Experimental studies of negative resistance of galvanic cells and the undamped electric oscillation generated by electrochemical oscillators

The equivalent impedance, measured at relatively low frequencies ( ≲ 200 $\text{c}\text{sec}$), of galvanic cells, DME/In(III), 1 M NaBr/Hg-pool and DME/Ni(II), 1 M KSCN/Hg-pool, was shown to give a negative resistance when the DME was negatively polarized. The mechanism of the electrode reactions of the DME/In(III)-NaBr and DME/Ni(II)-KSCN systems was assumed to be similar to that proposed for the DME/ In(III)-KSCN system.

These galvanic cells produced undamped oscillating currents when used as part of an electrochemical oscillator. The oscillation was almost purely sinusoidal, and the observed frequencies were in relatively good agreement with the calculated values.