Abstract
Thermal molecular beam studies of the oxidative dehydrogenation of methanol over the 1/4 ML and 1/2 ML oxygen predosed CuPd[85 ∶ 15]{110}p(2 × 1) surfaces has been performed. Post reaction thermal desorption spectroscopy (TDS) clearly shows that during these experiments observable levels of formate are produced. This is in contrast to the results of similar experiments performed over oxidised Cu{110} surfaces which showed little formate production. It is hypothesised that the alloying in the surface region causes this new reaction pathway to appear as a consequence of a modification of the stability of one or more of the reactive intermediates produced in this reaction. It is proposed that these modifications of adsorbate stability are due to a ligand effect arising from the presence of Pd in the second layer of the selvedge.
Similar content being viewed by others
References
J.A. Rodriguez and D.W. Goodman, J. Phys. Chem 95 (1991) 4196.
A. Noordermeer, G.A. Kok and B.E. Nieuwenhuys, Surf. Sci. 172 (1986) 349.
D.J. Holmes, D.A. King and C.J. Barnes, Surf. Sci. 227 (1990) 179.
M.A. Newton, S.M. Francis and M. Bowker, Surf. Sci. 259 (1991) 45.
R.S. Rao, A. Bansil, H. Aasonen and M. Pessa, Phys. Rev. B 35 (1987) 1713.
M. Lindroos, C.J. Barnes, M. Bowker and D.A. King, in:Proc. ICSOS III, The Structure of Surfaces III, Springer Series in Surface Sciences 24, eds. S.Y. Tong, M.A. Van Hove, K. Takayanagi and X.D. Xie (Springer, Berlin, 1990) p. 287.
M.A. Newton, S.M. Francis and M. Bowker, Phys. Rev. Lett., submitted.
M.A. Newton and M.A. Bowker, to be published.
M.A. Newton, S.M. Francis and M. Bowker, Phys. Rev. B 45 (1992) 945;
M.A. Newton, S.M. Francis and M. Bowker, Surf. Sci. 269/70 (1992) 41.
I. Wachs and R.J. Madix, J. Catal. 53 (1978) 208.
S.M. Gates, J.N. Russel Jr. and J.T. Yates Jr., Surf. Sci. 159 (1985) 233.
C.J. Barnes, P.D.A. Pudney, Q. Guo and M. Bowker, J. Chem. Soc. Faraday. Trans. 86 (1990) 2693.
M. Bowker and R.J. Madix, Surf. Sci. 102 (1981) 542.
G.C. Chinchen, P.J. Denny, M.S. Spencer and K.C. Waugh, Appl. Catal. 36 (1988) 1.
S.M. Francis, S. Haq, N. Xiang and M. Bowker, in preparation.
M. Bowker, P.D.A. Pudney and C.J. Barnes, J.Vac.Sci.Technol. A 8 (1990) 816.
M.A. Barteau, M. Bowker and R.J. Madix, Surf. Sci. 94 (1980) 303.
M. Bowker and R.J. Madix, Surf. Sci. 95 (1985) 195.
P.A. Redhead, Vacuum 12 (1962) 203.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Newton, M.A., Bowker, M. Direct synthesis of formate from methanol oxidation on the CuPd[85∶15]{110}p(2×1) surface: induction of a new reaction pathway via a ligand effect. Catal Lett 21, 139–148 (1993). https://doi.org/10.1007/BF00767379
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00767379