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Periodic current signals of very low frequency and amplitude for real surface area measurements: (II) Application to nickel electrodes

✍ Scribed by C.A. Marozzi; A.C. Chialvo

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 679 KB
Volume: 41
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(96)00013-8

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✦ Synopsis

The present work deals with the application of the method described in Part I for the measurement of the real surface area of electrodes using periodic current signals of very low frequency and amplitude. It was applied to rough nickel electrodes in aqueous solutions of lo-*M quinhydrone and OSM K,SO,, buffered with acetic acid and sodium acetate. A specific interfacial capacity of 20.9pF cm-' and polarization resistance of 33.8 kRcm* have been determined. The accuracy of the proposed method has also been determined through the application of different current signals and different wave parameters.

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✍ C.A. Marozzi; A.C. Chialvo 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 742 KB

The use of periodic current signals (square, triangular, Dirac delta pulse, sinusoidal and displaced square waves) of very low frequencies and amplitudes has been investigated for the evaluation of the real surface area of electrodes. The potential response of an electrode perturbed with any of thes