Magnesium-Mediated Charge Redistribution of Molybdenum Site for Enhanced Alkaline Hydrogen Production

The production of hydrogen through the electrochemical splitting of water stands out as a promising method. Molybdenum carbide (Mo2C) serves as an effective alternative to noble metal electrocatalysts for the hydrogen evolution reaction (HER). However, its application for large-scale use remains limited. This work adopts a simple one-step sintering process to introduce nonprecious metal heteroatoms (Mg) for modulating the electronic structure of molybdenum carbide (Mg–Mo2C), which effectively creates additional active sites due to the charge transfer between Mo sites and Mg dopant; thus, the kinetics of HER improves significantly. Notably, the synthesized Mg–Mo2C achieved a current density of 10 mA cm–2 with a low overpotential of 111 mV and a small Tafel slope of 68.23 mV dec–1 and demonstrated excellent stability in 1 M KOH. This research provides insights into the rational design of effective and cost-efficient electrocatalysts in energy storage and conversion applications.

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Publication Details

Journal
ACS Applied Energy Materials
Published
2024-08-22
DOI
https://doi.org/10.1021/acsaem.4c01694
Citations
4
Primary Topic
Electrocatalysts for Energy Conversion
Type
article
Field-Weighted Citation Impact
0.41

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article

Magnesium-Mediated Charge Redistribution of Molybdenum Site for Enhanced Alkaline Hydrogen Production

Dongping Wang, Koji Kajiyoshi, Yongqiang Feng, Liyun Cao et al.
4 citations
ACS Applied Energy Materials
Electrocatalysts for Energy Conversion
0.41
article

Magnesium-Mediated Charge Redistribution of Molybdenum Site for Enhanced Alkaline Hydrogen Production

Dongping Wang, Koji Kajiyoshi, Yongqiang Feng, Liyun Cao, Yijun Liu, Yintao Wei, Qingqing Liu, Jianfeng Huang, Yong Zhao, Yirong Qi, Zhenjiang Li, Ying Wang
article en
4 citations

Abstract

The production of hydrogen through the electrochemical splitting of water stands out as a promising method. Molybdenum carbide (Mo2C) serves as an effective alternative to noble metal electrocatalysts for the hydrogen evolution reaction (HER). However, its application for large-scale use remains limited. This work adopts a simple one-step sintering process to introduce nonprecious metal heteroatoms (Mg) for modulating the electronic structure of molybdenum carbide (Mg–Mo2C), which effectively creates additional active sites due to the charge transfer between Mo sites and Mg dopant; thus, the kinetics of HER improves significantly. Notably, the synthesized Mg–Mo2C achieved a current density of 10 mA cm–2 with a low overpotential of 111 mV and a small Tafel slope of 68.23 mV dec–1 and demonstrated excellent stability in 1 M KOH. This research provides insights into the rational design of effective and cost-efficient electrocatalysts in energy storage and conversion applications.

ACS Applied Energy MaterialsVol. 7(17)
Qingdao University of Science and Technology (CN), Shaanxi University of Science and Technology (CN), Kōchi University (JP)
National Natural Science Foundation of China, Xi'an Municipal Bureau of Science and Technology, Agriculture Department of Shaanxi Province, Key Research and Development Projects of Shaanxi Province
Openalex Percentile: Top 48%
Electrocatalysts for Energy Conversion
0.41
DOISourceOpenAlex
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