Issue 14, 2000
From the journal:

Physical Chemistry Chemical Physics

FTIR study of CO and NO adsorbed on nitrided CoMo/Al2O3 catalysts

Shuwu Yang,a   Yongxue Li,c   Jiang Xu,a   Can Li,*a   Qin Xin,a   I. Rodriguez-Ramosb  and  A. Guerrero-Ruiz*d  

* Corresponding authors

a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, the Chinese Academy of Sciences, PO Box 110, Dalian, China

b Instituto de Catalisis y Petroleoqumica, CSIC, Campus Cantoblanco, Madrid, Spain

c Leerhulme Centre for Innoatie Catalysis and IRC, Surface Science, Uniersity of Lierpool, Lierpool, UK

d Dpto. Química Inorgánica y Técnica, Facultad de Ciencias, UNED, Madrid, Spain
E-mail: aguerrero@ccia.uned.es

Abstract

The states of surface Co and Mo sites on nitrided CoMo supported on Al2O3 were studied by adsorption of CO and NO as IR probe molecules. Three IR bands at 2200, 2060 and 2025 cm−1 were detected for adsorbed CO. These bands can be respectively attributed to the surface NCO species as a result of CO adsorbed on surface N sites, and linearly adsorbed CO on surface Co and Mo sites in low valence states. The addition of cobalt to the Mo nitride diminishes the band at 2200 cm−1. This may be due to either the change of the surface structure of the supported nitride, or the formation of a new phase, CoxMoyNz, as suggested in the literature Kim etal., Catal. Lett., 1997, 43, 91 and Logan etal., Catal. Lett., 1998, 56, 165. Comparison of CO and NO adsorption on Mo2N/Al2O3 and CoMoNx/Al2O3 indicates that the presence of cobalt can promote the reduction and nitridation of Mo.

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Article information

DOI
https://doi.org/10.1039/B002557G
Article type
Paper
Submitted
30 Mar 2000
Accepted
26 May 2000
First published
15 Jun 2000

Phys. Chem. Chem. Phys., 2000,2, 3313-3317

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FTIR study of CO and NO adsorbed on nitrided CoMo/Al2O3 catalysts

S. Yang, Y. Li, J. Xu, C. Li, Q. Xin, I. Rodriguez-Ramos and A. Guerrero-Ruiz, Phys. Chem. Chem. Phys., 2000, 2, 3313 DOI: 10.1039/B002557G

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