| 초록 |
Due to the environmental problems from carbon dioxide concentration increases in the atmosphere, utilization of CO2 is essential. Electrocatalytic CO2 reduction is one of the methods for the utilization of CO2 by using electrical energy. Among the various catalyst materials for CO2 electro-reduction, gold is considered as the most promising catalyst material which shows high CO production with considerably low overpotential. However, it is needed to perform surface modifications because of low catalytic performance without surface modifications for many surface reaction sites and lowering energy barriers in the reaction. Herein, the gold film which consists of uniformly coated 3D porous particles from the dendritic fibrous nanosilica (KCC-1) was fabricated. KCC-1 has all-directional opened pores because of uniform fibers from the center to the outside. To utilize the unique structure of KCC-1, the gold e-beam evaporation method was conducted on KCC-1 coated wafer. Gold particles showed a similar structure as KCC-1 which has improved surface reaction sites with high grain boundary density which decreases the energy barrier in the electrocatalytic CO2 reduction reaction. |
