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dc.contributor.authorJakkid Sanetuntikulen_US
dc.contributor.authorChitiphon Chuaichamen_US
dc.contributor.authorYoung Woo Choien_US
dc.contributor.authorSangaraju Shanmugamen_US
dc.contributor.otherDaegu Gyeongbuk Institute of Science and Technologyen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherKorea Institute of Energy Researchen_US
dc.identifier.citationJournal of Materials Chemistry A. Vol.3, No.30 (2015), 15473-15481en_US
dc.description.abstract© 2015 Royal Society of Chemistry. 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-N<inf>4</inf> 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 H<inf>2</inf>-O<inf>2</inf> single cell and showed a maximum power density of ∼68 mW cm<sup>-2</sup>. 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.en_US
dc.rightsMahidol Universityen_US
dc.subjectMaterials Scienceen_US
dc.titleInvestigation of hollow nitrogen-doped carbon spheres as non-precious Fe-N&lt;inf&gt;4&lt;/inf&gt; based oxygen reduction catalystsen_US
Appears in Collections:Scopus 2011-2015

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