Kinetic Study of Hydrogen Evolution Reaction over Strained MoS2 with Sulfur Vacancies Using Scanning Electrochemical Microscopy

被引：267

作者：

Li, Hong ^{[1
]}

Du, Minshu ^{[5
]}

Mleczko, Michal J. ^{[2
]}

Koh, Ai Leen ^{[3
]}

Nishi, Yoshio ^{[2
]}

Pop, Eric ^{[2
,4
]}

Bard, Alien J. ^{[5
]}

Zheng, Xiaolin ^{[1
]}

机构：

[1] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA

[3] Stanford Univ, Stanford Nano Shared Facil, Stanford, CA 94305 USA

[4] Stanford Univ, Precourt Inst Energy, Stanford, CA 94305 USA

[5] Univ Texas Austin, Dept Chem, Ctr Electrochem, Austin, TX 78712 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2016年 / 138卷 / 15期

基金：

美国国家科学基金会;

关键词：

GENERATION/TIP COLLECTION MODE; ELECTRODE-REACTION MECHANISM; ACTIVE EDGE SITES; PALLADIUM NANOPARTICLES; FEEDBACK MODE; OXIDATION; ELECTROCATALYSIS; FILMS;

D O I：

10.1021/jacs.6b01377

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Molybdenum disulfide (MoS2), with its active edge sites, is a proposed alternative to platinum for catalyzing the hydrogen evolution reaction (HER). Recently, the inert basal of was activated and optimized plane MoS2 successfully with excellent intrinsic HER activity by creating and further straining sulfur (S) vacancies. Nevertheless, little is known about the HER kinetics of those S vacancies and the additional effects from elastic tensile strain. Herein, scanning electrochemical microscopy was used to determine the HER kinetic data for both unstrained S vacancies (formal potential E-v(0) = -0.53 V-Ag/AgCl, electron-transfer coefficient alpha(v) = 0.4, electron-transfer rate constant k(v)(0) = 2.3 X 10(-4) cm/s) and strained S vacancies (E-sv(0) = -0.53 V-Ag/AgCl, alpha(sv) = 0.4, k(sv)(0) = 1.0 X 10(-3) cm/s

引用

页码：5123 / 5129

页数：7

共 36 条

[1] Scanning electrochemical microscopic study of hydrogen oxidation and evolution at electrochemically deposited Pt nanoparticulate electrode incorporated in polyaniline [J].