Cathodic shift in onset potential of solar oxygen evolution on hematite by 13-group oxide overlayers

被引：258

作者：

Hisatomi, Takashi ^{[1
]}

Le Formal, Florian ^{[1
]}

Cornuz, Maurin ^{[1
]}

Brillet, Jeremie ^{[1
]}

Tetreault, Nicolas ^{[1
]}

Sivula, Kevin ^{[1
]}

Graetzel, Michael ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, CH-1015 Lausanne, Switzerland

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2011年 / 4卷 / 07期

关键词：

CORUNDUM-TYPE IN2O3; NANOSTRUCTURED ALPHA-FE2O3; WATER PHOTOOXIDATION; HYDROGEN-PRODUCTION; FILM THICKNESS; FEATURE SIZE; SEMICONDUCTOR; PHOTOANODES; ELECTRODES; ALPHA-AL2O3;

D O I：

10.1039/c1ee01194d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The onset potential of photoelectrochemical water oxidation on ultrathin hematite was improved by up to 200 mV by the chemical bath deposition of 13-group oxides as overlayers. It is proposed that the corundum-type overlayers released lattice strain of the ultrathin hematite layer and decreased the density of surface states. Particularly, a Ga(2)O(3) overlayer exhibited an enhanced photocurrent attributed to stoichiometric water splitting near the onset potential. The photocurrent was sustained over a day, attesting to its outstanding performance and durability for water splitting.

引用

页码：2512 / 2515

页数：4

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