Interface and doping engineering of V_(2)C-MXene-based electrocatalysts for enhanced electrocatalysis of overall water splitting  

作　　者：Yousen Wu Jinlong Li Guozhe Sui Dong-Feng Chai Yue Li Dongxuan Guo Dawei Chu Kun Liang 

机构地区：[1]College of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar,China [2]College of Energy Engineering,Huanghuai University,Zhumadian,China [3]Key Laboratory of Fine Chemicals of College of Heilongjiang Province,Qiqihar University,Qiqihar,China [4]School of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao,China [5]Engineering Laboratory of Advanced Energy Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo,China [6]Qianwan Institute of CNiTECH,Ningbo,China

出　　处：《Carbon Energy》2024年第10期209-224,共16页碳能源(英文)

基　　金：NSF of China,Grant/Award Number:22205125;Youth Special Program for Innovation of Science and Technology,Grant/Award Number:QNZX202307;Program for Innovative Research Team(in Science and Technology)at the University of Henan Province(IRTSTHN)。

摘　　要：The restacking and oxidizable nature of vanadium-based carbon/nitride(V_(2)C-MXene)poses a significant challenge.Herein,tellurium(Te)-doped V_(2)C/V_(2)O_(3) electrocatalyst is constructed via mild H_(2)O_(2) oxidation and calcination treatments.Especially,this work rationally exploits the inherent easy oxidation characteristic associated with MXene to alter the interfacial information,thereby obtaining stable self-generated vanadium-based heterointerfaces.Meanwhile,the microetching effect of H_(2)O_(2) creates numerous pores to address the restacking issues.Besides,Te element doping settles the issue of awkward levels of absorption/desorption ability of intermediates.The electrocatalyst obtains an unparalleled hydrogen evolution reaction and oxygen evolution reaction with the overpotential of 83.5 and 279.8 mV at−10 and 10 mA cm^(−2),respectively.In addition,the overall water-splitting device demonstrates a low cell voltage of 1.41 V to obtain 10 mA cm^(−2).Overall,the inherent drawbacks of MXene can be turned into benefits based on the planning strategy to create these electrocatalysts with desirable reaction kinetics.

关 键 词：heterointerfaces microetching effect overall water splitting tellurium element doping V_(2)C 

分 类 号：O64[理学—物理化学]