| Autor: |
Muetterties EL; Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720., Tasi MC, Kelemen SR |
| Jazyk: |
angličtina |
| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 1981 Nov; Vol. 78 (11), pp. 6571-5. |
| DOI: |
10.1073/pnas.78.11.6571 |
| Abstrakt: |
An ultra-high vacuum experimental study of acetylene chemisorption on Pt(111) and Pt(100) and of the reaction of hydrogen with the acetylene adsorbate has established distinguishing features of carbon-hydrogen bond breaking and making processes as a function of pressure, temperature, and surface crystallography. The rates for both processes are substantially higher on the Pt(100) surface. Net acetylene-hydrogen processes, in the temperature range of 20 degrees C to approximately 130 degrees C, are distinctly different on the two surfaces: on Pt(100) the net reaction is hydrogen exchange ((1)H-(2)H exchange) and on Pt(111) the only detectable reaction is hydrogenation. Stereochemical differences in the acetylene adsorbate structure are considered to be a contributing factor to the differences in acetylene chemistry on these two surfaces. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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