Ni-P非晶合金催化剂的制备、结构和性能

Preparations,Structures and Properties of Amorphous Ni-P Alloy Catalysts 

超细非晶态合金ＭＰ或ＭＢ(Ｍ=Ｎｉ,Ｃｏ,Ｆｅ)的高比表面和结构不规整性使其表现出催化加氢的高活性和选择性,有可能成为新型石油化工加氢催化剂[1-3].其制备主要有物理和化学两类方法[3-5].从提高催化活性角度,化学还原法是最为优越的方法.ＮｉＢ催化活性明显高于ＮｉＰ...

Benzene hydrogenation was used as a test reaction for the ultrafine amorphous Ni P catalysts prepared by chemical reduction.The results show that the preparation temperature and initial pH of the solutions strongly affect their structures and the activities of benzene hydrogenation.XAFS and DTA were employed to characterize the structures of the amorphous Ni P alloys prepared under different conditions and annealed at various temperatures.It was found that an abrupt decrease of the catalytic activity was observed at the annealing temperature of about 300℃,which corresponds to the crystallization temperature of the amorphous Ni P alloy catalysts.