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

Carley, Albert Frederick, Davies, Philip Rosser ORCID: https://orcid.org/0000-0003-4394-766X, 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:	Schools > Chemistry Research Institutes & Centres > Cardiff Catalysis Institute (CCI)
Subjects:	Q Science > QD Chemistry
Uncontrolled Keywords:	gold - barium - oxygen transients - ethene
Publisher:	Springer
ISSN:	1011-372X
Last Modified:	18 Oct 2022 12:34
URI:	https://orca.cardiff.ac.uk/id/eprint/10349

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