近日，2023级博士生龙建军在Advanced Science（综合一区，IF=14.1）发表水合肼制氢论文，题为“Light-Promoted Hydrazine Dehydrogenation over Ni/NH2-MIL-125: Unraveling Mechanisms for Efficient Hydrogen Production”。
摘要：
Developing efficient, low-cost, and durable catalysts for the complete dehydrogenation of hydrous hydrazine (N2H4·H2O) remains a significant challenge. Herein, a high-performance, visible-light-responsive Ni-loaded amino-functionalized MIL-125 (Ni/NH2-MIL-125) catalyst is fabricated via a facile chemical reduction method, which, for the first time, enables visible-light-enhanced N2H4 dehydrogenation using a non-precious metal catalyst. Under visible light irradiation, Ni/NH2-MIL-125 achieves a turnover frequency (TOF) of 220.2 h−1 at 323 K, more than twice that in the dark (108.1 h−1) and outperforms most reported non-precious metal catalysts. Characterizations and theoretical calculations reveal that the enhanced light-promoted activity arises from light-induced electron transfer from the NH2-MIL-125 to the Ni active sites, which synergistically strengthens N2H4 adsorption and lowers the energy barrier for N─H bond cleavage, the rate-determining step. This work establishes visible-light promotion as a powerful strategy to enhance non-precious metal catalysis and offers a promising avenue for nitrogen-based hydrogen storage systems.