| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of reducing carbon dioxide in which carbon dioxide in an electrolytic solution is decomposed to produce gaseous methane, or the like, using an electrode for electrolytic reaction excellent in electric conductivity, high in the conversion efficiency of energy, moreover excellent in chemical stability in a solution and good in life characteristics. SOLUTION: In an electrolytic solution, an electrode obtained by depositing a diamond thin film imparted with electrical conductivity at least on a silicon substrate is arranged, to the inside of the solution, carbon dioxide is exposed, and moreover, light is applied on the diamond thin film on the energized electrode surface, by which at least gaseous methane is produced. |
