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Electrochemistry communications v.75, 2017년, pp.38 - 42   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Transition metal-nitrogen-carbon catalysts for oxygen reduction reaction in neutral electrolyte

Rojas-Carbonell, Santiago (Corresponding author at: University of New Mexico, Department of Chemical & Biological Engineering, Center for Micro-Engineered Materials, 87131 Albuquerque, NM, United States. ); Santoro, Carlo ( ); Serov, Alexey ( ); Atanassov, Plamen ( );
  • 초록  

    Abstract Platinum group metal-free (PGM-free) catalysts based on M-N-C types of materials with M as Mn, Fe, Co and Ni and aminoantipyrine (AAPyr) as N-C precursors were synthesized using sacrificial support method. Catalysts kinetics of oxygen reduction reaction (ORR) was studied using rotating ring disk electrode (RRDE) in neutral pH. Results showed that performances were distributed among the catalysts as: Fe-AAPyr>Co-AAPyr>Mn-AAPyr>Ni-AAPyr. Fe-AAPyr had the highest onset potential and half-wave potential. All the materials showed similar limiting current. Fe-AAPyr had an electron transfer involving 4e − with peroxide formed lower than 5%. Considering H 2 O 2 produced, it seems that Co-AAPyr, Mn-AAPyr and Ni-AAPyr follow a 2×2e − mechanism with peroxide formed during the intermediate step. Durability test was done on Fe-AAPyr for 10,000cycles. Decrease of activity was observed only after 10,000cycles. Highlights Systematic kinetics study on PGM-free catalysts in neutral media. Mn-, Fe-, Co-, Ni- AAPyr were used as PGM-free catalysts. Fe-AAPyr had higher current densities and an apparent 4e − transfer mechanism. Mn-, Co-, Ni- AAPyr seems to follow a 2×2e − mechanism. Fe-AAPyr was cycled 10,000 times with minimal degradation. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    ORR .   PGM-free .   Current production .   Electron transfer .   Neutral pH.  

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