Electrochemical behavior of thin Ta3N5 semiconductor film

被引：146

作者：

Ishikawa, A

Takata, T

Kondo, JN

Hara, M

Domen, K

机构：

[1] Tokyo Inst Technol, Chem Resources Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[2] JST, CREST, Taito Ku, Tokyo 1100015, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2004年 / 108卷 / 30期

关键词：

D O I：

10.1021/jp048802u

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：

Tantalum nitride (Ta3N5) thin film is investigated as a visible light-driven photoelectrode material. The photoelectrochernical properties of the material are investigated on the basis of cyclic voltammograms and current-time curves, and the conduction and valence band edges of Ta3N5 are determined from the photocurrent voltage response. The potentials of the conduction and valence bands are found to be satisfactory for the reduction of H+ to H-2 and the oxidation of H2O to O-2. Anodic photocurrent associated with the oxidation of water is obtained under visible-light irradiation, although the Ta3N5 itself undergoes simultaneous oxidation. Through sustained photoinduced redox cycling on the Ta3N5 electrode in aqueous Fe(CN)(6)(3-)/Fe(CN)(6)(4-) solution, Ta3N5 thin film is demonstrated to function as a stable electrode for generating electric current under visible light.

引用

页码：11049 / 11053

页数：5

共 18 条

[1] Conduction and valence band positions of Ta2O5, TaON, and Ta3N5 by UPS and electrochemical methods
Chun, WJ
Ishikawa, A
Fujisawa, H
Takata, T
Kondo, JN
Hara, M
Kawai, M
Matsumoto, Y
Domen, K
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (08) : 1798 - 1803
[2] MECHANISM OF PHOTOCATALYTIC DECOMPOSITION OF WATER INTO H-2 AND O-2 OVER NIO - SRTIO3
DOMEN, K
KUDO, A
ONISHI, T
[J]. JOURNAL OF CATALYSIS, 1986, 102 (01) : 92 - 98
[3] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE
FUJISHIMA, A
HONDA, K
[J]. NATURE, 1972, 238 (5358) : 37 - +
[4] Ta3N5 and TaON thin films on Ta foil:: Surface composition and stability
Hara, M
Chiba, E
Ishikawa, A
Takata, T
Kondo, JN
Domen, K
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (48) : 13441 - 13445
[5] Ta3N5 as a novel visible light-driven photocatalyst (λ<600 nm)
Hitoki, G
Ishikawa, A
Takata, T
Kondo, JN
Hara, M
Domen, K
[J]. CHEMISTRY LETTERS, 2002, (07) : 736 - 737
[6] An oxynitride, TaON, as an efficient water oxidation photocatalyst under visible light irradiation (λ ≤ 500 nm)
Hitoki, G
Takata, T
Kondo, JN
Hara, M
Kobayashi, H
Domen, K
[J]. CHEMICAL COMMUNICATIONS, 2002, (16) : 1698 - 1699
[7] Electrochemistry and photoetching of n-GaN
Huygens, IM
Strubbe, K
Gomes, WP
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (05) : 1797 - 1802
[8] LaTiO2N as a visible-light (≤600 nm)-driven photocatalyst (2)
Kasahara, A
Nukumizu, K
Takata, T
Kondo, JN
Hara, M
Kobayashi, H
Domen, K
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (03) : 791 - 797
[9] Photoreactions on LaTiO2N under visible light irradiation
Kasahara, A
Nukumizu, K
Hitoki, G
Takata, T
Kondo, JN
Hara, M
Kobayashi, H
Domen, K
[J]. JOURNAL OF PHYSICAL CHEMISTRY A, 2002, 106 (29) : 6750 - 6753
[10] Highly efficient water splitting into H2 and O2 over lanthanum-doped NaTaO3 photocatalysts with high crystallinity and surface nanostructure
Kato, H
Asakura, K
Kudo, A
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (10) : 3082 - 3089

← 1 2 →