Photocurrent response of the passive film on iron in a high-temperature aqueous electrolyte

被引：8

作者：

Bojinov, M ^{[1
]}

Kinnunen, P ^{[1
]}

Laitinen, T ^{[1
]}

Mäkelä, K ^{[1
]}

Saario, T ^{[1
]}

Sirkiä, P ^{[1
]}

机构：

[1] VTT Mfg Technol, FIN-02044 Espoo, Finland

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2002年 / 4卷 / 03期

关键词：

passive film; photocurrent; high-temperature aqueous electrolyte; re-circulation loop;

D O I：

10.1016/S1388-2481(02)00257-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An experimental setup for in situ photoelectrochemical measurements of passive films in high-temperature, high-pressure electrolytes are described. The setup enables photovoltammetric and photocurrent spectroscopic measurements at temperatures up to 300 degreesC and at pressures up to 10 MPa. The first results on the photocurrent response of the passive film on Fe in 0.05 M Na2B4O7 (pH 9.3) are presented. The dependences of the photocurrent on photon energy and electrode potential are explored. The results are discussed in terms of the effect of temperature and potential on the nature of the photoactive layer in the passive film on Fe. It can be concluded that despite the increase in the overall thickness of the film on Fe with increasing temperature. the thickness of the photoactive layer seems to remain constant. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：222 / 226

页数：5

共 15 条

[1]

BEVERSKOG B, IN PRESS CORROS SCI

[2]

BOGAERTS WF, 1988, NP5863 EPRI

[3] Conduction mechanism of the anodic film on Fe-Cr alloys in sulfate solutions [J].