石墨烯负载纳米Co基催化剂的可控制备与催化性能

项目名称： 石墨烯负载纳米Co基催化剂的可控制备与催化性能

项目编号： No.11464051

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 廖清

作者单位： 贺州学院

项目金额： 34万元

中文摘要： 石墨烯材料具有很多优异的物理和化学性能，是纳米材料领域的一大研究热点。石墨烯基纳米材料不但可以同时保持石墨烯和纳米粒子的固有特性，而且能够产生新颖的协同效应，在传感器、储氢材料、电极材料和催化等领域具有广阔的应用前景。但石墨烯与纳米粒子间的协同催化机理仍不清楚。本项目将通过石墨烯负载钴基纳米材料的可控制备，选择汽车尾气CO的催化氧化反应为模型反应，检验催化剂的活性。研究纳米粒子覆盖度、形貌和表面结构对催化剂性能的影响。采用第一性原理理论计算结合其他实验手段，分析石墨烯与纳米粒子间的电子传递及协同催化机制。研究催化剂的电子性质与催化反应的关系，认识表面效应、量子效应、界面效应对催化的作用。促进催化理论的发展，为实现石墨烯基纳米材料在催化方面的大规模应用提供理论与实验依据。

中文关键词： 石墨烯；纳米结构；异质结构；催化；钴

英文摘要： Owing to its novel and unique physical and chemical properties, the graphene based material has been attracting more and more attention from scientific. The nanocomposites exhibit excellent properties and improved functionalities due to the synergetic effects between graphene and the components, thus have been widely used in the fields of catalysis, energy, analytical, biotechnology and pollutants removal applications. However, little is known about synergetic coupling effects between the components and graphene. The project will controllable synthesis cobalt-based nanocrystals grown on graphene as a catalyst for CO oxidation reaction. We will investigate the effects of the coverage, morphology, surface structure on the CO oxidation activity. The first-principles theoretical calculation combined with other experimental methods could be carried out to analyze the electron transfer and the synergetic catalytic effects between grahpene and cobalt-based nanostructures. Relationships between the electronic structure and the catalytic reaction are investigated to understand the role of surface effects, quantum effects, interface effects on catalysis. These results should be helpful in promoting the development of catalytic theory and providing theoretical and experimental basis for the large-scale application of graphene-based materials in catalysis.

英文关键词： graphene;nanostructure;Heterostructure;catalysis;cobalt