Precursor Species of Carbon Monoxide Before its Dissociation on Aluminium-Promoted Ni and Cu Surfaces

Rao, CNR and Rajumon, MK and Prabhakaran, K and Hegde, MS and Kamath, PV (1986) Precursor Species of Carbon Monoxide Before its Dissociation on Aluminium-Promoted Ni and Cu Surfaces. In: Chemical Physics Letters, 129 (2). pp. 130-134.

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Abstract

Carbon monoxide adsorbed on Al-promoted Ni and Cu surfaces undergoes facile dissociation at 300 K or below. CO adsorbed on an Al-promoted Ni surface shows a larger separation (3.5 eV) between the 5\sigma and 4\sigma levels compared to that on a clean Ni surface (3.0 eV), besides exhibiting a low C-O stretching frequency. CO adsorbed on an Al-promoted Cu surface shows a similar large 5\sigma - 4\sigma separation; this is accompanied by the disappearance of the satellites in the valence band and O(ls) regions. These features of CO adsorbed on Al-promoted Ni and Cu surfaces characterize the precursor to dissociation. Molecular orbital calculations suggest that CO bonds parallel to the Al-promoted Cu surface.

Item Type:	Journal Article
Publication:	Chemical Physics Letters
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	04 Jul 2008
Last Modified:	19 Sep 2010 04:46
URI:	http://eprints.iisc.ac.in/id/eprint/14781

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