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Investigation of hollow nitrogen-doped carbon spheres as non-precious Fe-N-4 based oxygen reduction catalysts

Title
Investigation of hollow nitrogen-doped carbon spheres as non-precious Fe-N-4 based oxygen reduction catalysts
Authors
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
2015
Citation
Journal of Materials Chemistry A, 3(30), 15473-15481
Type
Article
Article Type
Article
Keywords
Alkaline Fuel CellsCarbonCatalystsCathodesDoping (Additives)DurabilityElectrocatalystsElectrodesElectrolyte SolutionsElectrolytesElectrolytic ReductionFuel Cell ApplicationFuel CellsHeat-Treatment EffectsHeat TreatmentMaximum Power DensityNitrogen-Doped CarbonsNon-Precious CatalystsOxygenOxygen Reduction CatalystsOxygen Reduction ReactionPolyelectrolytesProton-Exchange Membrane Fuel Cells (PEMFC)Solid ElectrolytesX Ray Absorption
ISSN
2050-7488
Abstract
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.
URI
http://hdl.handle.net/20.500.11750/2973
DOI
10.1039/c5ta02677f
Publisher
Royal Society of Chemistry
Related Researcher
Files:
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Collection:
Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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