Oxygen reduction reaction (ORR) is a critical process for several electrocatalytic and photocatalytic devices. Poly(3,4-ethylenedioxythiophene), PEDOT, an efficient ORR catalyst, with hydrogen peroxide (H2O2) being the primary product. Although H2O2 green fuel batteries cells used as industrial oxidant, it toxic living systems. As such, its production should be limited when PEDOT films are in b...