Engineering water dissociation sites in MoS2 nanosheets for accelerated electrocatalytic hydrogen production

被引：535
作者：
Zhang, Jian [1 ,2 ]
Wang, Tao [3 ]
Liu, Pan [4 ,5 ]
Liu, Shaohua [1 ,2 ]
Dong, Renhao [1 ,2 ]
Zhuang, Xiaodong [1 ,2 ]
Chen, Mingwei [4 ,5 ]
Feng, Xinliang [1 ,2 ]
机构：
[1] Tech Univ Dresden, Ctr Adv Elect Dresden Cfaed, D-01062 Dresden, Germany
[2] Tech Univ Dresden, Dept Chem & Food Chem, D-01062 Dresden, Germany
[3] Univ Lyon 1, Ens Lyon, CNRS, Lab Chim,UMR 5182, F-69342 Lyon, France
[4] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
[5] JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama 3320012, Japan
来源：
ENERGY & ENVIRONMENTAL SCIENCE | 2016年 / 9卷 / 09期
基金：
日本科学技术振兴机构;
关键词：
ACTIVE EDGE SITES; EVOLUTION REACTION; CATALYST;
D O I：
10.1039/c6ee01786j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Earth-abundant MoS2 is widely reported as a promising HER electrocatalyst in acidic solutions, but it exhibits extremely poor HER activities in alkaline media due to the slow water dissociation process. Here we present a combined theoretical and experimental approach to improve the sluggish HER kinetics of MoS2 electrocatalysts through engineering the water dissociation sites by doping Ni atoms into MoS2 nanosheets. The Ni sites thus introduced can effectively reduce the kinetic energy barrier of the initial water-dissociation step and facilitate the desorption of the -OH that are formed. As a result, the developed Ni-doped MoS2 nanosheets (Ni-MoS2) show an extremely low HER overpotential of similar to 98 mV at 10 mA cm(-2) in 1 M KOH aqueous solution, which is superior to those (>220 mV at 10 mA cm(-2)) of reported MoS2 electrocatalysts.
引用
收藏
页码：2789 / 2793
页数：5
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