Gold Supported on Metal Oxides for Carbon Monoxide Oxidation

作     者：Sonia A. C. Carabineiro Nina Bogdanchikova Miguel Avalos-Borja Alexey Pestryakov Pedro B. Tavares Jose L. Figueiredo 

作者机构：Laboratário de Catálise e Materiais Associate Laboratory LSRE/LCM Departamento de Engenharia Química Faculdade de Engenharia Universidade do Porto 4200-465 Porto Portugal Universidad Nacional Autónoma de México Centro de Nanociencias y Nanotecnologia Carretera Tijuana-Ensenada 22800 Ensenada Baja California México Tomsk Polytechnic University 30 Lenin Avenue Tomsk 634050 Russia Universidade de Trás-os-Montes e Alto Douro Centro de Quimica-Vila Real Departamento de Química 5001-911 Vila Real Portugal 

基　　金：Mexican Consejo Nacional de Ciencia y Tecnologia PAPIT-UNAM, (IN 100908) Fundo Regional para a Ciência e Tecnologia, FRCT Fundação para a Ciência e a Tecnologia, FCT, (PTDC/EQU-ERQ/101456/2008) Fundação para a Ciência e a Tecnologia, FCT Consejo Nacional de Ciencia y Tecnología, CONACYT, (79062) Consejo Nacional de Ciencia y Tecnología, CONACYT European Regional Development Fund, FEDER 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2011年第4卷第2期

页      码：180-193页

摘      要：Au has been loaded （1% wt.） on different commercial oxide supports （CuO, La2O3, Y2O3, NiO） by three different methods： double impregnation （DIM）, liquid-phase reductive deposition （LPRD）, and ultrasonication （US）. Samples were characterised by N2 adsorption at -196℃, high-resolution transmission electron microscopy, selected area electron diffraction, energy dispersive X-ray spectrometry, high-angle annular dark-field imaging （Z-contrast）, X-ray diffraction, and temperature programmed reduction. CO oxidation was used as a test reaction to compare the catalytic activities. The best results were obtained with Au loaded by DIM on the NiO support, with an activity of 7.2 × 10^（-4） molco·gAu^（-1）·s^（-1） at room temperature. This is most likely related to the Au nanoparticle size being the smallest in this catalyst （average 4.8 nm）, since it is well known that gold particle size determines the catalytic activity. Other samples, having larger Au particle sizes （in the 2-12 nm range, with average sizes ranging from 4.8 to 6.8 nm）, showed lower activities. Nevertheless, all samples prepared by DIM had activities （from 1.1 × 10^（-4） to 7.2 × 10^（-4） molco·gAu^（-1）·S^（-1）, at room temperature） above those reported in the literature for gold on similar oxide supports. Therefore, this method gives better results than the most usual methods of deposition-precipitation or co-precipitation.

主 题 词：Gold heterogeneous catalysis oxidation electron diffraction X-ray diffraction 

学科分类：081704[081704] 0808[工学-自动化类] 080803[080803] 07[理学] 070304[070304] 08[工学] 0817[工学-轻工类] 0703[理学-化学类] 

核心收录：

D　O　I：10.1007/s12274-010-0068-7

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