RisingpheMHnena of aQueouri solution Inenism wen? found for the silver electrode of a 5 MHz piemelectric quartz crystal (PQC) PartiaUYin Ni$j04, NaCI04, HCIO, and NaF aqueou~ solutiorr~ at reduction potentials, re~pect i d y . A detailed study revealed that a decrea~e in conhct-angle hysteresis (or a contact-angle decrease) and a continued collection of the water product at the solid-gas-solution interface during oxygen reduction, rather than the eleetrocapillary effect and an agitation effect i n d d by the oscillation of PQC, are mpomible for the meniscus-rising phenomena. In addition, in Siru determination of the immersed height of a partiaUy immersed Ag electrode was studied on the basis of simultaneous measurements of the electroacoustic admittance and electrochemical impedance.
KeywordsQuartz crystal impedance, Ag electrode, meniscus rising, oxygen reduction, measurement of immersed height of electrode
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