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Relationship between oxidation states of copper supported on alumina and activities for catalytic combustion of NH3

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Abstract

The relationship between the oxidation state of Cu supported on an alumina catalyst (Cu/Al2O3) and the activity for combustion of NH3 was investigated. Combustion of NH3 on the catalyst treated in hydrogen at 800°C occurred at lower temperature than on the catalyst treated in air. It was also much better than Pt and Rh catalysts for the conversion of NH3 to N2. Characteristics of the catalyst were investigated by XRD, XPS, and the N2O pulse injection method to understand the reason of its high catalytic activity. The reason of the high activity of the catalyst treated in hydrogen at the high temperature was attributed to the lower oxidation state of Cu in the catalyst.

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Authors and Affiliations

  1. Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Sakyo‐ku, Kyoto, 606‐8501, Japan

    Yukiyoshi Ono & Tomoyuki Inui

  2. Human Environmental Systems Developments Center, Matsushita Electric Industrial Co. Ltd., 3‐1‐1, Yagumo‐nakamachi, Moriguchi, Osaka, 570‐8501, Japan

    Hidenobu Wakita

Authors
  1. Yukiyoshi Ono
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  2. Hidenobu Wakita
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  3. Tomoyuki Inui
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Ono, Y., Wakita, H. & Inui, T. Relationship between oxidation states of copper supported on alumina and activities for catalytic combustion of NH3 . Catalysis Letters 53, 83–89 (1998). https://doi.org/10.1023/A:1019085217913

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  • DOI: https://doi.org/10.1023/A:1019085217913

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