Enhanced photoelectrochemical oxidation of water over undoped and Ti-doped α-Fe2O3 electrodes by electrochemical reduction pretreatment

被引：17
|
作者：
Shangguan, Pengpeng [1 ]
Tong, Shaoping [1 ]
Li, Haili [2 ]
Leng, Wenhua [2 ]
机构：
[1] Zhejiang Univ Technol, Coll Chem Engn & Mat Sci, Hangzhou 310032, Zhejiang, Peoples R China
[2] Zhejiang Univ, Dept Chem, Hangzhou 310027, Zhejiang, Peoples R China
来源：
RSC ADVANCES | 2013年 / 3卷 / 26期
基金：
美国国家科学基金会;
关键词：
CHARGE-TRANSFER; THIN-FILMS; HEMATITE; PHOTOOXIDATION; PARTICLES; METAL;
D O I：
10.1039/c3ra41439f
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We demonstrate that the photoelectrochemical oxidation of water over undoped and Ti-doped alpha-Fe2O3 electrodes could be highly enhanced by in situ electrochemical reduction pretreatment at -1.2 <= E < -0.6 V versus a saturated calomel electrode in the dark in aqueous 1 M NaOH electrolyte for tens of minutes. This enhancement is mainly due to a significant decrease of charge recombination and a favourable photohole transfer and is physically associated with the partial transformation of Fe2O3 to Fe3O4/FeOOH and Fe by electrochemical reduction.
引用
收藏
页码：10163 / 10167
页数：5
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