In this paper, we have developed a new strategy to construct the acidic sites on the surface of supported transition-metal phosphide catalysts, which could precisely control the deposition of the Al₂O₃ atomic layer through atomic-layer deposition (ALD). A series of supported nickel phosphide catalysts decorated with Al₂O₃ film were prepared and characterized. The results show that Al₂O₃ film was deposited on the surface of the catalyst via AlOSi bonding, which does not affect or alter the characteristics of the as-prepared nickel phosphide phase. Most importantly, among all the Ni₂P-based catalysts, the Ni₂P/SiO₂-ALD catalyst with 10 Al₂O₃ layers possesses the optimal performance in hydrodesulfurization and hydrodearomatization reactions. In particular, superior hydrogenation performances were considered to be strongly related to a synergistic effect between nickel phosphide and the modulated acidic property. This precise stepwise ALD strategy opens a convenient route and provides a prospective design guideline for constructing high-performance hydrogenation catalysts.

在本文中，我们开发了一种新的策略来在负载的过渡金属磷化物催化剂的表面上构建酸性位点，该策略可以通过原子层沉积（ALD）精确控制Al ₂ O ₃原子层的沉积。制备并表征了一系列以Al ₂ O ₃膜修饰的负载型磷化镍催化剂。结果表明，Al ₂ O ₃膜通过Al O Si键合沉积在催化剂表面上，这不会影响或改变所制备的磷化镍相的特性。最重要的是，在所有基于Ni ₂ P的催化剂中，Ni ₂具有10 Al ₂ O ₃层的P / SiO ₂ -ALD催化剂在加氢脱硫和加氢脱芳香化反应中具有最佳性能。特别地，认为优异的氢化性能与磷化镍和调节的酸性之间的协同作用密切相关。这种精确的逐步ALD策略开辟了一条便利的途径，并为构建高性能的加氢催化剂提供了前瞻性的设计指南。