K. Prabhakaran

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

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 ~ 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 O1− 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.

Studies of molecular oxygen adsorbed on Cu surfaces

Molecular oxygen adsorbed on (110) and polycrystalline Cu surfaces has been investigated by UPS, XPS, AES, HREELS and LEED. Molecularly adsorbed

A combined EELS-XPS study of molecularly chemisorbed oxygen on silver surfaces: Evidence for superoxo and peroxo species

O_2

Precursor species of carbon monoxide before its dissociation on aluminium-promoted Ni and Cu surfaces☆

on the (110) surface shows the characteristic three-peak HeII spectrum due to

Adsorption of carbonyl compounds on clean and modified Cu(110) surfaces : a combined EELS-UPS study

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Temperature dependence of the surface conductivity of YBa2Cu3O7−δ accompanying the change in the concentration of dimerized oxygen holes

,

Nitrogen adsorbed on clean and promoted Ni surfaces

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Surface science lettersEffect of chlorine on the adsorption of oxygen on Cu and Ag surfaces

and

Hydroxylation of oxygen-covered Cu(110) and Zn(0001) surfaces by interaction with CH3OH, (CH3)2NH, H2S, HCl and other proton donor molecules

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Interaction of carbon monoxide with surfaces of metglasses

orbitals, accompanied by an O-O stretching frequency at 660