journal article·2019-01-28

One-Pot Synthesis of Co-Doped VSe2 Nanosheets for Enhanced Hydrogen Evolution Reaction

Qing Zhu, Mengmeng Shao, Shu Hearn Yu, Xina Wang, Zhe Tang, Bin Chen, Hua Cheng, Zhouguang Lu, Daniel Chua, Hui Pan

ACS Applied Energy Materials· Volume 2· Issue 1
Publisher page

Abstract

We report a simple one-step hydrothermal method to fabricate cobalt (Co)-doped vanadium diselenide (VSe2) nanosheets on a carbon cloth for the hydrogen evolution reaction (HER) in acid solution. We find that the Co-doped VSe2 shows significantly enhanced catalytic activity compared with the pristine VSe2, including a low overpotential of 230 mV at 10 mA/cm2, a small Tafel slope of 63.4 mV/dec, and high stability. Our density functional theory calculations show that Co dopants dramatically reduce the Gibbs free energy for hydrogen adsorption (ΔGH), leading to improved catalytic activity for hydrogen evolution. Moreover, the Co doping promotes electron transfer and HER kinetics. Our results provide a valuable route to improve the catalytic performance of metal diselenide in HER.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Applied Physics and Materials Engineering, University of Macau, Macao SAR 999078, P. R. China

Department of Materials Science and Engineering, National University of Singapore, Singapore 117573

Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Faculty of Physics and Electronic Science, Hubei University, Wuhan 430062, People’s Republic of China

Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, P. R. China

Department of Materials Science and Engineering, Shenzhen Key Laboratory of Hydrogen Energy, Southern University of Science and Technology, Shengzhen 518055, Guangdong, P. R. China

Funding

Fundo para o Desenvolvimento das Ci?ncias e da Tecnologia · National Natural Science Foundation of China · Research & Development Office, University of Macau · Natural Science Foundation of Shenzhen · Guangdong Special Support for the Science and Technology Leading Young Scientist

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