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Title: Catalytic oxidation of CO on Rh/SiO/sub 2/: a rapid-response fourier transform infrared transient study

Abstract

The catalytic oxidation of CO has been studied over Rh/SiO/sub 2/ by using a rapid transient response FTIR-mass spectrometric technique. The reactivity of linearly adsorbed CO was found to be considerably greater than that of the dicarbonyl species at both 85 and 200/sup 0/C. The frequency of linearly adsorbed CO was observed to undergo a continuous red shift during the duration of the transient, suggesting the formation of a mixed CO-oxygen adlayer. Induction times required for the formation of gas-phase CO/sub 2/ were found to be nearly 2 orders of magnitude lower than those observed for Pt/SiO/sub 2/ and Pd/SiO/sub 2/. Self-sustained CO-O/sub 2/ oscillations reinforce the greater reactivity of linearly adsorbed CO. H/sub 2/-CO-O/sub 2/ transient studies also suggest the formation of mixed hydrogen-CO adlayers. Hydrogen was observed to react with the dicarbonyl species to form a hydridocarbonyl species. The CO which is displaced by hydrogen reacts rapidly with chemisorbed oxygen to form CO/sub 2/.

Authors:
;
Publication Date:
Research Org.:
Univ. of Illinois, Chicago (USA)
OSTI Identifier:
5218007
DOE Contract Number:  
FG02-86ER13531
Resource Type:
Journal Article
Journal Name:
J. Phys. Chem.; (United States)
Additional Journal Information:
Journal Volume: 92:6
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; CARBON MONOXIDE; ADSORPTION; OXIDATION; OXYGEN; CHEMISORPTION; RHODIUM; CATALYTIC EFFECTS; SILICA; ABSORPTION SPECTROSCOPY; CATALYSIS; CATALYSTS; EXPERIMENTAL DATA; FOURIER TRANSFORM SPECTROMETERS; HIGH TEMPERATURE; INFRARED SPECTRA; MASS SPECTROSCOPY; MEDIUM TEMPERATURE; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; DATA; ELEMENTS; INFORMATION; MEASURING INSTRUMENTS; METALS; MINERALS; NONMETALS; NUMERICAL DATA; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PLATINUM METALS; SEPARATION PROCESSES; SILICON COMPOUNDS; SILICON OXIDES; SORPTION; SPECTRA; SPECTROMETERS; SPECTROSCOPY; TRANSITION ELEMENTS; 400201* - Chemical & Physicochemical Properties; 500100 - Environment, Atmospheric- Basic Studies- (-1989)

Citation Formats

Li, Y E, and Gonzalez, R D. Catalytic oxidation of CO on Rh/SiO/sub 2/: a rapid-response fourier transform infrared transient study. United States: N. p., 1988. Web. doi:10.1021/j100317a043.
Li, Y E, & Gonzalez, R D. Catalytic oxidation of CO on Rh/SiO/sub 2/: a rapid-response fourier transform infrared transient study. United States. https://doi.org/10.1021/j100317a043
Li, Y E, and Gonzalez, R D. Thu . "Catalytic oxidation of CO on Rh/SiO/sub 2/: a rapid-response fourier transform infrared transient study". United States. https://doi.org/10.1021/j100317a043.
@article{osti_5218007,
title = {Catalytic oxidation of CO on Rh/SiO/sub 2/: a rapid-response fourier transform infrared transient study},
author = {Li, Y E and Gonzalez, R D},
abstractNote = {The catalytic oxidation of CO has been studied over Rh/SiO/sub 2/ by using a rapid transient response FTIR-mass spectrometric technique. The reactivity of linearly adsorbed CO was found to be considerably greater than that of the dicarbonyl species at both 85 and 200/sup 0/C. The frequency of linearly adsorbed CO was observed to undergo a continuous red shift during the duration of the transient, suggesting the formation of a mixed CO-oxygen adlayer. Induction times required for the formation of gas-phase CO/sub 2/ were found to be nearly 2 orders of magnitude lower than those observed for Pt/SiO/sub 2/ and Pd/SiO/sub 2/. Self-sustained CO-O/sub 2/ oscillations reinforce the greater reactivity of linearly adsorbed CO. H/sub 2/-CO-O/sub 2/ transient studies also suggest the formation of mixed hydrogen-CO adlayers. Hydrogen was observed to react with the dicarbonyl species to form a hydridocarbonyl species. The CO which is displaced by hydrogen reacts rapidly with chemisorbed oxygen to form CO/sub 2/.},
doi = {10.1021/j100317a043},
url = {https://www.osti.gov/biblio/5218007}, journal = {J. Phys. Chem.; (United States)},
number = ,
volume = 92:6,
place = {United States},
year = {1988},
month = {3}
}