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Citation: ZHANG Rongbin, YAO Liujing, ZHANG Ning, XU Xiaoyan, WANG Liang, JU Yan. CO Oxidation over Au Catalysts Supported on Acid-activated Bentontie[J]. Chinese Journal of Applied Chemistry, ;2012, 29(8): 926-932. doi: 10.3724/SP.J.1095.2012.000072 shu

CO Oxidation over Au Catalysts Supported on Acid-activated Bentontie

1.
Department of Chemistry, University of Nanchang, Nanchang 330031, China

Corresponding author: ZHANG Rongbin,
Received Date: 22 February 2011
Available Online: 13 May 2011
Fund Project: 国家自然科学基金(20763005,21166018) (20763005,21166018)江西省自然科学基金(2010GZH0100) (2010GZH0100)江西省教育厅基金(GJJ10291)资助项目 (GJJ10291)

Acidification by HCl or H₂SO₄ was applied for modifying bentonite.The Au catalysts supported on acid-activated bentonite had been prepared by the methods of aqueous impregnation,deposition-precipitation and cationic absorption.CO oxidation was used as a probe reaction to characterize the catalytic performance.The samples were characterized by BET,XRD and TEM.The BET results showed that the surface area and pore volume had a substantial improvement.The results of CO oxidation showed that a higher catalyst activity was achieved by Au supported on H₂SO₄ acidified bentontie.The calculation result by XRD indicated that the Au particles supported on H₂SO₄ acidified bentontie had smaller size.Small Au particles could be obtained by the method of cationic absorption.Au catalysts with higher catalytic activity could be obtained by the conditions of adsorption for 48 h,calcination at 450℃ and H₂ reduction at 150℃.
- acid-activated bentontie,
- Au catalysts,
- CO oxidation
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