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Photoelectrochemical behavior of thin, thermally grown polycrystalline Fe2O3films

Authors
Journal
Electrochimica Acta
0013-4686
Publisher
Elsevier
Publication Date
Volume
26
Issue
12
Identifiers
DOI: 10.1016/0013-4686(81)85167-5
Disciplines
  • Chemistry

Abstract

Abstract The photoelectrochemical behavior of a number of photoelectrodes prepared in polycrystalline form from 99.9% iron (Armco) under controlled thermal oxidation conditions is reported. The steady-state polarization curves show a complicated aspect corresponding to changes in the charge transfer kinetics. A strong influence of the surface oxide thickness ( d) on both the electrochemical characteristics and the photocurrent efficiency is found. Maximum photocurrents are measured on oxide covered electrodes with d < 10 4 Å. The long term stability of the electrodes covered with oxide layers of thickness less than 10 3 Å is unsatisfactory.

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