Ethanol (C2H5OH) adsorption, decomposition and oxidation is studied on Ir(111) using high-energy resolution, fast XPS and temperature-programmed desorption. During heating of an adsorbed ethanol layer a part of the C2H5OHad desorbs molecularly, and another part remains on the surface and decomposes around 200 K; these two decomposition pathways are identified, as via acetyl (H3CCO) and via COad+CH3ad, respectively. Acetyl and CH3ad decompose around 300 K into CHad (and COad). CHad decomposes forming Cx and H2 around 520 K. In the presence of Oad an acetate intermediate is formed around 180 K, as well as a small amount of CH3ad and COad. Acetate decomposes between 400-480 K into CO2, H2(/H2O) and CHad.
Weststrate, C. J., Ludwig, W., Bakker, J. W., Gluhoi, A. C., & Nieuwenhuys, B. E. (2007). Ethanol adsorption, decomposition and oxidation on Ir(111) : a high resolution XPS study. ChemPhysChem, 8(6), 932-937. https://doi.org/10.1002/cphc.200700055