Electrochemical characterization of thin passive films on Nb electrodes in H3PO4 solutions

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Electrochemical Characterization of Thin Passive Films on Nb Electrodes in H3PO4 Solutions

The electrical and semiconducting properties of thin anodic passive films potentiostatically formed (1 V ≤ Ef ≤ 5 V vs. sce) on polycrystalline niobium electrodes in aqueous 0.5 mol/L H3PO4 solutions (pH 1.3) were studied, at room temperature, using electrochemical impedance spectroscopy. The data were analysed with a transfer function using a non-linear fitting routine, assuming that the resis...

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ژورنال

عنوان ژورنال: Journal of the Brazilian Chemical Society

سال: 1997

ISSN: 0103-5053

DOI: 10.1590/s0103-50531997000600008