METHOD OF GENERATING HYDROGEN BY DECOMPOSING WATER, AND PHOTOELECTROCHEMICAL CELL AND SEMICONDUCTOR ELECTRODE USED THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a method of generating hydrogen by decomposing water, which has higher hydrogen generation efficiency.SOLUTION: The present invention is the method of generating hydrogen by decomposing water. In the method according to the present invention, a photoelectrochemical cell 100 is used which includes a container 110, a liquid 140 stored in the container 110, a semiconductor electrode 120 housed in the container 110, and a counter electrode 130 housed in the container 110. The semiconductor electrode 120 includes a first semiconductor layer 121, a translucent conductor layer 122, and a second semiconductor layer 123.