NO reduction under diesel exhaust conditions over Au/Al2O3 prepared by deposition-precipitation method

TitleNO reduction under diesel exhaust conditions over Au/Al2O3 prepared by deposition-precipitation method
Publication TypeJournal Article
Year of Publication2010
AuthorsMiguel, P, Granger, P, Jagtap, N, Umbarkar, SB, Dongare, MK, Dujardin, C
JournalJournal of Molecular Catalysis A-Chemical
Volume322
Issue1-2
Pagination90-97
Date PublishedMAY
ISSN1381-1169
KeywordsDeposition-precipitation, Gold, In situ IR, NO reduction, XPS
Abstract

Gold supported on alumina was prepared by urea deposition-precipitation method and compared to silver supported on alumina for the selective catalytic reduction of NO by hydrocarbons under lean conditions. The catalyst showed activity in the reduction of NO and 100% selectivity towards N-2 in the temperature range 300-350 degrees C. At higher temperature the NO conversion decreased due to competitive oxidative reactions of the reductants. XPS analysis confirmed the good stability of gold nanoparticles deposited on alumina. Infrared studies showed the formation of various adsorbed species (formates, carboxylates, ad-NOx and cyanide) on the catalyst surface. Addition of H-2 to the feed containing decane enhanced the formation of these species on the catalyst surface as well as the catalytic activity for the NO conversion to N-2. (C) 2010 Elsevier B.V. All rights reserved.

DOI10.1016/j.molcata.2010.02.024
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)2.872
Divison category: 
Catalysis and Inorganic Chemistry