Probing surface properties and reaction intermediates during heterogeneous catalytic oxidation of acetaldehyde

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)286-294
Journal / PublicationChemCatChem
Volume1
Issue number2
Publication statusPublished - 5 Oct 2009
Externally publishedYes

Abstract

The influence of Cu on various metal oxide supports was investigated for the catalytic oxidation of acetaldehyde (ACA). The activity of the catalysts towards ACA conversion and the CO2 yield decrease in the order: Cu/CeO2>Cu/TiO2≈Cu/ZrO2> Cu/Al 2O3>Cu/SiO2. Spontaneous adsorptive conversion of ACA to surface carboxylates, such as bridging and bidentate acetates, was detected over the basic supports CeO2, TiO2, and ZrO2. Detailed temperature-programmed studies found the high activity of Cu/CeO2 to stem mainly from the intrinsically high activity of the CeO2 support. In contrast, similar studies on Cu/TiO2 demonstrated the activity improvements imparted by Cu were predominantly additive. Despite the difference in origin of ACA oxidation activity over Cu/CeO2 and Cu/TiO2, the overall concerted effects of basicity-induced carboxylate formation and availability of surface oxygen were thought to be overriding factors crucial in the overall catalytic reactivity. © 2009 Wiley-VCH Verlag GmbH& Co. KGaA, Weinheim.

Research Area(s)

  • Aldehydes, Copper, Heterogeneous catalysis, Surface chemistry, Temperature-programmed desorption

Citation Format(s)

Probing surface properties and reaction intermediates during heterogeneous catalytic oxidation of acetaldehyde. / Kydd, Richard; Teoh, Wey Yang; Scott, Jason et al.
In: ChemCatChem, Vol. 1, No. 2, 05.10.2009, p. 286-294.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review