Issue 36, 2023

A reusable dual functional Mo2C catalyst for rapid hydrogen evolution by Mg hydrolysis

Abstract

Room-temperature hydrogen generation by Mg hydrolysis provides an economical strategy for on-site hydrogen supply with high capacity and environmentally friendly by-products. However, slow reaction kinetics hinders the upscaling of this technology. In this study, a low-cost Mo2C catalyst was ball milled with Mg to produce a Mg–Mo2C composite, which can be easily scaled up for manufacturing. The resulting composite exhibited rapid hydrolysis in seawater, generating over 851 mL g−1 hydrogen in 10 min. Moreover, Mo2C maintained a high catalytic activity after recycling, and a hydrogen yield of over 90% after five cycles. The catalytic mechanism study indicated that the micro galvanic cell and well-combined Mg–Mo2C interface formed during ball milling significantly enhanced the hydrolysis performance. Therefore, this work provides a cost-efficient and easy scale-up strategy for modifying Mg hydrolysis kinetics and opens new avenues for studying the relationship between material hydrolysis and hydrogen evolution reaction catalysts.

Graphical abstract: A reusable dual functional Mo2C catalyst for rapid hydrogen evolution by Mg hydrolysis

Supplementary files

Article information

Article type
Paper
Submitted
11 Apr 2023
Accepted
27 Jul 2023
First published
28 Jul 2023

J. Mater. Chem. A, 2023,11, 19328-19337

A reusable dual functional Mo2C catalyst for rapid hydrogen evolution by Mg hydrolysis

K. Naseem, H. Zhong, W. Jiang, M. Liu, C. Lang, K. Chen, L. Ouyang and J. Huang, J. Mater. Chem. A, 2023, 11, 19328 DOI: 10.1039/D3TA02163G

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