PHOTOCHEMICAL ELECTRODE FOR CARBON DIOXIDE REDUCTION AND METHOD FOR REDUCING CARBON DIOXIDE USING PHOTOCHEMICAL ELECTRODE FOR CARBON DIOXIDE REDUCTION

摘要

An anode electrode that is provided with a nitride semiconductor layer is used in the present invention. This nitride semiconductor layer is provided with an AlxGa1-xN layer (0 < x <= 0.25), an AlyGa1-yN layer (0 <= y <= x) and a GaN layer. The AlyGa1-yN layer is sandwiched between the AlxGa1-xN layer and the GaN layer. The value of x is constant in the thickness direction of the AlxGa1-xN layer, and the value of y is decreased in the direction from the AlxGa1-xN layer toward the GaN layer. Carbon dioxide is reduced by irradiating the AlxGa1-xN layer with light having a wavelength of 360 nm or less.