Kinetics and mechanism of light-driven oxygen evolution at thin film α-Fe2O3 electrodes

被引：201

作者：

Cummings, Charles Y. ^{[1
]}

Marken, Frank ^{[1
]}

Peter, Laurence M. ^{[1
]}

Tahir, Asif A. ^{[2
]}

Wijayantha, K. G. Upul ^{[2
]}

机构：

[1] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England

[2] Univ Loughborough, Dept Chem, Loughborough LE11 3TU, Leics, England

来源：

CHEMICAL COMMUNICATIONS | 2012年 / 48卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

PHOTOELECTROCHEMISTRY; PHOTOCURRENTS; SPECTROSCOPY; TRANSIENT;

D O I：

10.1039/c2cc16382a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Rate constants for recombination and hole transfer during oxygen evolution at illuminated alpha-Fe2O3 electrodes were measured by intensity-modulated photocurrent spectroscopy and found to be remarkably low. Treatment of the electrode with a Co(II) solution suppressed surface recombination but did not catalyse hole transfer. Intermediates in the reaction were detected spectroscopically.

引用

页码：2027 / 2029

页数：3

共 16 条

[1] TRANSIENT PHOTOCURRENTS AT PASSIVE IRON ELECTRODES [J].

ABRANTES, LM ;

PETER, LM .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1983, 150 (1-2) :593-601

[2] New Insights into Water Splitting at Mesoporous α-Fe2O3 Films: A Study by Modulated Transmittance and Impedance Spectroscopies [J].

Cummings, Charles Y. ;

Marken, Frank ;

Peter, Laurence M. ;

Wijayantha, K. G. Upul ;

Tahir, Asif A. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (02) :1228-1234

[3] 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

[4] A kinetic study of CdS photocorrosion by intensity modulated photocurrent and photoelectrochemical impedance spectroscopy [J].

Fermín, DJ ;

Ponomarev, EA ;

Peter, LM .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 473 (1-2) :192-203

[5] New benchmark for water photooxidation by nanostructured α-Fe2O3 films [J].

Kay, Andreas ;

Cesar, Ilkay ;

Graetzel, Michael .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (49) :15714-15721

[6] Dynamics of photogenerated holes in nanocrystalline α-Fe2O3 electrodes for water oxidation probed by transient absorption spectroscopy [J].

Pendlebury, Stephanie R. ;

Barroso, Monica ;

Cowan, Alexander J. ;

Sivula, Kevin ;

Tang, Junwang ;

Graetzel, Michael ;

Klug, David ;

Durrant, James R. .

CHEMICAL COMMUNICATIONS, 2011, 47 (02) :716-718

[7]

Peter L.M., 1999, ADV ELECTROCHEMICAL, V6, P77, DOI DOI 10.1002/9783527616800.CH2

[8] Kinetics of light-driven oxygen evolution at α-Fe2O3 electrodes [J].

Peter, Laurence M. ;

Wijayantha, K. G. Upul ;

Tahir, Asif A. .

FARADAY DISCUSSIONS, 2012, 155 :309-322

[9] DYNAMIC ASPECTS OF SEMICONDUCTOR PHOTOELECTROCHEMISTRY [J].

PETER, LM .

CHEMICAL REVIEWS, 1990, 90 (05) :753-769

[10] SURFACE RECOMBINATION AT SEMICONDUCTOR ELECTRODES .1. TRANSIENT AND STEADY-STATE PHOTOCURRENTS [J].

PETER, LM ;

LI, J ;

PEAT, R .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1984, 165 (1-2) :29-40

← 1 2 →