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Molybdenum disulfide (MoS2) has garnered significant attention as a potential substitute for Pt catalysts in the hydrogen evolution reaction (HER). Furthermore, there is a need to explore cost-effective and efficient electrocatalysts that can perform well across different pH levels. In this study, a straightforward hydrothermal method is presented to synthesize Ni, Co-doped MoS2 nanosheets on carbon fiber paper (Ni, Co-MoS2/CFP) for HER in various pH environments. The findings suggest that strategic doping not only alters the structure and composition of Ni, Co-MoS2/CFP but also enhances its inherent electrocatalytic activity while facilitating the transformation of the MoS2 phase. The overpotentials observed for Ni, Co-MoS2/CFP are 95.6, 154, and 144 mV (at 10 mA cm−2) under alkaline, acidic, and neutral environments respectively. The exceptional performance of Ni, Co-MoS2/CFP in HER can be attributed to the introduction of nickel and cobalt dopants which increase porosity and expose more active sites. This one-step doping technique presents a novel approach to modulating catalytic activity across all pH ranges.


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Synthesis of Co, Ni-doped MoS2 as durable and pH-universal catalyst for hydrogen evolution

Show Author's information Ning Cao1Yiming Di1Shan Chen1Jiayi Qian1Minglei Liu2Xin Jin3Xiaobei Zang1( )
State Key Laboratory of Heavy Oil Processing, School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
China Petroleum Pipeline Engineering Co., Ltd., Langfang 065000, China
State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China

Abstract

Molybdenum disulfide (MoS2) has garnered significant attention as a potential substitute for Pt catalysts in the hydrogen evolution reaction (HER). Furthermore, there is a need to explore cost-effective and efficient electrocatalysts that can perform well across different pH levels. In this study, a straightforward hydrothermal method is presented to synthesize Ni, Co-doped MoS2 nanosheets on carbon fiber paper (Ni, Co-MoS2/CFP) for HER in various pH environments. The findings suggest that strategic doping not only alters the structure and composition of Ni, Co-MoS2/CFP but also enhances its inherent electrocatalytic activity while facilitating the transformation of the MoS2 phase. The overpotentials observed for Ni, Co-MoS2/CFP are 95.6, 154, and 144 mV (at 10 mA cm−2) under alkaline, acidic, and neutral environments respectively. The exceptional performance of Ni, Co-MoS2/CFP in HER can be attributed to the introduction of nickel and cobalt dopants which increase porosity and expose more active sites. This one-step doping technique presents a novel approach to modulating catalytic activity across all pH ranges.

Keywords: MoS2, hydrothermal method, electrocatalysts, hydrogen evolution reaction

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Received: 11 January 2024
Revised: 25 January 2024
Accepted: 26 January 2024
Published: 29 January 2024
Issue date: December 2023

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© The Author(s) 2023. Published by Tsinghua University Press.

Acknowledgements

Acknowledgements

This work was supported by the State Key Laboratory of Heavy Oil Processing (SKLHOP202101006); the Project of Marine Science and Technology Synergy Innovation Center (CXZX-04-04-29); the National Natural Science Foundation of China (22078365).

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