Abstract
The oxidative dehydrogenation of propan-2-ol has been investigated using a thermal molecular beam system. The main products after predosing the surface with oxygen atoms are the dehydrogenated molecule (acetone), water and hydrogen. The effect of oxygen is to enhance the sticking of propan-2-ol from approximately 0.05 on the clean surface to 0.76 (±0.02). By varying the oxygen predose we have shown unambiguously that precursor state effects dominate the catalytic reaction, since at oxygen coverages as low as 0.008 monolayers the propanol sticking probability remains at 0.76. This is due to the long lifetime and diffusivity of the reactant on the surface enabling it to‘seek out’ the active sites (those with oxygen atoms) on the surface.
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References
J. Taylor and I. Langmuir, Phys. Rev. 44 (1933) 423.
P. Kisliuk, J. Phys. Chem. Solids 3 (1957) 95 and 5 (1958) 78.
J. Becker and C. Hartman, J. Phys. Chem. 57 (1953) 157.
D.A. King and M.G. Wells, Proc. Roy. Soc. (London) A339 (1974) 245.
S.P. Singh-Boparai, M. Bowker and D.A. King, Surf. Sci. 53 (1975) 55.
D.A. King, Surf. Sci. 64 (1977) 43.
A. Cassuto and D.A. King, Surf. Sci. 102 (1981) 388.
M. Bowker, P.D.A. Pudney and C. Barnes, J. Vac. Sci. Tech., in press.
C. Barnes, P.D.A. Pudney, Q. Guo and M. Bowker, J. Chem. Soc., Faraday Trans. (May 1990) to be published.
M. Bowker, S.M. Francis, R.W. Joyner and P.D.A. Pudney, Surface Science, to be submitted.
F. Chua, Y. Kuk and P. Silverman, Phys. Rev. Letts. 63 (1989) 386.
J. Pedley and J. Rylance,Sussex-NPL Computer Analysed Thermochemical Data (University Sussex, 1977).
M. Bowker and R.J. Madix, Surf. Sci. 116 (1982) 549.
See, for instance, R. Gasser,An Introduction to Chemisorption and Catalysis by Metals (Clarendon Press, Oxford, 1985) p. 196.
A.F. Carley, M.W. Roberts and S. Yan, J. Chem. Soc., Chem. Commun. (1988) 267.
P.G. Blake and M.W. Roberts, Catal. Letts. 3 (1989) 399; See also M. W. Roberts, Chem. Soc. Rev. 18 (1989) 451.
C.R. Henry, C. Chapon, C. Duriez and S. Giorgio, in preparation.
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Bowker, M., Pudney, P.D.A. Precursor state effects in catalysis: Oxidative dehydrogenation of propan-2-ol on Cu(110). Catal Lett 6, 13–21 (1990). https://doi.org/10.1007/BF00764048
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DOI: https://doi.org/10.1007/BF00764048