The dynamics of CO oxidation on Pt deduced from translational, rotational and vibrational excitation in product CO2

Autor:	S. B. Ryali, Gary L. Haller, K. Kunimori, D. A. Mantell, J. B. Fenn
Rok vydání:	1986
Předmět:	Internal energy Chemistry Infrared Analytical chemistry Infrared spectroscopy Surfaces and Interfaces Condensed Matter Physics Molecular physics Surfaces Coatings and Films symbols.namesake Fourier transform Boltzmann constant symbols Materials Chemistry Molecule Emission spectrum Excitation
Zdroj:	Surface Science. 172:281-302
ISSN:	0039-6028
DOI:	10.1016/0039-6028(86)90755-7
Popis:	Internal energy distributions in the CO2 product of CO oxidation on a Pt surface have been measured using Fourier transform infrared emission spectroscopy. The analysis reveals that the distribution of states within any given mode is Boltzmann but that each mode is characterized by its own temperature. In order to observe the effects of coverage on the product energy distributions, the results for different surface temperature are compared. This comparison reveals that a given increase in surface temperature causes a much larger increase in symmetric stretch temperature. A simultaneous reduction in the translational energy is postulated. Simplified trajectory calculations in light of the experimental results suggest that the transition state comprises a CO2 molecule standing nearly vertical and slightly bent as it is formed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3003be19b27db16e73ac0879c5f4ea3c https://doi.org/10.1016/0039-6028(86)90755-7 Zobrazit plný text záznamu