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Insight into the Mechanism of the Preferential Oxidation of Carbon Monoxide by Using Isotope-Modulated Excitation IR Spectroscopy

Authors

  • Dr. Nobutaka Maeda,

    Corresponding author
    1. Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, HCI, Zurich CH-8097 (Switzerland)
    2. Current address: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024 (China)
    • Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, HCI, Zurich CH-8097 (Switzerland)
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  • Fabian Meemken,

    1. Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, HCI, Zurich CH-8097 (Switzerland)
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  • Prof. Dr. Alfons Baiker

    Corresponding author
    1. Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, HCI, Zurich CH-8097 (Switzerland)
    2. Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589 (Saudi Arabia)
    • Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Hönggerberg, HCI, Zurich CH-8097 (Switzerland)
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Abstract

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DRIFTing through time: Modulation excitation in situ diffuse-reflectance IR Fourier transform (DRIFT) spectroscopy with periodic isotopic perturbation (D2 and 13CO) has been applied to elucidate the pathway for the preferential oxidation of carbon monoxide (PROX) over a commercial Pt/alumina catalyst. The time- and phase-domain IR spectra suggest a water-assisted pathway for the preferential oxidation reaction.

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