关键词: 磷化镍, 催化剂, 制备, 表征, 加氢脱硫

Abstract: The diminishing quality of petroleum feedstocks coupled with increasingly stringent environmental regulations have made the removal of sulfur and nitrogen an important problem in refining industry. Nickel phosphide (Ni2P) has recently received much attention because of its high activity for the hydrodesulfurization and hydrodenitrogenation of fuels. The present article intends to review recent progress in fabrication，characterization and catalytic performance of Ni2P. Reduction with phosphine，hypophosphite and the plasma reduction of phosphate can be carried out at lower temperatures，which leads to smaller articles and more active Ni2P catalyst. STM study has shown that Ni2P(0001) surface has two possible terminations in which the Ni∶P ratios are 3∶1 (Ni3P termination) and 3∶1 (Ni3P2 termination). On the Ni3P terminated surface the Ni atoms have a square pyramidal structure，and on the Ni3P2 terminated surface the Ni atoms have a tetrahedral structure. Evidence is found for dissociative hydrogen adsorbed on the Ni3P surface of Ni2P(0001)，but not on the Ni3P2 surface，indicating that the square pyramidal sites on the Ni3P surface have high reactivity. It is proposed that Ni2P is a potentially promising catalyst for hyroprocessing process.

Key words: nickel phosphide, catalyst, fabrication, characterization, hydrodesulfurization