A Fast XPS study of the surface chemistry of ethanol over Pt{1 1 1}

Adam F. Lee, David E. Gawthrope, Nicholas J. Hart, Karen Wilson

Research output: Contribution to journalArticle

Abstract

The adsorption and reaction of ethanol over Pt{1 1 1} has been investigated by Fast XPS and TPD. Ethanol adsorbs molecularly at 100 K, with a saturation coverage of 0.44 ML giving rise to C 1s components with binding energies of 283.7 eV (CH3–) and 284.8 eV (–H2COH). Ethanol multilayers desorb above 150 K, while ∼60% of the monolayer desorbs intact above 200 K in competition with decomposition pathways. Reaction initially proceeds via progressive dehydrogenation to form a metastable acetyl intermediate with components at 283.5 eV (CH3–) and 285.2 eV (-C=O), which in turn undergoes decarbonylation above 250 K to chemisorbed CO and methyl groups. A significant fraction of the latter are hydrogenated above 270 K, desorbing as CH4, with the remainder further decomposing to liberate H2 and surface CHx moeities.
Original languageEnglish
Pages (from-to)200-208
Number of pages9
JournalSurface science
Volume548
Issue number1-3
DOIs
Publication statusPublished - 1 Jan 2004

Fingerprint Dive into the research topics of 'A Fast XPS study of the surface chemistry of ethanol over Pt{1 1 1}'. Together they form a unique fingerprint.

  • Cite this

    Lee, A. F., Gawthrope, D. E., Hart, N. J., & Wilson, K. (2004). A Fast XPS study of the surface chemistry of ethanol over Pt{1 1 1}. Surface science, 548(1-3), 200-208. https://doi.org/10.1016/j.susc.2003.11.004