[25p-P01-1~19] 6.3 Oxide electronics

[25p-P01-13] Electronic state analysis of photocatalytic micro-particles using scanning photoelectron microscopy

〇(B)Kenta Oishi¹, Wenxiong Zhang², Takashi Hisatomi^3,4, Kazunari Domen^2,3, Masato Kotsugi¹, Naoka Nagamura^1,4,5 (1.Tokyo Univ. of Science, 2.Tokyo Univ., 3.Shinshu Univ., 4.JST PRESTO, 5.NIMS)

Keywords:XPS, photocatalyst

There are growing expectations for water-splitting semiconductor photocatalyst materials that can produce hydrogen using solar energy. In this paper, we report the influence of the electronic state on the hydrogen production activity of a water-splitting semiconductor photocatalyst device structure by single-particle spectroscopic analysis using a synchrotron radiation soft x-ray scanning electron microscope, 3D nanoESCA. It was found that the change in the electronic state, i.e., the decrease in n-type nature, is related to the enhancement of the hydrogen production reaction activity.