Direct mechanochemical synthesis of MoO2/MoC heterostructures catalysts with enhanced performance for hydrogen evolution reaction

作者：Chen, Peirong; Zhong, Hao; Ouyang, Liuzhang^*; Li, Haiwen^*

来源：International Journal of Hydrogen Energy, 2024, 51: 913-920.

DOI：10.1016/j.ijhydene.2023.07.100

• Mechanochemistry
• Molybdenum carbide
• Molybdenum oxide
• Hydrogen evolution reaction
• Electrocatalysis

Interfacial engineering is an effective approach for regulating the electronic structure of molybdenum carbides and promoting the hydrogen evolution reaction (HER). However, the development of a facile, cost-effective, and scalable synthesis method is crucial for in-dustrial applications. In this work, we developed a mechanochemical method for the preparation of a composite of MoO2/MoC with superior HER electrocatalytic performance in alkaline solutions. The MoO2/MoC composite can be easily formed by ball milling for 1 h at ambient conditions, and this process can be scaled up for large-scale industrialization. The composite construction leads to a redistribution of electrons around the interface, opti-mizing the adsorption energy and enhancing the HER performance beyond that of Pt/C catalysts. This strategy provides a new route for the simple and efficient preparation of high-activity electrocatalysts.