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

被引：19

作者：

Li Licheng ^{[1
]}

Wang Changsong ^{[1
]}

Ma Xuanxuan ^{[1
]}

Yang Zhuhong ^{[1
]}

Lu Xiaohua ^{[1
]}

机构：

[1] Nanjing Univ Technol, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Jiangsu, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2012年 / 33卷 / 11期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

gold; copper; mesoporous titania; stability; carbon monoxide; oxidation; THERMAL-STABILITY; GOLD NANOPARTICLES; POTASSIUM DITITANATE; LAYER DEPOSITION; FIBROUS TITANIA; CARBON-MONOXIDE; NANOCLUSTERS; HYDROGEN; AU/TIO2; SIZE;

D O I：

10.1016/S1872-2067(11)60471-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

An Au-Cu bimetal catalyst was prepared by deposition-precipitation (urea) of gold and copper species on mesoporous TiO2 and activation with H-2. The sample was characterized by N-2 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 dispersed on the mesoporous TiO2. According to CO oxidation test results, it was found that the catalytic activity of gold was enhanced by copper. The Au-Cu bimetal catalyst supported on mesoporous TiO2 showed better catalytic stability in CO oxidation than the Au catalyst supported 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.

引用

页码：1778 / 1782

页数：5

共 19 条

[1] The role of pore size and structure on the thermal stability of gold nanoparticles within mesoporous silica [J].