The internal energy of CO2 produced from catalytic oxidation of CO by NO

Autor:	Steven L. Bernasek, Daniel J. Bald
Rok vydání:	1998
Předmět:	Absorption spectroscopy Internal energy Analytical chemistry General Physics and Astronomy chemistry.chemical_element Oxygen Catalysis chemistry Catalytic oxidation Normal mode Physics::Chemical Physics Physical and Theoretical Chemistry Platinum Excitation
Zdroj:	The Journal of Chemical Physics. 109:746-752
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.476613
Popis:	Internal energy distributions for CO2 produced in the catalytic oxidation of CO by NO on polycrystalline platinum have been directly measured using a high-resolution tunable diode laser spectrometer. Absorption spectra have been collected for CO2 produced in a flow cell reactor as a function of surface temperature and reactant ratio. Vibrational excitation of the product CO2 is observed for all reaction conditions. The vibrational energy of the asymmetric stretching mode is higher than the bending and symmetric stretching modes. The level of vibrational excitation for all normal modes is sensitive to the NO:CO ratio. The observed internal energy distribution of the product CO2 is compared to that of CO2 produced from CO oxidation by O2, using the same method. The similarities in the vibrational excitation and its dependence upon oxygen coverage suggest that the transition state for the CO2 formation step is the same for both the CO+NO and CO+O2 catalytic oxidation reactions. This similarity of likely tran...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f10e8b3ead6bc2ecd4d1f4dc6ee43555 https://doi.org/10.1063/1.476613 Zobrazit plný text záznamu