The dynamics of CO oxidation on Pd, Rh, and Pt studied by high-resolution infrared chemiluminescence spectroscopy

Article abstract of DOI:10.1063/1.461505

The dynamics of carbon monoxide oxidation on Pd, Rh, and Pt foils were probed under nearly collision-free conditions using high resolution infrared chemiluminescence.Auger electron spectroscopy was used to verify the absence of impurities on the surfaces.The reactants were supplied to the surface through a free jet nozzle source, while a Fourier transform infrared spectrometer operating at 0.012 cm^-1 resolution was used to fully resolve the rotational structure of several vibrational transitions in the product CO2 (22 in the case of Pd).In all cases, the product CO2 is vibrationally excited and the apparent vibrational temperatures are in the same order as the peak reaction rates, i.e., Pd > Pt > Rh.The surface coverage of oxygen on Pd was varied by changing the CO:O2 ratio and the surface temperatures and, in both cases, increasing oxygen coverage causes an increase in vibrational excitation of product CO2.On Pt and Rh, the apparent temperatures of different vibrational modes are similar, while on Pd, those levels involved in Fermi resonances that are traditionally called the symmetric stretch levels are selectively populated.From these results, evidence that the activated complex is bent on Pd relative to Pt and Rh and, in all cases, is aligned more or less along the surface normal is presented.

Full text of DOI:10.1063/1.461505

The dynamics of CO oxidation on Pd, Rh, and Pt studied by highresolution infrared
chemiluminescence spectroscopy
George W. Coulston and Gary L. Haller
Citation: The Journal of Chemical Physics 95, 6932 (1991); doi: 10.1063/1.461505
View online: http://dx.doi.org/10.1063/1.461505
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/95/9?ver=pdfcov
Published by the AIP Publishing
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
137.189.170.231 On: Sat, 20 Dec 2014 19:13:20