博士生龙建军在Int J Hydrogen Energy （中科院二区，IF=8.3）发表论文“Active site engineering in NiPt nanoparticles enabling enhanced selective decomposition of hydrous hydrazine”。

摘要：

The design of high-performance catalysts for rapid and selective decomposition of hydrous hydrazine (N2H4·H2O) is crucial for its large-scale application and plays a pivotal role in the future industrial application of hydrogen energy. Here, ultrafine monodispersed NiPt nanoparticles (NPs) confined by P-doped carbon-encapsulated MoC (NiPt/MoC@P–C) are fabricated through a wet-chemical synthesis strategy. The introduction of P and MoC increases the carbon defect content, promoting the adsorption of metal ions and leading to the formation of monodispersed and small-sized NiPt NPs (2.2 nm). Furthermore, the presence of P and MoC also increases the surface electronic density of the catalyst, enhancing the electron density of active centers. Due to these factors, the NiPt NPs in the prepared catalyst possess small particle size, high metal dispersion, and high electron density. Consequently, the optimized Ni0.5Pt0.5/MoC@P–C exhibits outstanding catalytic performance in achieving the complete dehydrogenation of N2H4·H2O, with a turnover frequency (TOF) up to 1626 h−1 under alkaline conditions at 323 K. This performance is significantly higher than that of free Ni0.5Pt0.5 NPs (37 h−1), Ni0.5Pt0.5/MoC@C (563 h−1), and Ni0.5Pt0.5/P–C (373 h−1), and surpasses almost all reported catalysts for dehydrogenation of N2H4·H2O. This work proposes an effective strategy for optimizing active centers in the design of high-performance N2H4 dehydrogenation catalysts, offering valuable insights for the development of hydrogen production catalysts for liquid-phase chemical hydrides.

原文链接：https://doi.org/10.1016/j.ijhydene.2025.152729