface active-site engineering in hierarchical PtNi nanocatalysts for efficient triiodide reduction reaction  

作　　者：Jiabin Cui Pin Ma Weidan Li Rui Jiang Lirong Zheng Yuan Lin Chang Guo Xiong Yin Leyu Wang 

机构地区：[1]State Key Laboratory of Chemical Resource Engineering,Innovation Centre for Soft Matter Science and Engineering,College of Chemistry,Beijing University of Chemical Technology,Beijing,100029,China [2]Beijing National Laboratory for Molecular Sciences,Key Laboratory of Photochemistry,CAS Research/Education Center for Excellence in Molecular Sciences,Institute of Chemistry,Chinese Academy of Sciences,Beijing,100190,China [3]Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing,100049,China [4]Pillar of Engineering Product Development,Singapore University of Technology and Design,Singapore,487372,Singapore

出　　处：《Nano Research》2021年第12期4714-4718,共5页纳米研究（英文版）

基　　金：The research was financially supported by the National Natural Science Foundation of China(No.21771019);the National Key Research and Development Program of China(No.2018YFA0702002);the Fundamental Research Funds for the Central Universities(Nos.XK1901 and buctrc202023);P.Ma is funded by China Postdoctoral Science Foundation(No.2020M672772)。

摘　　要：Hierarchical Pt-alloys enriched with active sites are highly desirable for efficient catalysis,but their syntheses generally need time-consuming and elaborate annealing treatment at high temperature.We herein report a surface active-site engineering strategy for constructing the hierarchical PtNi nanocatalysts with an atomic Pt-skin layer(PtNi@Pt-SL)towards efficient triiodide reduction reaction(TRR)via an acid-dealloying approach.The facile acid-dealloying process promotes the formation of surface Pt active sites on the hierarchical Pt-alloys,and thus results in good catalytic performance towards TRR.Theoretical calculation reveals that the enhanced catalytic property stems from the moderate energy barriers for iodide atoms on the surface Pt active-sites.The surface active-site engineering strategy paves a new way for the design of active and durable electrocatalysts.

关 键 词：surface active-site engineering Pt skin-layer hierarchical structure DEALLOYING triiodide reduction reaction 

分 类 号：O64[理学—物理化学]