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A reactive oxygen state at a barium promoted Au (100) surface: the oxidation of ethene at cryogenic temperatures

Carley, Albert Frederick, Davies, Philip Rosser, Roberts, Meirion Wyn and Shah, Aarti M. 2005. A reactive oxygen state at a barium promoted Au (100) surface: the oxidation of ethene at cryogenic temperatures. Catalysis Letters 101 (3-4) , pp. 137-139. 10.1007/s10562-005-4879-1

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Abstract

Although Au (100) does not adsorb oxygen at either 295 K or 80 K, a barium modified Au(100) surface is active in oxygen dissociation resulting, through surface diffusion of oxygen adatoms, in the formation of a chemisorbed oxygen adlayer. This oxygen species is inactive for ethene oxidation, as is the oxygen species pre-adsorbed at an Au(100)-Ba surface at 80 K, and the clean Au(100)-Ba surface. However, when molecularly adsorbed ethene present at a Au(100)-Ba surface at 80 K is exposed to dioxygen and warmed to 140 K, surface carbonate is observed. We conclude that a transient oxygen species is the oxidant.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: gold - barium - oxygen transients - ethene
Publisher: Springer
ISSN: 1011-372X
Last Modified: 17 Jun 2017 03:03
URI: http://orca.cf.ac.uk/id/eprint/10349

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