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In situ FTIR study on the formation and adsorption of CO on alumina-supported noble metal catalysts from H2 and CO2 in the presence of water vapor at high pressures

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Title: In situ FTIR study on the formation and adsorption of CO on alumina-supported noble metal catalysts from H2 and CO2 in the presence of water vapor at high pressures
Authors: Yoshida, Hiroshi Browse this author →KAKEN DB
Narisawa, Satomi Browse this author
Fujita, Shin-ichiro Browse this author →KAKEN DB
Liu, Ruixia Browse this author
Arai, Masahiko Browse this author →KAKEN DB
Issue Date: 14-Apr-2012
Publisher: Royal Society of Chemistry
Journal Title: Physical Chemistry Chemical Physics
Volume: 14
Issue: 14
Start Page: 4724
End Page: 4733
Publisher DOI: 10.1039/c2cp23590k
PMID: 22395771
Abstract: The formation and adsorption of CO from CO2 and H2 at high pressures were studied over alumina-supported noble metal catalysts (Pt, Pd, Rh, Ru) by in situ FTIR measurements. To examine the effects of surface structure of supported metal particles and water vapor on the CO adsorption, FTIR spectra were collected at 323 K with untreated and heat (673 K) treated catalysts in the absence and presence of water (H2O, D2O). It was observed that the adsorption of CO occurred on all the metal catalysts at high pressures, some CO species still remained adsorbed under ambient conditions after the high pressure FTIR measurements, and the frequencies of the adsorbed CO species were lower either for the heat treated samples or in the presence of water vapor. It is assumed that the CO absorption bands on atomically smoother surfaces appear at lower frequencies and that water molecules are adsorbed more preferentially on atomically rough surfaces rather than CO species.
Rights: Phys. Chem. Chem. Phys., 2012,14, 4724-4733 - Reproduced by permission of the PCCP Owner Societies
Type: article (author version)
URI: http://hdl.handle.net/2115/51998
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 荒井 正彦

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