Mg-Zr Cosubstituted Ta3N5 Photoanode for Lower-Onset-Potential Solar-Driven Photoelectrochemical Water Splitting

被引：182

作者：

Seo, Jeongsuk ^{[1
]}

Takata, Tsuyoshi ^{[2
]}

Nakabayashi, Mamiko ^{[3
]}

Hisatomi, Takashi ^{[1
]}

Shibata, Naoya ^{[3
]}

Minegishi, Tsutomu ^{[1
]}

Domen, Kazunari ^{[1
]}

机构：

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

[2] Global Res Ctr Environm & Energy Based Nanolmat S, NIMS, Tsukuba, Ibaraki 3050044, Japan

[3] Univ Tokyo, Inst Engn Innovat, Bunkyo Ku, Tokyo 1138656, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2015年 / 137卷 / 40期

基金：

日本学术振兴会;

关键词：

PARTICLE TRANSFER; PHOTOCURRENT; OXIDATION; NA;

D O I：

10.1021/jacs.5b08329

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In p/n photoelectrochemical (PEC) cell systems, a low onset potential for the photoanode, as well as a high photocurrent, are critical for efficient water splitting. Here, we report a Mg-Zr cosubstituted Ta3N5 (Ta3N5:Mg+Zr) photoanode, designed to provide a more negative onset potential for PEC water splitting. The anodic photocurrent onset on Ta3N5:Mg+Zr was 0.55 V-RHE under AM 1.5G-simulated sunlight, which represented a negative shift from the ca. 0.8 VRHE for pure Ta3N5. This negative shift in the onset potential of PEC water splitting was attributed to the change in the bandgap potential due to partial substitution by the foreign ions Mg2+ and/or Zr4+.

引用

页码：12780 / 12783

页数：4

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