Istituto dei materiali per l'elettronica ed il magnetismo     
Kravchuk T., Vattuone L., Burkholder L., Tysoe W. T., Rocca M. Ethylene decomposition at undercoordinated sites on Cu(410). In: Journal of the American Chemical Society, vol. 130 pp. 12552 - 12553. American Chemical Society, 2008.
We demonstrate the selective, low-temperature chemistry of ethylene on the strongly undercoordinated sites of Cu(410) by investigating its adsorption by high-resolution electron energy loss spectroscopy (HREELS), X-ray photoelectron spectroscopy (XPS), and temperature-programmed desorption (TPD). After dosing ethylene at 110 K, apart from the expected π-bonded species adsorbed on terraces, di-σ-bonded ethylene and carbon are formed at the step edges. The latter product results from the complete dehydrogenation of ethylene and blocks sites for further dissociation and/or di-σ-adsorption. However, these processes can be restored merely by heating the sample to 900 K, by causing the carbon to diffuse into the bulk. The presented results support the relevance of copper-based catalysts for the steam reforming process.
URL: http://pubs.acs.org/doi/abs/10.1021/ja802105z
DOI: 10.1021/ja802105z
Subject gas surfeca interaction, ethene, Copper, dissociation

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