Abstract
AbstractElectrocatalysts are readily poisoned during the catalysis of the oxygen reduction reaction (ORR); even air containing traces of SOx and/or NOx significantly decrease the activity and the durability of H2–O2 fuel cells. Now, a metal‐free strategy is reported to develop an efficient anti‐poisoning ORR catalyst, which involves the pyrolysis of PDAP‐phytic acid super‐molecular aggregate (PPSA). The pyrolyzed co‐doped carbon acting as a metal‐free electrocatalyst shows an enhanced activity for ORR in acidic medium, even under poisoning conditions (SOx, NOx, and POx). Moreover, P‐doping also changes the ORR pathway by yielding less than 4 % of H2O2, indicating a four‐electron pathway whereas more than>20 % of H2O2 was recorded for N‐doped carbon synthesized from PDAP.
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