题目：Efficient ammonia borane dehydrogenation on Ni/P-Mo@Mo2C: The effect of P dopant and Mo@Mo2C heterostructure

摘要：Developing high-performance and low-cost catalyst toward room-temperature hydrolysis of ammonia borane (NH3BH3, AB) is highly desirable for chemical hydrogen storage and release, but remains a great challenge. Herein, for the first time, noble-metal-free Ni nanoparticles (NPs) anchored on P-doped Mo@Mo2C heterostructure derived from the pyrolysis of phosphomolybdic acid (PMo12) and melamine hybrid have been fabricated through a green and facile strategy. Based on the results of experimental, characterization, and theoretical calculation, it is found that the construction of Mo@MoC heterostructures combined with P doping can optimize electronic structure and particle size of active metal Ni, which is beneficial to the dissociation of H2O in the rate-determining step (RDS), thereby promoting AB hydrolysis. The resultant Ni/P-Mo@Mo2C shows extremely high catalytic activity for AB hydrolysis, giving a turnover frequency (TOF) of 222 ± 6 min−1 without any additive at 298 K, which is the most active noble-metal-free catalysts reported so far. Moreover, the TOF value of Ni/P-Mo@Mo2C for AB hydrolysis (413 ± 8 min−1) can be further greatly improved by changing the reaction media from neutral to alkaline conditions. This work provides a simple yet effective approach for designing low-cost and high-performance catalysts for efficient hydrogen evolution.

原文链接：https://doi.org/10.1016/j.cej.2025.166442