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Investigation of hollow nitrogen-doped carbon spheres as non-precious Fe-N-4 based oxygen reduction catalysts
- Investigation of hollow nitrogen-doped carbon spheres as non-precious Fe-N-4 based oxygen reduction catalysts
- Sanetuntikul, J[Sanetuntikul, Jakkid]; Chuaicham, C[Chuaicham, Chitiphon]; Choi, YW[Choi, Young-Woo]; Shanmugam, S[Shanmugam, Sangaraju]
- DGIST Authors
- Sanetuntikul, J[Sanetuntikul, Jakkid]; Shanmugam, S[Shanmugam, Sangaraju]
- Issue Date
- Journal of Materials Chemistry A, 3(30), 15473-15481
- Article Type
- Alkaline Fuel Cells; Carbon; Catalysts; Cathodes; Doping (Additives); Durability; Electrocatalysts; Electrodes; Electrolyte Solutions; Electrolytes; Electrolytic Reduction; Fuel Cell Application; Fuel Cells; Heat-Treatment Effects; Heat Treatment; Maximum Power Density; Nitrogen-Doped Carbons; Non-Precious Catalysts; Oxygen; Oxygen Reduction Catalysts; Oxygen Reduction Reaction; Polyelectrolytes; Proton-Exchange Membrane Fuel Cells (PEMFC); Solid Electrolytes; X Ray Absorption
- The development of inexpensive non-precious oxygen reduction catalysts has become one of the most important efforts in polymer electrolyte membrane fuel cells. In this report, we synthesized a non-precious electrocatalyst from a single precursor, iron(iii) diethylene triaminepentaacetate, using a heat-treatment effect to prepare an active catalyst. A series of catalysts were prepared at different temperatures leading to different degrees of graphitization, heteroatom content and activity. In 0.1 M KOH electrolyte solution, the oxygen reduction reaction (ORR) onset potential of the HNCS71 catalyst was as high as 0.97 V, and half-wave potentials were only 20 mV lower than those for Pt/C. X-ray absorption measurements of the Fe K-edge showed the structure of Fe-N4 centers, formed in HNCS71, which were responsible for the ORR activity. An alkaline exchange membrane fuel cell fabricated with HNCS71 as the cathode was tested in a H2-O2 single cell and showed a maximum power density of ∼68 mW cm-2. The 100 hour fuel cell durability test of the HNCS71 cathode showed a decay in the current density of about 14% at 0.4 V. Therefore, the HNCS catalyst appears to be a promising new class of non-precious catalysts for fuel cell applications. © 2015 Royal Society of Chemistry.
- Royal Society of Chemistry
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- Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles
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