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The influence of substrate temperature on the surface chemistry of ketene on Pt(111)

✍ Scribed by P.L. Radloff; C.M. Greenlief; M.A. Henderson; G.E. Mitchell; J.M. White; C.A. Mims

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
442 KB
Volume
132
Category
Article
ISSN
0009-2614

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✦ Synopsis

Processes occurring during dosing of ketene on a heated Pt(ll1) surface were investigated using high-resolution electron energy loss spectroscopy and temperature-programmed desorption. During dosing at 400 K, CO and Hz are evolved and ethylidyne accumulates on the surface. In contrast, at 350 K a CxH,, species, not ethylidyne, is formed and some CO accumulates. It is postulated that smaIl amounts of adsorbed carbon monoxide stabilize the C&H,, species and inhibit ethylidyne formation.

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