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Adsorption of biacetyl on Rh/SiO2 catalysts: An FTIR study

✍ Scribed by Tilman Beutel; Boris L. Moroz; Helmut Knözinger

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
456 KB
Volume
113
Category
Article
ISSN
0165-0513

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✦ Synopsis

Abstract

Biacetyl (butane‐2,3‐dione) adsorbs to silica via H bonding. Splitting of the central C‐C bond occurs on adsorption on Rh particles in Rh/SiO~2~ catalysts. The resulting surface‐acetyl species seems to undergo rapid decomposition even at temperatures below 300K and leads to the formation of chemisorbed CO and methyl fragments. Based on the principle of microscopic reversibility, it is concluded that acetyl species may be formed under catalytic conditions from chemisorbed CO and methyl species by migratory insertion of CO into the metal‐carbon bond of a chemisorbed methyl fragment.

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