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In this report, we present results on the electrocatalytic activity of conducting polymers [polyaniline (PANI) and polypyrrole (PPy)] toward the electrochemical oxygen reduction reaction (ORR) to hydrogen peroxide (H 2 O 2 ). The electropolymerization of the polymers and electrolysis conditions were optimized for H 2 O 2 production. On flat glassy carbon (GC) electrodes, the faradaic efficiency (FE) for H 2 O 2 production was significantly improved by the polymers. Rotating disc electrode (RDE) studies revealed that this is mainly a result of blocking further H 2 O 2 to the water reduction pathway by the polymers. PPy on carbon paper (CP) significantly increased the molar production of H 2 O 2 by over 250% at an average FE of above 95% compared to bare CP with a FE of 25%. Thus, the polymers are acting as catalysts on the electrode for the ORR, although their catalytic mechanisms differ from other electrocatalysts., Competing Interests: The authors declare no competing financial interest., (© 2020 American Chemical Society.)