贵金属/石墨烯模型催化剂的原位ALD制备与表征

石墨烯负载贵金属催化剂在能源催化领用应用广泛，然而该体系催化活性位的鉴定大多依赖理论计算。本项目拟借助真空互联技术，将等离子体处理技术和CVD方法与超高真空STM、XPS等表征相结合，在不暴露大气的的条件下，制备出缺陷位性质与密度以及掺杂模式可控的模型石墨烯载体，通过ALD方法调控贵金属元素落位及颗粒尺寸，制备出系列贵金属/石墨烯模型催化剂。借助近常压扫描隧道显微镜和近常压X射线光电子能谱，从超高真空到近常压气氛连续可调可控的环境下，原位表征模型表面对CO等探针分子的吸附及活化性能，解析石墨烯表面不同配位环境对贵金属活性组分电子结构的调变规律，从而为实际石墨烯负载贵金属催化体系构效关系的建立提供新的研究方法。

Graphene-supported noble metal catalysts are widely used in energy and catalysis field, but the identification of catalytic active sites in this system mostly depends on theoretical calculations. We combine plasma and CVD methods together with STM and XPS, through vacuum interconnection, to prepare the defect- and density-controled model graphene carriers, which could be used to develop the coordination- and size-controled noble metal/graphene model catalyst using ALD method. By the help of near-atmospheric scanning tunneling microscope and near-atmospheric X-ray photoelectron spectroscopy, in situ characterization of the adsorption and activation of probe molecules, such as CO, on the surface of the model catalysts will be conducted, to better understand the regulation of the metal electronic structure in different coordination environments on the graphene surface, so as to provide a new way to unravel the structural model for the establishment of the structure-activity relationship of the actual graphene-supported noble metal catalytic system.