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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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タイトル: 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
著者: Yoshida, Hiroshi 著作を一覧する
Narisawa, Satomi 著作を一覧する
Fujita, Shin-ichiro 著作を一覧する
Liu, Ruixia 著作を一覧する
Arai, Masahiko 著作を一覧する
発行日: 2012年 4月14日
出版者: Royal Society of Chemistry
誌名: Physical Chemistry Chemical Physics
巻: 14
号: 14
開始ページ: 4724
終了ページ: 4733
出版社 DOI: 10.1039/c2cp23590k
抄録: 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
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/51998
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 荒井 正彦

 

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