| 초록 |
Prior study on CO2RR have focused on the catalytic properties of various materials in liquid condition. However, the current density for CO2RR is restricted under 30 mA cm–2 due to the mass transfer limit and low solubility of CO2 in the aqueous solution. To increase the current density, the gas fed CO2 electrolysis system was investigated using a gas-diffusion layer system. Herein, we developed a convenient Ag- and Cu-based electrode with high selectivity and high current density for electrochemical conversion of CO2 to CO and ethylene in a zero-gap electrolyzer, respectively. Moreover, the prepared electrode was analyzed the change of electronic structure using in-situ/operando X-ray absorption spectroscopy (XAFS) at real gas fed zero-gap electrolyzer condition. Based on these results, we could give insights about the scalable electrolyzer system for electrochemical conversion of CO2 with high catalytic activity and selectivity. |
