N-doped carbon confined ternary Pt_(2)NiCo intermetallics for efficient oxygen reduction reaction  

作　　者：Chenhao Zhang Qian Zhang Yezhou Hu Hanyu Hu Junhao Yang Chang Yang Ye Zhu Zhengkai Tu Deli Wang 

机构地区：[1]Key Laboratory of Material Chemistry for Energy Conversion and Storage,Hubei Key Laboratory of Material Chemistry and Service Failure,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [2]China-EU Institute for Clean and Renewable Energy,Huazhong University of Science and Technology,Wuhan 430074,China [3]Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong 999077,China [4]School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Chinese Chemical Letters》2025年第3期432-438,共7页中国化学快报(英文版)

基　　金：supported by the National Natural Science Foundation(No.22279036);the Innovation and Talent Recruitment Base of New Energy Chemistry and Device(No.B21003).

摘　　要：Developing high performance electrocatalysts for the cathodic oxygen reduction reaction(ORR)is essential for the widespread application of fuel cells.Herein,a promising Pt_(2)NiCo atomic ordered ternary intermetallic compound with N-doped carbon layer coating(o-Pt_(2)NiCo@NC)has been synthesized via a facile method and applied in acidic ORR.The confinement effect provided by the carbon layer not only inhibits the agglomeration and sintering of intermetallic nanoparticles during high temperature process but also provides adequate protection for the nanoparticles,mitigating the aggregation,detachment and poisoning of nanoparticles during the electrochemical process.As a result,the o-Pt_(2)NiCo@NC demonstrates a mass activity(MA)and specific activity(SA)of 0.65 A/mgPt and 1.41mA/cm_(Pt) ^(2) in 0.1mol/L HClO_(4),respectively.In addition,after 30,000 potential cycles from 0.6 V to 1.0 V,the MA of o-Pt_(2)NiCo@NC shows much lower decrease than the disordered Pt_(2)NiCo alloy and Pt/C.Even cycling at high potential cycles of 1.5 V for 10,000 cycles,the MA still retains∼70%,demonstrating superior long-term durability.Furthermore,the o-Pt_(2)NiCo@NC also exhibits strong tolerance to CO,SO_(x),and PO_(x) molecules in toxicity tolerance tests.The strategy in this work provides a novel insight for the development of ORR catalysts with high catalytic activity,durability and toxicity tolerance.

关 键 词：Oxygen reduction reaction ELECTROCATALYSIS Ordered intermetallic Toxicity tolerance Carbon confinement 

分 类 号：O646[理学—物理化学]