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论文类型：期刊论文

发表时间：2008-10-01

发表刊物：JOURNAL OF PHYSICAL CHEMISTRY C

收录刊物：SCIE、EI、Scopus

卷号：112

期号：42

页面范围：16584-16592

ISSN号：1932-7447

摘要：TiO2-containing bulk Ni2P catalysts (Ti-x-Ni2P) were prepared by coprecipitation and in situ H-2 temperature-programmed reduction (TPR), and characterized by XRD, CO chemisorption, TEM, XPS, TPR, and NH3-TPD. Their hydrodenitrogenation performances were studied by using quinoline and decahydroquinoline (DHQ) as the model molecules. Both the hydrogenation and C-N bond cleavage activities of Ni2P were improved by the introduction of TiO2. The TiO2 species were mainly located separately on the surface of the catalysts and had strong interactions with surface Ni and P species. The reducibility of the precursors as well as the surface electronic properties of Ni2P catalysts were affected by the addition of TiO2. Ti-x-Ni2P showed higher CO uptake but less acid sites than Ni2P. The promoting effect of TiO2 was discussed by considering the electronic interactions between surface Ti and Ni2P species and changes in the adsorption geometries of quinoline, DHQ, as well as the partially hydrogenated intermediates over Ti-x-Ni2P.