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Simple and modified synthesis route for preparation of Fe-N/C type oxygen reduction reaction (ORR) catalysts has been worked out and discussed. The significant effect of the N precursor chemical composition on the ORR activity in 0.1 M KOH and 0.1 M HClO4 electrolyte solutions has been demonstrated. The half-wave potential values increased in the following order: C(SiC) < Fe + Urea/C < Fe + EDTA/C < Fe + DIPO/C ≤ Fe + Phen/C ≤ Fe + Bipyr/C...
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