Single atom Ru doping 2H-MoS2 as highly efficient hydrogen evolution reaction electrocatalyst in a wide pH range

被引：201

作者：

Wang, Jing ^{[1
]}

Fang, Wenhui ^{[1
]}

Hu, Ye ^{[1
]}

Zhang, Yuhua ^{[1
]}

Dang, Jiaqi ^{[1
]}

Wu, Ying ^{[1
]}

Chen, Bozhen ^{[1
]}

Zhao, Hong ^{[1
]}

Li, Zengxi ^{[2
]}

机构：

[1] Univ Chinese Acad Sci, Sch Chem Sci, Beijing 101408, Peoples R China

[2] Univ Chinese Acad Sci, Sch Chem Engn, Beijing 101408, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2021年 / 298卷

关键词：

Molybdenum disulfide; Ruthenium; Wide pH range; Hydrogen evolution reaction; Density functional theory; ACTIVE EDGE SITES; RAY-ABSORPTION SPECTROSCOPY; UNIVERSAL ELECTROCATALYSTS; PHASE-TRANSITION; MOS2; NANOSHEETS; CATALYST; NANOPARTICLES; GRAPHENE; HYBRID; DEFECT;

D O I：

10.1016/j.apcatb.2021.120490

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

It's a huge challenge to develop a hydrogen evolution reaction (HER) catalyst with a wide pH range. Herein, single atom ruthenium-doped molybdenum disulfide with high 2H phase content (Ru@2H-MoS2) catalysts are synthesized by a two-step hydrothermal method, they are named as Ru-0.05@2H-MoS2, Ru-0.10@2H-MoS2 and Ru-0.12@2H-MoS2 based on the amount of Ru (mmol) added to 2H-MoS2. The results indicate that single atom Ru substituting for molybdenum atom leads to more active centers and some vacancies, thus improving the property of 2H-MoS2 for HER. Among them, Ru-0.10@2H-MoS2 shows the lowest HER overpotentials of 137, 51 and 168 mV at 10 mA cm-(2) in 1.0 M PBS, 1.0 M KOH and 0.5 M H2SO4, respectively. The density functional theory (DFT) further indicates that the Ru@2H-MoS2 has a lower Gibbs free energy of H-adsorption (Delta G(H)*). Therefore, this study offers an effective way to reasonably design and synthesize efficient MoS2-based catalysts in a wide pH range.

引用

页数：14

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