PREPARATION OF Au/SULFONATED POLYSTYRENE CATALYSTS FOR LOW-TEMPERATURE CO OXIDATION* |
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Authors: | Shi-hua Wu Xiu-cheng Zheng Wei-ping Huang Shou-min Zhang Wei Wei |
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Affiliation: | Department of Chemistry; Nankai University Tianjin 300071; China |
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Abstract: | Supported An catalysts for low-temperature CO oxidation were prepared by solvated motal atom impregnation(SMAI) and conventional impregnation (CI). X-ray photoelectron spectroscopy (XPS) investigations indicated that theelemental gold in all the samples was in the metallic state. XRD measurements showed that the mean diameters of Auparticles prepared by SMAI were smaller than those prepared by CI with the same gold content. Catalytic tests showed thatthe SMAI catalyst had higher CO oxidation activity than the CI catalyst with the same compositions. Both SMAI and CIcatalysts exhibited high activity in low temperature CO oxidation. Full CO conversion was obtained at 323--383K. |
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Keywords: | CO oxidation Gold catalysts Solvated metal atom impregnations Conventional impregnation Sulfonated polystyrene |
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