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Mechanism and Active Sites of the Oxidation of CO over Au/TiO2

Authors

  • Dr. Tadahiro Fujitani,

    Corresponding author
    1. Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569 (Japan)
    2. Japan Science and Technology Agency (JST), CREST, 4-1-8 Hon-cho, Kawaguchi, Saitama 332-0012 (Japan)
    • Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569 (Japan)
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  • Dr. Isao Nakamura

    1. Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569 (Japan)
    2. Japan Science and Technology Agency (JST), CREST, 4-1-8 Hon-cho, Kawaguchi, Saitama 332-0012 (Japan)
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  • We are grateful to Prof. M. Haruta at Tokyo Metropolitan University for his constructive discussions.

Abstract

original image

At low reaction temperatures (<320 K), moisture plays an essential role in promoting the oxidation of CO over Au/TiO2(110) surfaces, whereas at high temperatures (>320 K), such promotional effect is not observed, suggesting that the mechanism and active sites of the reaction change with the reaction temperature (see picture; rmath image=rate of CO2 formation and pmath image=pressure of H2O).

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