Development of a Potential Fe2O3-Based Photocatalyst Thin Film for Water Oxidation by Scanning Electrochemical Microscopy: Effects of Ag-Fe2O3 Nanocomposite and Sn Doping

被引：88

作者：

Jang, Jum Suk ^{[1
]}

Yoon, Ki You ^{[1
]}

Xiao, Xiaoyin ^{[1
]}

Fan, Fu-Ren F. ^{[1
]}

Bard, Allen J. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Chem & Biochem, Ctr Electrochem, Austin, TX 78712 USA

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 20期

关键词：

PHOTOELECTROCHEMICAL PROPERTIES; HYDROGEN-PRODUCTION; ALPHA-FE2O3; FILMS; IRON(III) OXIDE; VISIBLE-LIGHT; SOLAR-CELLS; TIO2; ELECTRODES; NANOPARTICLES; FABRICATION;

D O I：

10.1021/cm901056c

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：

Ag-Fe2O3 and Sn-doped Ag-Fe2O3 nanocomposite photocatalysts were optimized by scanning photoelectrochemical microscopy (SPECM) as a potential photoelectrochemical material for visible light irradiation (lambda >= 420 nm). The photocurrent vs potential response and the action spectra were investigated in a three-electrode cell. Among different mole ratios, the composition of nanocomposite with 50% Ag-50% Fe (atomic percentage) showed a dramatic improvement in photocurrent on a thin film electrode under visible light (lambda >= 420 nm). The addition of 2 atomic % Sn (relative to Fe) produced an Ag-Fe2O3 nanocomposite with the largest photocurrent in alkaline solution under visible light irradiation (lambda >= 420 nm).

引用

页码：4803 / 4810

页数：8

共 32 条

[1]

ANDERMAN M, 1988, SEMICONDUCTOR ELECTR, pCH3

[2] Photoelectrochemistry of tin-doped iron oxide electrodes [J].

Aroutiounian, V. M. ;

Arakelyan, V. M. ;

Shahnazaryan, G. E. ;

Hovhannisyan, H. R. ;

Wang, Heli ;

Turner, John A. .

SOLAR ENERGY, 2007, 81 (11) :1369-1376

[3] ARTIFICIAL PHOTOSYNTHESIS - SOLAR SPLITTING OF WATER TO HYDROGEN AND OXYGEN [J].

BARD, AJ ;

FOX, MA .

ACCOUNTS OF CHEMICAL RESEARCH, 1995, 28 (03) :141-145

[4] Influence of metal (Au, Ag) micro-grid on the photocatalytic activity of TiO2 film [J].

Cai, Chao ;

Zhang, Junying ;

Pan, Feng ;

Zhang, Weiwei ;

Zhu, Hailing ;

Wang, Tianmin .

CATALYSIS LETTERS, 2008, 123 (1-2) :51-55

[5] Surface plasmons for enhanced silicon light-emitting diodes and solar cells [J].

Catchpole, K. R. ;

Pillai, S. .

JOURNAL OF LUMINESCENCE, 2006, 121 (02) :315-318

[6] Water splitting with silver chloride photoanodes and amorphous silicon solar cells [J].

Currao, A ;

Reddy, VR ;

van Veen, MK ;

Schropp, REI ;

Calzaferri, G .

PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, 2004, 3 (11-12) :1017-1025

[7] ELECTROCHEMISTRY AND PHOTOELECTROCHEMISTRY OF IRON(III) OXIDE [J].

DAREEDWARDS, MP ;

GOODENOUGH, JB ;

HAMNETT, A ;

TREVELLICK, PR .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1983, 79 :2027-2041

[8] 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

[9] 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

[10]

Glaus S, 2002, CHEM-EUR J, V8, P1785, DOI 10.1002/1521-3765(20020415)8:8<1785::AID-CHEM1785>3.0.CO

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