Single-crystalline, wormlike hematite photoanodes for efficient solar water splitting

被引：610

作者：

Kim, Jae Young ^{[1
]}

Magesh, Ganesan ^{[1
]}

Youn, Duck Hyun ^{[1
]}

Jang, Ji-Wook ^{[1
]}

Kubota, Jun ^{[2
]}

Domen, Kazunari ^{[2
]}

Lee, Jae Sung ^{[3
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 790784, South Korea

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

[3] Ulsan Natl Inst Sci & Technol, Sch Energy & Chem Engn, Ulsan 689798, South Korea

来源：

SCIENTIFIC REPORTS | 2013年 / 3卷

基金：

新加坡国家研究基金会;

关键词：

OXYGEN-EVOLVING CATALYST; HYDROGEN-PRODUCTION; THIN-FILMS; ARTIFICIAL PHOTOSYNTHESIS; CHARGE-TRANSFER; OXIDE; OXIDATION; GRAPHENE; ELECTRODES; PHOSPHATE;

D O I：

10.1038/srep02681

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A hematite photoanode showing a stable, record-breaking performance of 4.32 mA/cm(2) photoelectrochemical water oxidation current at 1.23 V vs. RHE under simulated 1-sun (100 mW/cm(2)) irradiation is reported. This photocurrent corresponds to ca. 34% of the maximum theoretical limit expected for hematite with a band gap of 2.1 V. The photoanode produced stoichiometric hydrogen and oxygen gases in amounts close to the expected values from the photocurrent. The hematitle has a unique single-crystalline "wormlike" morphology produced by in-situ two-step annealing at 550 degrees C and 800 degrees C of beta-FeOOH nanorods grown directly on a transparent conducting oxide glass via an all-solution method. In addition, it is modified by platinum doping to improve the charge transfer characteristics of hematite and an oxygen-evolving co-catalyst on the surface.

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页数：8

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