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KMID : 1059519880320060543
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Journal of the Korean Chemical Society
1988 Volume.32 No. 6 p.543 ~ p.548
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Metal-Support Interaction in Cu /γ-Al2O3 and Cu / TiO2 Systems
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Ju Mi-Kyeong
Han Chong-Soo
Cho Min-Soo
Lee Kye-Soo
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Abstract
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The metal-support interaction was studied in 1∼5wt% copper supported on γ-alumina and titania systems by temperature programmed reduction (TPR) and EPR. When the samples were treated with oxygen at 500℃, the relative area of H2-TPR peak at higher temperature increased with copper content for titania system whereas that of lower temperature increased for γ-alumina system. After oxygen treatment at 300℃, γ-alumina system showed a TPR peak at 90℃ while two peaks at 120 and 180℃ were found in titania system. A typical Cu2+ EPR signal was observed on γ-alumina but very broad and small one on titania. From the results, it was suggested that the metal-support interaction increases in the order of silica < titania < γ-alumina and copper oxide has different loading characteristics depending on the supports.
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KEYWORD
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