What's the noun for depolarizer? Here's the word you're looking for.
depolarizer
(chemistry) Any substance added to the electrolyte of a battery that produces hydrogen in order to combine with the liberated hydrogen and prevent the build up of pressure.
“Next, we polarized mitochondria with succinate in the presence of rotenone to examine the effects of proton pumping on the transient depolarizations.”
“As the different depolarizations are activated, peaks in this current are observed when plotted vs.”