Adsorption of hydrogen on reduced copper chromite |
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Authors: | I I Simentsova L P Davydova A V Khasin and T M Yurieva |
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Institution: | (1) Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia |
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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.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | copper chromite hydrogen adsorption |
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