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Electrochemical study of the chromium electrode behaviour in borate buffer solution

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Abstract

The electrochemical behaviour of the chromium electrode in borate buffer solution (pH 9.3) was studied by cyclic voltammetry and electrochemical impedance spectroscopy. Chromium passivity was observed over a broad potential region, from −1.0 to 0.5 V vs SCE. The passivation process took place in two steps: formation of a chromium oxide monolayer and transition of chromium to a higher valence state. The anodic film exhibited the properties of a p-type semiconductor. Transpassive dissolution of chromium occurred at 0.5 V vs SCE, with two reaction intermediates present, CrCr III and Crad 4+.

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Marijan, D., Gojić, M. Electrochemical study of the chromium electrode behaviour in borate buffer solution. Journal of Applied Electrochemistry 32, 1341–1346 (2002). https://doi.org/10.1023/A:1022674100306

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