A fast XPS study of propene decomposition over clean and sulphated Pt{111}

Lee, Adam F., Wilson, Karen, Goldoni, Andrea, Larciprete, Rosanna and Lizzit, Silvano (2002). A fast XPS study of propene decomposition over clean and sulphated Pt{111}. Catalysis Letters, 78 (1-4), pp. 379-382.


The thermal decomposition of propene over clean and sulphate precovered Pt{111} has been followed by Fast XPS. The saturation propene coverage over the clean surface is 0.21 mL at 90 K. Propene is stable up to 200 K, above which molecular desorption and dehydrogenation result in the formation of a stable propylidyne intermediate adlayer at 300 K. Propylidyne decomposes above 400 K eventually forming graphitic carbon above 800 K. Preadsorbed surface sulphate promotes room temperature propene combustion associated with the decomposition of a thermally unstable alkyl--sulphate complex. Propylidyne also forms as on clean Pt{111}, but is less reactive, its decomposition above 450 K triggering partial oxidation with residual surface oxygen to liberate gas phase CO.

Publication DOI: https://doi.org/10.1023/A:1014921021037
Divisions: Engineering & Applied Sciences > Chemical engineering & applied chemistry
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Uncontrolled Keywords: x-ray photoelectron spectroscopy,catalysis,surface chemical reaction,alkenes
Full Text Link: http://link.spr ... 3A1014921021037
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2002-03-01
Authors: Lee, Adam F. ( 0000-0002-2153-1391)
Wilson, Karen ( 0000-0003-4873-708X)
Goldoni, Andrea
Larciprete, Rosanna
Lizzit, Silvano

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