PHOTOCHEMICAL ELECTRODE, HYDROGEN GENERATING DEVICE AND METHOD, AND CARBON OXIDE REDUCTION DEVICE AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide a photochemical electrode capable of improving efficiency of reaction promoting by enhancing excitation efficiency of surface plasmon by excitation light.SOLUTION: Provided is the photochemical electrode comprising: a metal area having metal or a metal compound; and a metal thin film layer having metal or a metal compound, and part of whose surface is coated periodically so as to excite the surface plasmon by the metal area. The metal thin film layer may be configured so that part of its surface is coated in a period of 200 nm or more and 900 nm or less by the metal area.