An Au-Cu Bimetal Catalyst Supported on Mesoporous TiO2 with Stable Catalytic Performance in CO Oxidation

• 作者: LI Licheng, WANG Changsong, MA Xuanxuan, YANG Zhuhong*, LU Xiaohua
• 来源期刊: 催化学报
• 学科: 化学
• 关键词: gold copper mesoporous titania stability carbon monoxide oxidation
• 年，卷（期）: 2012,（11）
• 页码范围: 1778-1782
• 分类号: O643|TQ42
• 语种: 中文
• DOI: 10.1016/S1872-2067(11)60471-3

摘要

An Au-Cu bimetal catalyst was prepared by deposition-precipitation (urea) of gold and copper species on mesoporous TiO2 and activation with H2. The sample was characterized by N2 adsorption/desorption, X-ray diffraction, ultraviolet-visible spectroscopy, and high-resolution transmission electron microscopy. The results showed that the Au and Cu species formed an Au-Cu alloy and were well dis-persed on the mesoporous TiO2. According to CO oxidation test results, it was found that the catalytic activity of gold was enhanced by cop-per. The Au-Cu bimetal catalyst supported on mesoporous TiO2 showed better catalytic stability in CO oxidation than the Au catalyst sup-ported on mesoporous TiO2 and the nonporous TiO2-supported catalysts. This may be related to the effects of both Au-Cu alloying and the mesostructure of TiO2.