TY - JOUR
T1 - Influence of dipole interactions on surface reactions
AU - Benziger, Jay Burton
N1 - Funding Information:
Furthermore, the dipole inter-actions can be strongly attractive, resulting in the formation of condensed surfacephases, as seen in the case of formic acid decomposition of Ni(l10).The author thanks Prof. M. Boudart and R. J. Madix for their encouragement inpreparing this manuscript. He also thanks the surface reactivity group of Prof. R. J.Madix for providing the fine experimental results supporting the ideas proposed here.This work has been done under the financial support of the Natonal Science Founda-tionJ . B . BENZIGER 59l G. A. Somorjai and H. H. Farrell, Ado. Chem. Phys., 1971,20, 215.J. C. Tracy and P. W. Palmberg, J. Chem. Phys., 1969,51,4852.J. C. Tracy, J. Chem. Phys., 1972,56,2736.D. L. Adams, Surface Sci., 1974, 42, 12.C. G. Goymour and D. A. King, J.C.S. Faraduy I, 1973,69,749.D. A. King, Surface Sci., 1975, 47, 384. ' T. B. Gridey, Adu. Catalysis, 1960, 12, 1. * T. L. Einstein and J. R. Schrieffer, Phys. Rev. By 1973, 7, 3629.J. K. Roberts, Proc. Roy. SOC. A, 1935,152,445.lo J. K. Roberts, in Some Problems in Adsorption (Cambridge University Press, Cambridge, 1939).l1 I. Langmuir, J. Amev. Chem. SOC., 1932,54,2816.l2 R. Fowler and E. A. Guggenheim, in Statistical Mechanics (Cambridge University Press,l4 J. B. Benziger, E. I. KO and R J. Madix, J. Catdysis, submitted.l5 J. B. Benziger and R. J. Madix, Surface Sci., 1979,79, 394.l6 J. L. Falconer, J. G. McCarty and R. J. Madix, J. Catalysis, 1973,30,235.l7 D. H. S. Ying, Ph.D. Thesis (Stanford University, 1978).l9 J. L. Falconer, J. G. McCarty and R. J. Madix, Surface Sci., 2974,42, 329.'O D. H. S. Ying and R. J. Madix, J. Inorg. Chem., 1978,17,1103.'l I. E. Wachs and R. J. Madix, Surface Sci., 1978,76, 531.22 Handbook of Chemistry andPhysics, ed. R. C . Weast (Chemical Rubber Co., Cleveland, 1968).Cambridge, 1956).P. A. Redhead, Vacuum, 1962,12,203.J. L. Falconer and R. J. Madix, Surfme Sci., 1974,46,473.(PAPER 8/2182
PY - 1980
Y1 - 1980
N2 - Electrostatic interactions between dipoles of adsorbed molecules can influence reaction mechanism and kinetics. Repulsive interactions can increase the rate of surface reactions, whereas attractive interactions can decrease the rate of reaction because of an increased stability of the adsorbed species. With formic acid decomposition on Ni surfaces attractive dipole interactions resulted in the formation of a condensed surface phase, which decomposed with autocatalytic kinetics. The formation of the condensed phase was affected by both crystallographic structure as well as adsorption temperature by affecting the approach to an equilibrium configuration. Attractive dipole interactions also affect the orientation of molecules on a surface, thus facilitating reactions that might not otherwise occur. The formation of methyl formate from formaldehyde on a W(100)-(5 × 1)C surface has been attributed to the favourable alignment of formaldehyde molecules stemming from attractive dipole interactions.
AB - Electrostatic interactions between dipoles of adsorbed molecules can influence reaction mechanism and kinetics. Repulsive interactions can increase the rate of surface reactions, whereas attractive interactions can decrease the rate of reaction because of an increased stability of the adsorbed species. With formic acid decomposition on Ni surfaces attractive dipole interactions resulted in the formation of a condensed surface phase, which decomposed with autocatalytic kinetics. The formation of the condensed phase was affected by both crystallographic structure as well as adsorption temperature by affecting the approach to an equilibrium configuration. Attractive dipole interactions also affect the orientation of molecules on a surface, thus facilitating reactions that might not otherwise occur. The formation of methyl formate from formaldehyde on a W(100)-(5 × 1)C surface has been attributed to the favourable alignment of formaldehyde molecules stemming from attractive dipole interactions.
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U2 - 10.1039/F19807600049
DO - 10.1039/F19807600049
M3 - Article
AN - SCOPUS:37049113370
SN - 0300-9599
VL - 76
SP - 49
EP - 59
JO - Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
JF - Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
ER -