Molybdenum Carbide-Oxide Heterostructures: In Situ Surface Reconfiguration toward Efficient Electrocatalytic Hydrogen Evolution

时间:2020-07-07作者:浏览量:40


Molybdenum Carbide-Oxide Heterostructures: In Situ Surface Reconfiguration toward Efficient Electrocatalytic Hydrogen Evolution

作者:He, LQ (He, Liuqing)[ 1 ] ; Zhang, WB (Zhang, Wenbiao)[ 1 ] ; Mo, QJ (Mo, Qijie)[ 1 ] ; Huang, WJ (Huang, Wenjie)[ 2,3 ] ; Yang, LC (Yang, Lichun)[ 2,3 ] ; Gao, QS (Gao, Qingsheng)[ 1 ]


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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION


卷: 59  期: 9  页: 3544-3548

DOI: 10.1002/anie.201914752


出版年: FEB 24 2020


在线发表日期: JAN 2020

文献类型:Article


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摘要

Heterostructured Mo2C-MoOx on carbon cloth (Mo2C-MoOx/CC), as a model of easily oxidized electrocatalysts under ambient conditions, is investigated to uncover surface reconfiguration during the hydrogen evolution reaction (HER). Raman spectroscopy combined with electrochemical tests demonstrates that the Mo-VI oxides on the surface are in situ reduced to Mo-IV, accomplishing promoted HER in acidic condition. As indicated by density functional theoretical calculations, the in situ reduced surface with terminal Mo=O moieties can effectively bring the negative Delta G(H*) on bare Mo2C close to a thermodynamic neutral value, addressing difficult H* desorption toward fast HER kinetics. The optimized Mo2C-MoOx/CC only requires a low overpotential (eta(10)) of 60 mV at -10 mA cm(-2) in 1.0 m HClO4, outperforming Mo2C/CC and most non-precious electrocatalysts. In situ surface reconfiguration are shown on W2C-WOx, highlighting the significance to boost various metal-carbides and to identify active sites.


关键词

作者关键词:heterointerfaces; hydrogen evolution reaction; in situ reconfiguration; molybdenum carbides; surface oxides


KeyWords Plus:COBALT PHOSPHIDE NANOPARTICLES; ANODE MATERIAL; ACTIVE-SITES; NANOSHEETS; INTERFACE; CATALYSTS


作者信息

通讯作者地址: Gao, QS (通讯作者)


显示更多Jinan Univ, Coll Chem & Mat Sci, Guangzhou 510632, Peoples R China.

通讯作者地址: Yang, LC (通讯作者)

显示更多South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China.

通讯作者地址: Yang, LC (通讯作者)

显示更多South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

地址:


显示更多[ 1 ]‎ Jinan Univ, Coll Chem & Mat Sci, Guangzhou 510632, Peoples R China

显示更多[ 2 ]‎ South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Peoples R China

显示更多[ 3 ]‎ South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

电子邮件地址:mslcyang@scut.edu.cn; tqsgao@jnu.edu.cn


基金资助致谢

基金资助机构显示详情授权号

National Natural Science Foundation of China


21773093

21433002

51671089

National Key Research and Development Program of China

2018YFA0209402

National Natural Science Foundation of Guangdong Province


2015A030306014

Guangzhou Science and Technology Program

201707010268

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出版商

WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY


期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Chemistry


Web of Science 类别:Chemistry, Multidisciplinary