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      • KCI등재

        Synergistic interaction of P and N co-doping EDTA with controllable active EDTA-cobalt sites as efficient electrocatalyst for oxygen reduction reaction

        Kwanwoo Kim,Jaehyun Wie,Jooheon Kim 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.83 No.-

        It is extremely advisable but challenging to develop cathodic catalyst for efficiently catalyzing the oxygenreduction reaction (ORR) in energy storage and conversion system. Nitrogen (N) and phosphorus (P) co-doped porous carbon (C) materials have been prepared as a non-precious metal catalyst. This synthesis wasachieved through pyrolysis of ethylenediaminetetraacetic acid, triphenylphosphine, melamine andCoCl2 6H2 O mixture. The resulting material was capable of efficiently charge transfer via the coordinationbond of cobalt (Co) and EDTA, that makes octahedral structure. In addition, redistribution of charge occurreddue to co-doping of the N and P, which is advantageous for the oxygen reduction reaction (ORR). The as-prepared N and P co-doped mesoporous carbon (NPMPC) was characterized by a high average porosityand ahigh specific surface area. Furthermore, the NPMPC had a positive effect on ORR by allowing triple phases(gas-liquid-solid) to coexist in a wide range. We have successfully fabricated electrochemical catalysts thathave not been reported previously. The electrocatalytic activity of NPMPC-0.6 (E onset:-0.08 V & Ehalf-wave:-0.136 V)for ORR in alkalinemediawasbetterthanPt/C(Eonset:-0.037 V &Ehalf-wave:-0.122 V).Overall,NPMPC-0.6 showed high efficiency and improved performance for oxygen reduction reaction.

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