Remarkable improvement of the turn-on characteristics of a Fe2O3 photoanode for photoelectrochemical water splitting with coating a FeCoW oxy-hydroxide gel

被引：62

作者：

Xiao, Jingran ^{[1
]}

Huang, Huali ^{[1
]}

Huang, Qiuyang ^{[1
]}

Li, Xiang ^{[1
]}

Hou, Xuelan ^{[1
]}

Zhao, Le ^{[1
]}

Ma, Rui ^{[1
]}

Chen, Hong ^{[1
,2
]}

Li, Yongdan ^{[1
]}

机构：

[1] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Sch Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol,Stat, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2017年 / 212卷

关键词：

Hematite; Turn-on voltage; Photoanode; Water splitting; DOPED HEMATITE PHOTOANODE; OXIDATION; PHOTOOXIDATION; COCATALYST; ELECTRODES; PURE; NI; CO;

D O I：

10.1016/j.apcatb.2017.04.075

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A FeCoW oxy-hydroxide gel coated Fe2O3 film photoanode has been examined for photoelectrochemical (PEC) water oxidation reaction. The FeCoW coating acts as a hole storage layer, resulting in efficient hole extraction from Fe2O3 for water oxidation. In addition, the surface state of FeCoW/Fe2O3 shifts to higher position, thus allows for a lower turn-on voltage (Von) of the photocurrent. The composite anode exhibits an 84% increase of the photocurrent, at 1.23 V versus reversible hydrogen electrode (RHE), over the bare Fez 03 photoanode. The Von is as low as 0.67 V vs. RHE. The applied bias photon-to-current efficiency of the composite is 2.7 times higher than that of the bare Fe2O3. Moreover, an extremely low bias photoresponse of 0.45 V vs. RHE and a good stability are observed with the FeCoW/Fe2O3 photoanode. Besides, with changing of the thickness of the FeCoW coating slurry, the PEC performance of the FeCoW/Fe2O3 photoanode can be tuned. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：89 / 96

页数：8

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