INVESTIGADORES
COLLINS Sebastian Enrique
artículos
Título:
In situ FTIR and Raman Study on the Distribution and Reactivity of Surface Vanadia Species in V2O5/CeO2 Catalysts
Autor/es:
MARTA BOSCO; MIGUEL BAÑARES; MARÍA V. MARTÍNEZ-HUERTA; ADRIAN BONIVARDI; SEBASTIÁN COLLINS
Revista:
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 408 p. 75 - 84
ISSN:
1381-1169
Resumen:
tThe surface structure and reactivity of vanadia supported on ceria catalysts were studied by Ramanspectroscopy and methanol adsorption and temperature-programmed surface reaction (TPRS) of theadsorbed species monitored in situ by infrared spectroscopy. Monomeric and polymeric vanadia surfacespecies and CeVO4were identified on the catalysts. Methanol adsorption reveled that mostly reducedCe3+sites are present in the surface of the catalysts, produced as a result of the reductive solid reaction ofVOxspecies with the ceria surface. Adsorbed methanol/methoxy decomposed stepwise to formate and,finally, carbonate/carbon dioxide. The reactivity is linked to interphase sites, Ce-O-V, which could favorthe abstraction of hydrogen during the methoxy transformation to formates.
