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Electrochemical measurements on metal oxide electrodes—I. Zirconium dioxide

✍ Scribed by M.J. Madou; K. Kinoshita

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
799 KB
Volume
29
Category
Article
ISSN
0013-4686

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✦ Synopsis

Absbaet

-Electrochemical studies were conducted on Z.-ZIG, electrodes as part of the program iu this laboratory on the development of pH probes for use in high temperature/h&b presswe aqueous systems. The influence-of various methods of &&ration of the oxid~electrode on the -_ open circuit potenti (V,) and llatbnd potential ( V,) were investigated. Electrodes with low impedance had a V, that exhibited a Nerustian response to pH (-5$mV/pH) at 23°C. and oxide eiecwodes with high impedance l&i a V+ that was insensitive to pH. Because of the frequency dispersion in the MottSchottky plots and the exhaustIon of the oxide, V, could not be determined for the ZrO, films. The electrochemical results indicate that the Zr-ZrOz electrodes as used in this study do not offer much prospect for monitoring the pH of aqueous solutions.

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