关键词: 磷化钴, 氨硼烷, 储氢材料, 盐模板剂法

Abstract: The development of a kind of catalyst with high activity and high selectivityunder mild conditions is the key to realize the application ofhydrolysis of ammonia borane(AB)for hydrogen production. Starting from the construction of P-doped materials, the catalyst with two different proportions of metal salts as the salt template and the transition non-precious metal Co²⁺ as the center metal was prepared. The Co₃O₄ precursor was prepared by cobalt acetate and ammonia water, and the Co₃O₄ precursor was mixed with NaH₂PO₄, NaCl and LiCl, and calcined in N₂ atmosphere to synthesize Co₂P-NaLi catalyst. After washing, the two salt templates were removed to obtain the final Co₂P-NaLi catalyst, which was a highly efficient catalyst that could react under mild conditions. The results showed that the catalytic activity of Co₂P-NaLi_0.15 catalyst was the highest when n(NaCl)∶n(LiCl)＝1:0.15, its initial conversion rate(TOF) was 31.2 min^-1at 298 K under light irradiation, and the activation energy (E_a)for the decomposition of ammonia borane on the catalyst was 60.8 kJ/mol. After 5 cycles, the catalytic still keep goodactivity, whichindicated that it had good stability.

Key words: cobalt phosphide, ammonia borane, hydrogen storage material, salt template method