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O: Fachverband Oberflächenphysik

O 20: Poster Session II: Heterogeneous catalysis II

O 20.5: Poster

Monday, March 1, 2021, 13:30–15:30, P

Interfacial catalysis over well-defined Cu2O nanostructures — •Fan Yang — School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China

The catalytic properties of nano-oxides are increasingly recognized and currently explored for a wide range of applications. However, the nature of the active sites of these nano-oxides, as well as their catalytic chemistry, remain poorly understood, because of the difficulties to access these surface/interfacial sites at the atomic level. Using molecular beam epitaxy, we construct well-defined oxide nanostructures (NSs) on planar metal or oxide surfaces, which serve as the model systems for understanding the catalytic chemistry of the metal-oxide interface and nano-oxides. In this talk, we report our recent progress in the studies of low temperature CO oxidation using supported Cu2O NSs as the model catalyst. The Cu2O-M interface has been suggested as catalytic active sites for low temperature CO oxidation and a series of selective oxidation reactions. Combining microscopic and spectroscopic methods, CO oxidation was investigated at the Cu2O-M interface, to understand the mechanism of low temperature CO oxidation and the catalytic properties of the metal-oxide interface. A highly dynamic behavior of the catalytically active interfacial sites were observed, which accounts for the enhanced activities and stability of supported oxide NSs for oxidation reactions. Overall, we wish to demonstrate that the control over supported oxide NSs could enable a wide range of catalytic properties for the rational design of highly efficient catalysts.