Interfacial engineering of atomic platinum-doped molybdenum carbide quantum dots for high-rate and stable hydrogen evolution reaction in proton exchange membrane water electrolysis  

作　　者：Lulu Chen Yichao Huang Yanping Ding Ping Yu Fang Huang Wenbo Zhou Limin Wang Yangyang Jiang Haitao Li Hanqing Cai Lin Wang Hang Wang Meihong Liao Lianming Zhao Zhuangjun Fan 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,School of Materials Science and Engineering,China University of Petroleum(East China),Qingdao 266580,China [2]Shandong Saikesaisi Hydrogen Energy Co.,Ltd,Jinan 250013,China [3]School of Mechanical and Electronic Engineering,Qingdao Binhai University,Qingdao 266555,China

出　　处：《Nano Research》2023年第10期12186-12195,共10页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.22171287,21901136,51972342,51972345,22105226,and 51872056);Taishan Scholar Project of Shandong Province(Nos.tsqn202103046 and ts20190922);Natural Science Foundation of Shandong Province(Nos.ZR2022QE175 and ZR2019ZD51);Fundamental Research Funds for the Central Universities(Nos.20CX06024A,22CX01002A-1,and 21CX06002A);China Postdoctoral Science Foundation(Nos.2019M650027 and 2019TQ0169);National Natural Science Foundation of Beijing(No.2204082),and Shandong Province Postdoctoral Innovative Talent Support Program(No.SDBX20200004).

摘　　要：Platinum(Pt)-based electrocatalysts remain the only practical cathode catalysts for proton exchange membrane water electrolysis(PEMWE),due to their excellent catalytic activity for acidic hydrogen evolution reaction(HER),but are greatly limited by their low reserves and high cost.Here,we report an interfacial engineering strategy to obtain a promising low-Pt loading catalyst with atomically Pt-doped molybdenum carbide quantum dots decorated on conductive porous carbon(Pt-MoCx@C)for high-rate and stable HER in PEMWE.Benefiting from the strong interfacial interaction between Pt atoms and the ultra-small MoCx quantum dots substrate,the Pt-MoCx catalyst exhibits a high mass activity of 8.00 A·mgPt−1,5.6 times higher than that of commercial 20 wt.%Pt/C catalyst.Moreover,the strong interfacial coupling of Pt and MoCx substrate greatly improves the HER stability of the Pt-MoCx catalyst.Density functional theory studies further confirm the strong metal-support interaction on Pt-MoCx,the critical role of MoCx substrate in the stabilization of surface Pt atoms,as well as activation of MoCx substrate by Pt atoms for improving HER durability and activity.The optimized Pt-MoCx@C catalyst demonstrates>2000 h stability under a water-splitting current of 1000 mA·cm^(−2)when applied to the cathode of a PEM water electrolyzer,suggesting the potential for practical applications.

关 键 词：proton exchange membrane(PEM)water electrolysis hydrogen evolution reaction ELECTROCATALYSTS molybdenum carbides PLATINUM 

分 类 号：O64[理学—物理化学]