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Impedance measurements of platinum electrodes on a solid protonic conductor

Authors
Journal
Solid State Ionics
0167-2738
Publisher
Elsevier
Publication Date
Volume
59
Identifiers
DOI: 10.1016/0167-2738(93)90238-x

Abstract

Abstract Non-blocking electrode processes in a protonic conductor, bonded hydronium-NASICON, have been investigated at room temperature by Impedance Spectroscopy. A comparison of the platinum-paste electrode morphology and reactions with those of ZrO 2-based cells is given. The electrode impedance shows a dramatic change when varying the hydrogen partial pressure P H 2. The frequency dispersion (impedance) data have been successfully analyzed using the Boukamp EQIVCT fitting program, and an equivalent circuit has been accordingly presented. The rise of diffusion-controlled effects at low P H 2 is also manifested.

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