TEMPERATURE-PROGRAMMED DESORPTION STUDY OF ETHYLENE ON A CLEAN, A H-COVERED, AND AN O-COVERED Pt(111) SURFACE.

P. Berlowitz, C. Megiris, J. B. Butt, Harold H Kung

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

On the clean surface, ethylene is first converted to ethylidyne and then is decomposed in steps eventually into a surface carbonaceous species, releasing hydrogen in each of the steps. It can also be hydrogenated to ethane when adsorbed H is available. The rate of hydrogenation, however, is slower than the hydrogenation of ethylene on a Pt atom with preadsorbed H. In the presence of preadsorbed O, ethylene is oxidized to CO//2, H//2O, and CO via an intermediate that has a carbon-hydrogen stoichiometry of CH. The oxidation reaction takes place at the perimeter of the oxygen islands. The results suggest that decomposition, hydrogenation, and oxidation are independent pathways that can take place simultaneously depending on the availability of adsorbed H or O.

Original languageEnglish
Pages (from-to)206-212
Number of pages7
JournalLangmuir
Volume1
Issue number2
Publication statusPublished - Mar 1985

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Temperature programmed desorption
Hydrogenation
hydrogenation
Ethylene
ethylene
desorption
Carbon Monoxide
Hydrogen
Oxidation
oxidation
Ethane
releasing
hydrogen
Stoichiometry
ethane
availability
temperature
stoichiometry
Carbon
Availability

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

TEMPERATURE-PROGRAMMED DESORPTION STUDY OF ETHYLENE ON A CLEAN, A H-COVERED, AND AN O-COVERED Pt(111) SURFACE. / Berlowitz, P.; Megiris, C.; Butt, J. B.; Kung, Harold H.

In: Langmuir, Vol. 1, No. 2, 03.1985, p. 206-212.

Research output: Contribution to journalArticle

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