反负载型纳米多孔金/金属氧化物催化剂的制备及其CO催化氧化性能研究

项目名称： 反负载型纳米多孔金/金属氧化物催化剂的制备及其CO催化氧化性能研究

项目编号： No.21271085

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 徐彩霞

作者单位： 济南大学

项目金额： 75万元

中文摘要： 纳米金催化剂因其优异的低温催化活性与抗潮湿能力成为新材料开发与催化应用领域的研究热点。本项目以纳米多孔金高催化活性的起因研究为指引，拟采用去合金化方法腐蚀一系列金基二元合金前驱体，通过调控去合金化条件，制备出新颖的反负载型纳米多孔金/金属氧化物催化剂。主要研究电解液的性质与浓度、腐蚀时间、温度、腐蚀电压等因素对产物结构尺寸、残留金属的化学状态及含量的影响，实现对三维空间内相互连续的反负载型纳米多孔金/金属氧化物的可控制备。研究所制备催化剂的CO催化氧化性能与微观反应动力学，系统探讨孔壁尺寸、不同残留金属氧化物及其表面含量、反应气体中水汽含量对催化性能的影响，筛选出性能优越的催化剂体系，结合理论计算分析残留金属氧化物在多孔金催化中的角色及多孔金高催化活性可能的起因。此项工作的开展将丰富多相催化领域的基础科学研究，促进新型金催化剂材料的开发与应用。

中文关键词： 纳米多孔；金催化剂；去合金化；CO氧化；反负载

英文摘要： The exploration of nanosized gold catalysts have been an intense research spot in the development of new materials due to their important applications in heterogeneous catalysis in terms of unique low-temperature catalytic activity and high moisture-tolerance. Current work is aimed at the design and exploration of novel inversely-supported gold catalysts with metal oxides supported on nanoporous gold surface with the interests on the physical origination of high catalytic activity over nanoporous gold catalysts. Upon selectively dealloying of a series of Au-based binary alloy precursors, three dimensional bicontinuous inversely-supported gold/metal oxides composites can be achieved controllable preparation by in detail exploring the effect of electrolyte property, corrosion time, temperature, and applied potential on the evolution of structure dimensions, the residual components and chemical state of the residual metals. Based on the as-made gold catalysts, we will systematically investigate their catalytic activityies towards CO oxidation and the corresponding microscopic reaction kinetics. It is interesting to study the influence of different metal oxide species, ligament size, the surface components of residued metal oxides, and the moisture in reaction gas on the catalytic performance of the as-made catalyst

英文关键词： nanoporous；dealloying；CO oxidation；gold catalyst；inversely supported