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Adsorption of oxygen on (100), (110) and (111) surfaces of Ag, Cu and Ni: an electron spectroscopic study

Rajumon, MK and Prabhakaran, K and Rao, CNR (1990) Adsorption of oxygen on (100), (110) and (111) surfaces of Ag, Cu and Ni: an electron spectroscopic study. In: Surface Science, 233 (2). L237-L242.

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Abstract

Adsorption of oxygen has been studied on (111), (110) and (100) surfaces of Ag, Cu, and Ni employing XPS and UPS. Besides atomic species with an O(1s) binding energy of \sim 530 eV, molecular adsorption is found on all the three Ag surfaces associated with a characteristic O(1s) binding energy of 532 eV. He II spectra show a feature around 2.5 eV due to the molecular species. Molecular adsorption is also found on all the three surfaces of Cu with a characteristic binding energy of 533 eV. He II spectra show characteristic features due to molecular adsorption on these surfaces at 100 K. The proportion of molecular species is maximum on the (111) surfaces and least on the (110) surfaces of both Ag and Cu. On Ni surfaces, there is no molecular adsorption; a unique O(1s) feature ascribed to $O^{1-}$ species is found at 531 eV. The intensity of this feature does not vary significantly with temperature in contrast to the O(1s) feature due to the molecular species on Ag and Cu surfaces.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Depositing User: Ramya Krishna
Date Deposited: 24 Jun 2008
Last Modified: 19 Sep 2010 04:42
URI: http://eprints.iisc.ac.in/id/eprint/13068

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