Promoting effect of TiO2 on the hydrodenitrogenation performance of nickel phosphide

Xiang Li, Mohong Lu, Anjie Wang, Chunshan Song, Yongkang Hu

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

TiO2-containing bulk Ni2P catalysts (Ti x-Ni2P) were prepared by coprecipitation and in situ H2 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. Tix-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.

Original languageEnglish (US)
Pages (from-to)16584-16592
Number of pages9
JournalJournal of Physical Chemistry C
Volume112
Issue number42
DOIs
StatePublished - Oct 23 2008

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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