Ultrafine Pt nanoparticles decorated MoS2 nanosheets with significantly improved hydrogen evolution activity
Ultrafine Pt nanoparticles decorated MoS2 nanosheets with significantly improved hydrogen evolution activity
复制标题
DOI：
10.1016/j.electacta.2017.04.145
复制
发表时间：
2017-07-01
影响因子：
6.6
通讯作者：
Cheng, Chuanwei
中科院分区：
文献类型：
--
作者：
Ren, Weina;Zhang, Haifeng;Cheng, Chuanwei
二维MoS 2被认为是一种潜在的析氢催化剂，但其催化反应通常只发生在活性边缘而非惰性表面。在这项工作中，我们提出了一种策略，通过原子层沉积（ALD）技术装饰的惰性表面的二硫化钼纳米片与超细铂纳米粒子，以提高催化活性的二硫化钼。具有超低Pt质量负载（类似于2.2wt%）的优化的Pt/MoS 2催化剂在低起始过电位（31 mV）、小Tafel斜率（52 mV dec（1））和牢固的HER耐久性方面表现出优异的HER性能，这与商业Pt/C催化剂相当。(C)2017爱思唯尔有限公司版权所有
Two-dimensional (2D) MoS2 has been considered as a potential catalyst in hydrogen evolution reaction (HER), but its catalytic reactions usually only occur at the active edge sites rather than the inert surfaces. In this work, we propose a strategy to enhance the catalytic activity of MoS2 by decorating the inert surfaces of MoS2 nanosheets with ultrafine Pt nanoparticles through an atomic layer deposition (ALD) technique. The optimized Pt/MoS2 catalyst with ultralow Pt mass loading (similar to 2.2 wt%) presents exceptional HER performances in terms of low onset overpotential (31 mV), small Tafel slope (52 mV dec (1)) and firm HER durability, which is comparable to the commercial Pt/C catalyst. (C) 2017 Elsevier Ltd. All rights reserved.