Elsevier

Surface Science

Volume 210, Issues 1–2, 2 March 1989, Pages 27-45
Surface Science

Photoelectron spectroscopy studies of the hydrogenation of cyanogen on Pt(111): Comparison with HCN and ethylenediamine

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Abstract

X-ray photoelectron spectra as a function of anneal temperature are used to compare the thermally initiated chemistry of C2N2 + H2 on Pt(111) with that of C2N2, HCN and ethylenediamine. These spectra show that the product of the reaction of C2N2 with coadsorbed hydrogen (the γ state of C2N2 + H2/Pt(111)) is not HCN but is more likely to be a surface di-imine species. The N1s binding energy of this partially hydrogenated species is ∼ 399.3 eV. HCN adsorption on Pt(111) leads to two distinct chemical species with N1s binding energies of 398.6 and 396.9 eV which are interpreted in terms of molecular and dissociative adsorption respectively.

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    Present address: Aerojet Electrosystems Co., MS 170-8244, P.O. Box 296, Azusa, CA 91702, USA.

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    Present address: Rockwell International, 3370 Miraloma Avenue, Anaheim, CA 92803-3105, USA.

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