OC28 Mechanism and Site Requirements for NO Oxidation Catalysis and NOx Adsorption on Dispersed Metal and Oxide Substrates

Tuesday, June 7, 2011: 3:40 PM
Cartier Ballroom (Detroit Marriott Hotel at the Renaissance Center )
Brian Weiss1, Nancy Artioli2, Kyle B. Caldwell2 and Enrique Iglesia2, (1)Department of Chemical Engineering, University of California, Berkeley (USA), Berkeley, CA, (2)Department of Chemical Engineering, University of California Berkeley, Berkeley, CA
NO oxidation on Pt, PdO, RhO2, and Co3O4 involves kinetically-relevant O2 activation on vacancies that become more abundant with increasing cluster size. NO oxidation rates increase as BaO sites bind NO2 that inhibits catalysis. NO2 adsorption from combustion effluents requires oxidation of nitrites to nitrates by N2O4 formed on Pt.

Extended Abstracts: