CO and NO adsorption on alumina-Pd-Mo catalysts: Effect of the precursor salts
The effect of the palladium precursor on the CO and NO adsorption capacity of Pd-MoO{sub 3}/Al{sub 2}O{sub 3} catalysts was studied. TPR and IR analysis showed that the palladium addition promoted the reduction of Mo{sup 6+} to MO{sup 4+}. The presence of a higher amount of molybdenum oxide partially reduced improved the NO dissociation to N{sub 2} and N{sub 2}O on Pd-Mo/Al{sub 2}O{sub 3} catalysts. This behavior was attributed to the formation of a lower fraction of inactive adsorbed nitrogen species on molybdenum oxide partially reduced. The catalytic behavior of the Pd-Mo/Al{sub 2}O{sub 3} catalysts on the NO + CO reaction could be explained by a bifunctional mechanism. After adsorption and dissociation of NO on Mo{sup 4+}, the oxygen dissociated is transferred to the Pd. The CO adsorbed on the Pd surface reacts to CO{sub 2}.
- Research Organization:
- Univ. Federal do Rio de Janeiro (BR)
- OSTI ID:
- 20005899
- Journal Information:
- Journal of Catalysis, Vol. 188, Issue 2; Other Information: PBD: 10 Dec 1999; ISSN 0021-9517
- Country of Publication:
- United States
- Language:
- English
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