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Your search keyword '"Szuromi P"' showing total 5 results
Start Over Author "Szuromi P" Publisher american vacuum society
5 results on '"Szuromi P"'

1. Comparative studies of alkane activation by low-index surfaces of iridium and platinum

Author

Szuromi, P. D., Engstrom, J. R., Wittrig, T. S., and Weinberg, W. H.

Abstract

The interaction of alkanes with low-index surfaces of iridium at low temperatures and pressures has been studied in our laboratory by thermal desorption mass spectrometry and low-energy electron diffraction. While the reconstructed (110)-(1 × 2) surface of iridium initiates dissociative chemisorption of ethane and all higher alkanes at 125 K in the low coverage limit, similar reactions with the close-packed (111) surface occur readily only at defect sites. Thus, surface geometry influences strongly the activation barriers to C-H bond scission in alkanes on iridium surfaces.

Published
1985

2. Summary Abstract: The reaction of saturated and unsaturated hydrocarbons with single crystalline surfaces of iridium

Author

Szuromi, P. D., Weinberg, W. H., Szuromi, P. D., and Weinberg, W. H.

Abstract

When studying the reactions of hydrocarbon molecules on transition metal surfaces, it is valuable to find similarities in the reaction chemistry of molecules which vary widely in structure. Such similarities are then characteristic of the surface and of the resulting surface species. Here, the reactions of several hydrocarbon molecules on the reconstructed Ir(110)-(1x2) surface and on the close-packed Ir(111) surface are considered. The Ir(110)-(1x2) surface has been shown to reconstruct by a missing row model in which every other row of surface atoms in the [001] crystallographic direction are absent [1]. The surface can be pictured as a series of two-layer deep troughs, the sides of which are (111) microfacets.

Published
1983

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