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Chemical Control of Noble Metal Catalysis by Main Group Elements

Published online by Cambridge University Press:  10 February 2011

K. Asakura ,
K. Okumura ,
T. Inoue ,
T. Kubota ,
W-J. Chun  and
Y. Iwasawa
K. Asakura
Affiliation:
Research Center for Spectrochemistry, Faculty of Science, the University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan, [email protected]
K. Okumura
Affiliation:
Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan, [email protected]
T. Inoue
Affiliation:
Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan, [email protected]
T. Kubota
Affiliation:
Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan, [email protected]
W-J. Chun
Affiliation:
Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan, [email protected]
Y. Iwasawa
Affiliation:
Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113–0033, Japan, [email protected]
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Abstract

The catalytic interaction of noble metal and main group elements in Rh/one-atomic layer GeO2/SiO2 and Pt/SbOx was investigated. The high temperature reduction produced RhGe and PtSb bimetallic particles in which Pt and Rh were electronically modified to retard catalytic activity. However, unique selective catalyses of Rh/one-atomic layer GeO2/SiO2 for CO hydrogenation reaction to oxygenate compounds and for NO+CO reaction to N2 were found. Under the low temperature reduction of Rh/one-atomic layer GeO2/SiO2 and the high temperature calcination of Pt/SbOx, the oxide phases, GeO2 and SbOx, were stable and the selective reduction of ethylacetate to ethanol and the selective oxidation of iso-C4H10 to methacrolein were observed. The high selectivities were ascribed to synergistic interaction between the noble metals and the main group element oxides through the diffusion of adsorbed species and reaction intermediates. The possibility of chemical control of noble metal-catalyses by main group elements is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 497: Symposium Z – Recent Advances in Catalytic Materials , 1997 , 99
Copyright
Copyright © Materials Research Society 1998

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References

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