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The study of the active surface for CO oxidation over supported Pd catalysts

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Abstract

CO oxidation was investigated on various powder oxide supported Pd catalysts by temperature-programmed reaction. The pre-reduced catalysts show significantly higher activities than the pre-oxidized ones. Model studies were performed to better understand the oxidation state, reactivities and stabilities of partially oxidized Pd surfaces under CO oxidation reaction conditions using an in situ infrared reflection absorption spectrometer (IRAS). Three O/Pd(100) model surfaces, chemisorbed oxygen covered surface, surface oxide and bulk-like surface oxide, were prepared and characterized by low-energy electron diffraction (LEED) and Auger electron spectroscopy (AES). The present work demonstrates that the oxidized palladium surface is less active for CO oxidation than the metallic surface, and is unstable under the reaction conditions with sufficient CO.

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Authors and Affiliations

  1. State Key Laboratory of Physical Chemistry of Solid Surfaces; National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters; Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China

    Xuefei Weng, Xiang Yuan, Huan Li, Xiaokun Li, Mingshu Chen & Huilin Wan

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  1. Xuefei Weng
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  2. Xiang Yuan
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  3. Huan Li
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  4. Xiaokun Li
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  5. Mingshu Chen
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  6. Huilin Wan
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Correspondence to Mingshu Chen.

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Weng, X., Yuan, X., Li, H. et al. The study of the active surface for CO oxidation over supported Pd catalysts. Sci. China Chem. 58, 174–179 (2015). https://doi.org/10.1007/s11426-014-5277-6

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  • DOI: https://doi.org/10.1007/s11426-014-5277-6

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