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Arrested Formation of Carbon Oxides in Programmed Oxidation of Methane on Nonstoichiometric Samaria

Colussi, A. J. and Amorebieta, V. T. (1995) Arrested Formation of Carbon Oxides in Programmed Oxidation of Methane on Nonstoichiometric Samaria. Journal of Physical Chemistry, 99 (38). pp. 13921-13925. ISSN 0022-3654. doi:10.1021/j100038a025. https://resolver.caltech.edu/CaltechAUTHORS:20150623-154804125

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Abstract

CO_x species evolved during transient exposure of Sm_2O_3 catalysts to very low pressure CH_4/O_2 mixtures are monitored in real time by molecular beam mass spectrometry at 1100 K. The rise of m/z = 28 and 44 signals is significantly delayed relative to the onset of CH_4 decay only on substoichiometric Sm_2O_(3-γ) samples. This observation rules out CO and CO_2 as primary products of methane heterogeneous oxidation and implies that their immediate precursor, most probably CH_3(g), is slowly oxidized during the initial stages of Sm_2O_(3-γ) surface reconstruction. Present results suggest the possibility of suppressing carbon oxides in the oxidative dimerization of methane by dynamic control of selective site populations.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/j100038a025DOIArticle
http://pubs.acs.org/doi/abs/10.1021/j100038a025PublisherArticle
ORCID:
AuthorORCID
Colussi, A. J.0000-0002-3400-4101
Additional Information:© 1995 American Chemical Society. Received: February 24, 1995; In Final Form: June 5, 1995. This project was financially supported by CONICET-Argentina, under grant PID-1131/91.
Funders:
Funding AgencyGrant Number
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)PID-1131/91
Issue or Number:38
DOI:10.1021/j100038a025
Record Number:CaltechAUTHORS:20150623-154804125
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150623-154804125
Official Citation:Arrested Formation of Carbon Oxides in Programmed Oxidation of Methane on Nonstoichiometric Samaria A. J. Colussi and V. T. Amorebieta The Journal of Physical Chemistry 1995 99 (38), 13921-13925 DOI: 10.1021/j100038a025
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58507
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:26 Jun 2015 15:07
Last Modified:10 Nov 2021 22:06

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