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Electron Spectroscopic Studies of Formic Acid Adsorption and Oxidation on Cu and Ag dosed with Barium

Ayyoob, Mohammed and Hegde, Manjanath S (1986) Electron Spectroscopic Studies of Formic Acid Adsorption and Oxidation on Cu and Ag dosed with Barium. In: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 82 . 1651 -1662.

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Abstract

X.p.s. and u.p.s. studies on the adsorption of $HCO_2$H on barium-covered Cu and Ag surfaces saturated with oxygen show an enhanced reactivity of adsorbed oxygen towards proton abstraction from $HCO_2H$. Two distinct types of adsorbed formate species, one associated with Cu or Ag and the other associated with barium are seen at 300 K. The formates associated with Cu or Ag show greater thermal stability and higher activation energy of decomposition in presence of barium. The decomposition of formate on oxygen presorbed Cu gives only $H_2$O and $CO_2$ while on the barium covered Cu and Ag surfaces, the formation of CO is also observed. Quantitative estimates of the surface concentrations of adsorbed species has been made with respect to temperature and the formate decomposition pathway on the barium dosed surfaces has been suggested.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Royal Society of Chemistry
Keywords: Electron Spectroscopic;Formic Acid;Adsorption;Oxidation;Cu;Ag;Barium.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 04 Aug 2008
Last Modified: 19 Sep 2010 04:48
URI: http://eprints.iisc.ernet.in/id/eprint/15397

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