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Published May 1985 | Published
Journal Article Open

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

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.

Additional Information

© 1985 American Vacuum Society. Received 29 October 1984; accepted 4 December 1984. Supported by the National Science Foundation under Grant No. CHE82-06487.

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