氧化锰纳米催化剂的晶型效应和形貌效应研究

项目名称： 氧化锰纳米催化剂的晶型效应和形貌效应研究

项目编号： No.21306026

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 化学工业

项目作者： 孙明

作者单位： 广东工业大学

项目金额： 25万元

中文摘要： 纳米材料具有特殊的晶型和形貌效应，纳米材料形貌的调控已成为纳米催化领域的研究热点。但对氧化锰的晶型效应和形貌效应进行系统研究的论文尚不多见,少量发表的在电化学和催化化学领域的研究结论迥异，相互之间存在矛盾。在前期对氧化锰晶型转化和性能调控的基础上，本项目拟从催化角度对其晶型和形貌效应进行研究。拟以简单的方法，从热力学和动力学控制入手，制备不同晶型的氧化锰如α、β、δ、γ等晶型，以二甲醚催化燃烧为探针反应，考察晶型效应，建立氧化锰的晶型与其催化活性之间的关系；在此基础上，选定特定晶型的氧化锰，通过制备参数的调变，得到不同形貌或者不同暴露晶面的氧化锰，建立某特定晶型的不同形貌或者暴露晶面与二甲醚催化燃烧反应活性的关系。进一步利用形貌效应，构筑负载Ag或Pd的复合纳米材料，研究金属离子在特定晶面的落位。本项目的研究可以加深对催化剂构效关系的认知，而且对实用高效催化剂的开发也具有重要的理论价值。

中文关键词： 氧化锰；晶型效应；形貌效应；催化性能；构效关系

英文摘要： Nanomaterials have special crstalline-dependent and morphology-dependent effect. The tune of the nanomaterial's shape is becoming a hot issue in heterogeneous catalysis. However, the systemic study on the crystalline- and morphology-dependent effect of manganese oxide is rarely reported. The conclusions of limited reports of manganese oxide in the field of electrocatalytic and catalytic appllication are self-contradictory. Based on our precious study on the controllable synthesis and fine tuning of manganese oxide, in this project, we aim to evaluate the crystalline- and shape-dependent effect of manganese oxide in details. The first part is to synthesize manganese oxides with different crystal structure such as α、β、δ and γ phase by an easy and economic hydro-thermal method from the aspesct of thermaldynatic and kinetic controlling, and to study the relationship of manganese oxide's structure and the catalytic combustion activity for dimethyl ether (DME). The second part is to synthesize manganese oxides of one definite crystal phase with different morphology or various exposed crystal facets, and to explore the relationship of manganese oxide's shape and the catalytic performance for DME combustion. The last part is to fabricate novel Ag or Pd loaded manganese oxides sytstem by using the concept of morphology-

英文关键词： manganese oxides；Crystalline-dependent activity；Morphology-dependent activity；catalytic activity；Structure-activity relationship