期刊
JOURNAL OF ENERGY CHEMISTRY
卷 45, 期 -, 页码 45-51出版社
ELSEVIER
DOI: 10.1016/j.jechem.2019.09.010
关键词
MoS2; Heterojunction; Carbon; Electrocatalyst
资金
- National Natural Science Foundation of China [31430092, 21736003]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2016A030306027, 2017A030306029]
- Guangdong Natural Science Funds [2017A030313130]
- Guangzhou science and technology funds [201904010078]
- State Key Laboratory of Pulp and Paper Engineering and Fundamental Research Funds for the Central Universities
The design and development of electrocatalysts composed of non-noble-metal catalysts with both large surface area and high electrical conductivities are crucial for the hydrogen evolution reaction (HER). Here, a xylose-based porous carbon is coupled with a MoS2-MoP heterojunction (MoS2-MoP/FPC) hybrid and used as a promising catalyst for HER. The hybrid is prepared by immobilizing petal-like MoS2 nanosheets on porous carbon (MoS2/FPC), followed by controlling the phosphidation in Ar/H-2 to form MoS2-MoP/FPC. Red phosphorus provides the P species that can induce the construction of the heterojunction under the reducing atmosphere, along with the generation of a MoP phase and the splitting of the MoS2 phase. The as-prepared MoS2-MoP/FPC catalyst offers a low overpotential of 144 mV at a current density of 10 mA cm(-2) and a small Tafel slope of 41 mV dec(-1) for the HER in acidic media, as well as remarkable stability. Apart from the active nature of the hybrid, its outstanding activity is attributed to the MoS2-MoP heterojunction, and the good charge/mass-transfer ability of porous carbon. This strategy provides a new method to develop and design low-cost and high-performance catalysts for the HER. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
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