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Infrared spectroscopic study on the reaction mechanism of CO hydrogenation over Pd/CeO2

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Abstract

In situ infrared spectroscopy was applied to elucidate the reaction mechanism of CO hydrogenation over Pd/CeO2. Instead of direct dissociation of CO, a new reaction pathway is proposed for methane formation, involving geminal dicarbonyl intermediates and (HCO)2(a) intermediates, which may be located on the surface of Pd covered with thin layers of reduced ceria (SMSI effect). Transformation of methane formation sites into methanol formation ones by the oxidation with water vapor formed during the CO−H2 reaction is proposed, which may be located on the Pd (111) planes adjacent to ceria support.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1, Rokkakubashi, 221-8686, Kanagawa, Yokohama, Japan

    Shuichi Naito, Shigeru Aida, Toshiki Kasahara & Toshihiro Miyao

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  1. Shuichi Naito
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  2. Shigeru Aida
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  3. Toshiki Kasahara
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  4. Toshihiro Miyao
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Correspondence to Shuichi Naito.

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Naito, S., Aida, S., Kasahara, T. et al. Infrared spectroscopic study on the reaction mechanism of CO hydrogenation over Pd/CeO2 . Res. Chem. Intermed. 32, 279–290 (2006). https://doi.org/10.1163/156856706777346444

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  • DOI: https://doi.org/10.1163/156856706777346444

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