Studies of adsorption of α,β-unsaturated carbonyl compounds on heterogeneous Au/CeO₂, Au/TiO₂ and Au/SiO₂ catalysts during reduction by hydrogen.

ABSTRACT: Our research focuses on phenomena accompanying adsorption of mesityl oxide (4-methylpent-3-en-2-one) on the surface of heterogeneous supported gold catalysts: Au/CeO₂, Au/TiO₂ and Au/SiO₂. We have studied reduction in the gas phase of (volatile) α,β-unsaturated carbonyl compounds (R-(V)ABUCC) which mesityl oxide is a basic model of. In situ infrared (IR) spectroscopy was employed to establish that the most active catalysts allow adsorption of conjugated ketones or aldehydes in the enolate (i.e. bridge-like adsorption through the oxygen from the carbonyl group and the β-carbon) and carboxylic form or with the ^αC[double bond, length as m-dash]^βC double bond on a Lewis acidic site. Reductive properties of the catalysts and p

SUBMITTER: Zielinski M 

PROVIDER: S-EPMC8981266 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature