Journal of Materials Chemistry A
A reusable dual functional Mo2C catalyst for rapid hydrogen evolution by Mg hydrolysis
Kashif Naseem, Hao Zhong, Wenbin Jiang, Mili Liu, Chengguang Lang, Kang Chen, Liuzhang Ouyang and Jianmei Huang
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.