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Adsorption of hydrogen on reduced copper chromite

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Abstract

Temperature programmed desorption and volumetric methods in static conditions were used to study hydrogen adsorption on the surface of metallic copper particles produced by the partial reduction of copper chromite CuCr2O4 with hydrogen. In the temperature range 300-573 K and in the range of medium surface coverages by hydrogen, the main state of adsorbed hydrogen reveals the heat of adsorption q= 78 kJ/mol and activation energy of adsorption E a = 69 kJ/mol. In the temperature range 77-300 K, an adsorption state with lower heat and activation energy was found, indicating a non-uniformity of the copper surface within ca. 8% of the total number of surface sites.

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia

    I. I. Simentsova, L. P. Davydova, A. V. Khasin & T. M. Yurieva

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  1. I. I. Simentsova
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  2. L. P. Davydova
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  3. A. V. Khasin
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  4. T. M. Yurieva
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Simentsova, I.I., Davydova, L.P., Khasin, A.V. et al. Adsorption of hydrogen on reduced copper chromite. Reaction Kinetics and Catalysis Letters 79, 85–92 (2003). https://doi.org/10.1023/A:1024159717910

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