Acridinium salts are electrocatalysts for H2 production.
Tentative catalytic mechanism of proton reduction by PhAcrI is discussed.
A mechanism involving initial reduction of PhAcr+/PhAcralt="radical dot" data-inlimg="/entities/rad" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB"> and subsequent protonation is proposed.