ATR-SEIRAS Investigation of the Fermi Level of Pt Cocatalyst on a GaN Photocatalyst for Hydrogen Evolution under Irradiation

被引：137

作者：

Yoshida, Masaaki ^{[1
]}

Yamakata, Akira ^{[2
]}

Takanabe, Kazuhiro ^{[1
]}

Kubota, Jun ^{[1
]}

Osawa, Masatoshi ^{[2
]}

Domen, Kazunari ^{[1
]}

机构：

[1] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Hokkaido Univ, Catalysis Res Ctr, Kita Ku, Sapporo, Hokkaido 0010021, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 37期

关键词：

VISIBLE-LIGHT-DRIVEN; PLATINUM-ELECTRODE; SOLID-SOLUTION; WATER; ABSORPTION; NANOPARTICLES; OXIDATION; TIO2;

D O I：

10.1021/ja904991p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The interaction of photogenerated carries in GaN photocatalyst with Pt cocatalyst for hydrogen evolution under irradiation was investigated from in situ ATR-SEIRAS measurement by following the CO vibrational frequency. After irradiation, the CO frequency shifted higher, indicating that the Fermi Level of Pt particles was positively shifted by the photogenerated holes. Thereafter, a Lower frequency peak appeared, indicating that the Fermi level of some Pt particles was negatively shifted to the hydrogen evolution potential by photogenerated electrons, which is the essential function of cocatalysis for hydrogen evolution.

引用

页码：13218 / 13219

页数：2

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