Insights into the hydronium-ion storage of alloxazine in mild electrolyte

Here, it is shown for the first time that alloxazine (ALO) can reversibly store hydronium ions in 1 M Mg(NO3)(2) electrolyte. Comprehensive analyses confirm that Mg2+ ions, which possess catalytic properties, can promote hydronium-ion transfer by forming a stable complex with reducing ALO.