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

Martin Bojinov (Corresponding Author), Petri Kinnunen, Timo Laitinen, Kari Mäkelä, Timo Saario, Pekka Sirkiä

    Research output: Contribution to journalArticleScientificpeer-review

    10 Citations (Scopus)


    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 °C 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.
    Original languageEnglish
    Pages (from-to)222-226
    JournalElectrochemistry Communications
    Issue number3
    Publication statusPublished - 2002
    MoE publication typeA1 Journal article-refereed


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


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