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dc.contributor.authorVarga, Tamás
dc.contributor.authorVásárhelyi, Lívia
dc.contributor.authorBallai, Gergő
dc.contributor.authorHaspel, Henrik
dc.contributor.authorOszkó, Albert
dc.contributor.authorKukovecz, Ákos
dc.contributor.authorKónya, Zoltán
dc.date.accessioned2019-02-24T08:35:09Z
dc.date.available2019-02-24T08:35:09Z
dc.date.issued2019-01-03
dc.identifier.citationVarga T, Vásárhelyi L, Ballai G, Haspel H, Oszkó A, et al. (2019) Noble-Metal-Free Iron Nitride/Nitrogen-Doped Graphene Composite for the Oxygen Reduction Reaction. ACS Omega 4: 130–139. Available: http://dx.doi.org/10.1021/acsomega.8b02646.
dc.identifier.issn2470-1343
dc.identifier.issn2470-1343
dc.identifier.doi10.1021/acsomega.8b02646
dc.identifier.urihttp://hdl.handle.net/10754/631143
dc.description.abstractConsiderable effort has been devoted recently to replace platinum-based catalysts with their non-noble-metal counterparts in the oxygen reduction reaction (ORR) in fuel cells. Nitrogen-doped carbon structures emerged as possible candidates for this role, and their earth-abundant metal-decorated composites showed great promise. Here, we report on the simultaneous formation of nitrogen-doped graphene and iron nitride from the lyophilized mixture of graphene oxide and iron salt by high-temperature annealing in ammonia atmosphere. A mixture of FeN and FeN particles was formed with average particle size increasing from 23.4 to 127.0 nm and iron content ranging from 5 to 50 wt %. The electrocatalytic oxygen reduction activity was investigated via the rotating disk electrode method in alkaline media. The highest current density of 3.65 mA cm at 1500 rpm rotation rate was achieved in the 20 wt % catalyst via the four-electrode reduction pathway, exceeding the activity of both the pristine iron nitride and the undecorated nitrogen-doped graphene. Since our catalysts showed improved methanol tolerance compared to the platinum-based ones, the formed non-noble-metal system offers a viable alternative to the platinum-decorated carbon black (Pt/CB) ORR catalysts in direct methanol fuel cells.
dc.description.sponsorshipFinancial support from the Hungarian National Research Development and Innovation Office through grants GINOP- 2.3.2-15-2016-00013, NKFIH OTKA K120115 (Z.K.), and K126065 (A.K.) is gratefully acknowledged.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acsomega.8b02646
dc.rightsThis is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_termsofuse.html
dc.titleNoble-Metal-Free Iron Nitride/Nitrogen-Doped Graphene Composite for the Oxygen Reduction Reaction
dc.typeArticle
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalACS Omega
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Applied and Environmental Chemistry, University of Szeged, Rerrich Bela tér 1, H-6720 Szeged, Hungary
dc.contributor.institutionDepartment of Physical Chemistry and Materials Science, University of Szeged, Aradi Vértanúk tere 1, H-6720 Szeged, Hungary
dc.contributor.institutionSZTE “Lendület” Porous Nanocomposites Research Group, Rerrich Béla tér 1, H-6720 Szeged, Hungary
dc.contributor.institutionMTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Rerrich Béla tér 1, H-6720 Szeged, Hungary
kaust.personHaspel, Henrik
refterms.dateFOA2019-02-24T13:06:55Z
dc.date.published-online2019-01-03
dc.date.published-print2019-01-31


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