Реферат: Lean-burn engine technology offers improved fuel economy; however, the reduction of NOx during lean-operation continues to be a major technical hurdle in the implementation of energy efficient technology. Recently reported passive NH3-SCR system (PASS)– a simple, low-cost, and urea-free system – has the potential to enable the implementation of lean-burn gasoline engines; however, the system suffers from CO slips during extended rich operations. The slipped CO can be easily oxidized with supplemental oxygen feed over platinum group metal (PGM)-based catalysts; however the PGM-based catalysts simultaneously oxidize the generated NH3. This work focuses on the preparation of catalysts that can preferentially oxidize CO in the presence of NH3. Highly active bimetallic Au-Ru/Al2O3 catalysts were prepared by the method of [AuCl4]− reduction by hydrogen preadsorbed on a parent monometallic Ru/Al2O3 catalyst serving as a carrier. The temperature-programmed reduction studies confirmed a strong interaction between the Au and Ru particles in the samples prepared by this redox method. The average size of crystallites was less than 7 nm and 20 nm for Au and Ru, respectively. The activity of the catalysts was studied in the reaction of oxidation of a mixture of CO with NH3. The catalytic activity in CO oxidation was found to be higher over the bimetallic Au-Ru/Al2O3 catalyst compared to the monometallic Ru/Al2O3 and Au/Al2O3 catalysts. On the contrary, in NH3 oxidation, the bimetallic Au-Ru/Al2O3 catalyst exhibited a decreased activity compared to the relevant monometallic catalysts. Preparation of Au-Ru/Al2O3 samples by the commonly used method of deposition-precipitation with urea resulted in the less catalytically active samples due to the formation of larger Au particles and their separate deposition from Ru.

Библиографическая ссылка: Kirichenko O.A. , Redina E.A. , Davshan N.A. , Mishin I.V. , Kapustin G.I. , Brueva T.R. , Kustov L.M. , Li W. , Kim C.H.
Preparation of alumina-supported gold-ruthenium bimetallic catalysts by redox reactions and their activity in preferential CO oxidation
Applied Catalysis B: Environmental. 2013. V.134-135. P.123-129. DOI: 10.1016/j.apcatb.2012.12.039 WOS Scopus РИНЦ OpenAlex

Идентификаторы БД:

Web of science:	WOS:000316583500015
Scopus:	2-s2.0-84873806217
РИНЦ:	20433755
OpenAlex:	W1974028355

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БД	Цитирований
OpenAlex	30
Scopus	28

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