SIMS and TDS study of the reaction of water and oxygen on Pt(111)

  • Creighton J
  • White J
  • 6


    Mendeley users who have this article in their library.
  • 73


    Citations of this article.


The reaction of H216O with18O on Pt(111) was investigated using temperature programmed static secondary ion mass spectrometry (TPSSIMS), SSIMS and thermal desorption spectroscopy (TDS). The TPSSIMS behavior of the H3O+and H318O+signals, after coadsorption of the reactants at 95 K, indicates that the isotopic exchange rate increases sharply at temperatures above 130 K. At 150 K, hydroxyl formation is indicated by a sharp drop in the H3O+and a similar sharp increase in the H318O+signals. Using TDS, the overall stoichiometry of the reaction was determined to be 2H2O(a)+O(a)→ 3 OH(a)+H(a). SSIMS data suggest that at least two kinds of hydroxyls are formed and that they do not interconvert at 160 K. © 1982.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • J. R. Creighton

  • J. M. White

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free