XAS study of Ni2P/MCM-41 passivated by O-2/He and H2S/H-2
- 化学化工－已发表论文 
Ni2P/MCM-41 with a stoichiometric Ni/P ratio prepared using a H-2 plasma reduction method was passivated either by 10.0 vol.% H2S/H-2 (Ni2P-S) or 1.0 vol.% O-2/He (Ni2P-O). The XAS characterization demonstrated that the Ni-P bond of Ni2P was more sensitive to O-2 than the Ni-Ni bond while H2S mainly reacted with Ni-Ni site. Moreover, Ni species in Ni2P-S was more electron-deficient. The different hydrodesulfurization performances of Ni2P-S and Ni2P-O were discussed by considering their different structure and electronic properties as well as the formation of a covalent nickel phosphosulfide phase. (C) 2013 Elsevier B.V. All rights reserved.