One of the most important issues in the research related to Zn–air batteries is the hydrolysis of the
aqueous solution.We have investigated the effectiveness of Zn ions and the anions of various acids as gas
suppressants in the battery. Zn ions can function as a gas suppressant on a Pt surface, but they can
stimulate additional gas production when they are deposited as Zn metal. On the other hand, the counter
anions of weak acids behave as adsorbates to cover Zn metal effectively.