Molybdenum disulfide composite materials with encapsulated copper nanoparticles as hydrogen evolution catalysts

In the current work, a series of molybdenum disulfide composite MCNTs@Cu@MoS 2 materials with high hydrogen evolution performance are prepared. In the hydrogen evolution reaction, their overpotential is as low as 225 mV at a current density of 10 mA cm −2 in 1 M H 2 SO 4 as electrolyte solution. Thi...

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Bibliographic Details
Published in:RSC advances 2022-04, Vol.12 (21), p.13393-134
Main Authors: Wang, Chuangye, Zhao, Wenjing, Jiang, Huixin, Cui, Mengyu, Jin, Yu, Sun, Ruixue, Lin, Xufeng, Zhang, Longli
Format: Article
Language:English
Subjects:
Catalysts
Catalytic activity
Chemistry
Composite materials
Copper
Electrical impedance
Electrolysis
Electron transfer
Encapsulation
Hydrogen
Hydrogen evolution reactions
Molybdenum
Molybdenum disulfide
Nanoparticles
Sulfuric acid
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Summary:In the current work, a series of molybdenum disulfide composite MCNTs@Cu@MoS 2 materials with high hydrogen evolution performance are prepared. In the hydrogen evolution reaction, their overpotential is as low as 225 mV at a current density of 10 mA cm −2 in 1 M H 2 SO 4 as electrolyte solution. This excellent catalytic activity has been ascribed to its lower electrical impedance and high double layer capacitance. The encapsulation of copper nanoparticles into MoS 2 crystals significantly reduces their resistance, enhancing the electron transfer rate during water electrolysis. Thereby, the introduction of conductive nanoparticles into semi-conductive catalyst crystals would be an efficient measure to improve their electrochemical catalytic activity in the hydrogen evolution reaction. Encapsulation of copper nanoparticles by the electrochemical catalyst MoS 2 effectively improved its HER performance.
ISSN:2046-2069
2046-2069
DOI:10.1039/d2ra02012b