| 초록 |
Due to excessive use of fossil fuels, concentration of carbon dioxide in the atmosphere has risen steadily, and it results in environmental issues like greenhouse effect and sea-level rising. To control these issues, various approaches have been studied and electrochemical carbon dioxide reduction reaction emerges as solution by converting carbon dioxide into feedstocks. It not only reduces carbon dioxide emission, but also stores intermittent renewable energy into stable products. Among diverse electrocatalysts, only copper metal can produce multi-electron(＞2) products like methane, ethylene, ethanol, etc. Also, recent studies report that copper-doped ceria shows high methane selectivity by oxygen vacancies around Cu sites. So, we synthesized bct phase ceria and doped dispersed Cu single atoms by wet impregnation. The Cu-doped ceria produced methane from carbon dioxide, and it was annealed under argon atmosphere to remove ligands surrounding it. |
