SPM-based Methods for the Fundamental Understanding of Nano and Interfacial Catalysis
The structure and catalytic chemistry of well-defined model catalysts are characterized mainly by a few scanning probes, such as scanning tunneling microscopy (STM) and atomic force microscopy (AFM), together with UV and X-ray photoemission spectroscopy (UPS and XPS) and temperature programmed desorption (TPD). In-situ studies of model nanocatalysts are carried out from watching the elementary steps to monitoring a working surface/interface, which provide unprecedented insights on the nature of active sites, as well as the reaction mechanism. To connect UHV surface science findings with real catalysis practice, our in-situ studies of model catalysts have spanned from vacuum conditions to AP reaction conditions. We strive to achieve further understanding on confinement effect, a fundamental concept in catalysis, to build the relationship between active-site dynamics and catalytic activity/selectivity, and on this basis to design highly efficient nanocatalysts.