Ti and Sn co-doped anodic α-Fe2O3 films for efficient water splitting

被引：49

作者：

Wang, Lei ^{[1
]}

Lee, Chong-Yong ^{[1
]}

Schmuki, Patrik ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Dept Mat Sci & Engn, D-91058 Erlangen, Germany

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2013年 / 30卷

关键词：

alpha-Fe2O3; Ti loading; Water splitting; Photocurrent; FEATURE SIZE; THIN-FILMS; OXIDATION; ELECTRODES; NANOSTRUCTURE; PHOTOANODES;

D O I：

10.1016/j.elecom.2013.01.013

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Hematite (alpha-Fe2O3) films were produced by anodic FeOOH deposition on FTO, followed by TiCl4 decoration and an appropriate heat treatment Optimizing the amount of Ti addition (1.5 mu L cm(-2) of 0.2 M TiCl4) and annealing to 600 degrees C/750 degrees C allows to reach 1.4 mA cm(-2) at 1.23 V (vs. RHE) with a maximum photocurrent of 3.1 mA cm(-2) at 1.8 V (vs. RHE) in 1 M KOH under AM 1.5 (100 mW cm(-2)) simulated solar illumination. This comparably high photoresponse can be attributed to a combined Ti/Sn effect, the latter causing thermal Sn doping from the FTO. Photocurrent transients show that the main combined influence of Ti addition/Sn doping is a strong suppression of charge carrier recombination. This may be attributed to electronic effects but also to a different morphology observed for Ti treated samples. The work shows that simple anodic nanoporous films have a high potential for optimization towards highly efficient hematite based photoelectrodes. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：21 / 25

页数：5

共 24 条

[1] Decoupling Feature Size and Functionality in Solution-Processed, Porous Hematite Electrodes for Solar Water Splitting [J].

Brillet, Jeremie ;

Gratzel, Michael ;

Sivula, Kevin .

NANO LETTERS, 2010, 10 (10) :4155-4160

[2] Translucent thin film Fe2O3 photoanodes for efficient water splitting by sunlight:: Nanostructure-directing effect of Si-doping [J].

Cesar, I ;

Kay, A ;

Martinez, JAG ;

Grätzel, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (14) :4582-4583

[3] Facile preparation of Fe2O3 thin film with photoelectrochemical properties [J].

Cha, Hyun Gil ;

Song, Jieun ;

Kim, Hyun Sung ;

Shin, Woonsup ;

Yoon, Kyung Byung ;

Kang, Young Soo .

CHEMICAL COMMUNICATIONS, 2011, 47 (08) :2441-2443

[4] Visible light-induced water oxidation on mesoscopic α-Fe2O3 films made by ultrasonic spray pyrolysis [J].

Duret, A ;

Grätzel, M .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (36) :17184-17191

[5] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].

FUJISHIMA, A ;

HONDA, K .

NATURE, 1972, 238 (5358) :37-+

[6] Enhancement of photoelectrochemical hydrogen production from hematite thin films by the introduction of Ti and Si [J].

Glasscock, Julie A. ;

Barnes, Piers R. F. ;

Plumb, Ian C. ;

Savvides, Nick .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (44) :16477-16488

[7] Pt-doped α-Fe2O3 thin films active for photoelectrochemical water splitting [J].

Hu, Yong-Sheng ;

Kleiman-Shwarsctein, Alan ;

Forman, Arnold J. ;

Hazen, Daniel ;

Park, Jung-Nam ;

McFarland, Eric W. .

CHEMISTRY OF MATERIALS, 2008, 20 (12) :3803-3805

[8] Rapid Screening of Effective Dopants for Fe2O3 Photocatalysts with Scanning Electrochemical Microscopy and Investigation of Their Photoelectrochemical Properties [J].

Jang, Jum Suk ;

Lee, Joowook ;

Ye, Heechang ;

Fan, Fu-Ren F. ;

Bard, Allen J. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (16) :6719-6724

[9] PHOTOACTIVITY OF POLYCRYSTALLINE ALPHA-FE2O3 ELECTRODES DOPED WITH GROUP IVA ELEMENTS [J].

KENNEDY, JH ;

ANDERMAN, M ;

SHINAR, R .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1981, 128 (11) :2371-2373

[10] Electrodeposition of α-Fe2O3 doped with Mo or Cr as photoanodes for photocatalytic water splitting [J].

Kleiman-Shwarsctein, Alan ;

Hu, Yong-Sheng ;

Forman, Arnold J. ;

Stucky, Galen D. ;

McFarland, Eric W. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (40) :15900-15907

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