Metal free-covalent triazine frameworks as oxygen reduction reaction catalysts - structure-electrochemical activity relationship

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dc.authoridHamzah, Hairul Hisham/0000-0002-8296-1360
dc.authoridUecker, Jan/0000-0002-4261-4508
dc.authoridStampfer, Christoph/0000-0002-4958-7362
dc.authoridSonmez, Turgut/0000-0002-3927-2551
dc.authoridTitirici, Magdalena/0000-0003-0773-2100
dc.authoridNicolae, Sabina Alexandra/0000-0001-6371-0446
dc.authoridBisswanger, Timo/0000-0001-8147-4010
dc.contributor.authorSonmez, Turgut
dc.contributor.authorBelthle, Kendra Solveig
dc.contributor.authorIemhoff, Andree
dc.contributor.authorUecker, Jan
dc.contributor.authorArtz, Jens
dc.contributor.authorBisswanger, Timo
dc.contributor.authorStampfer, Christoph
dc.date.accessioned2024-09-29T16:01:04Z
dc.date.available2024-09-29T16:01:04Z
dc.date.issued2021
dc.departmentKarabük Üniversitesien_US
dc.description.abstractNitrogen-rich porous carbon polymers are highly promising oxygen reduction reaction (ORR) catalysts and possess great potential to replace Pt-based precious metals used in energy storage and conversion systems. In this study, covalent triazine frameworks (CTFs) were synthesized via an ionothermal route based on different monomers and synthesis temperatures (400-750 degrees C) and tested in alkaline media with a rotating disk electrode (RDE). The effect of the applied monomer and temperature on the surface functionalities of the frameworks and thus correlation to their ORR activities are deeply discussed. Micro/mesoporous, hierarchically ordered and highly conductive N-rich materials with up to 2407 m(2) g(-1) specific surface areas and 2.49 cm(3) g(-1) pore volumes were achievable. Owing to the high surface area (1742 m(2) g(-1)), pore volume (1.56 cm(3) g(-1)), highest conductivity, electrochemically active surface area and hierarchical mesoporous structure, CTF DCBP-750 facilitated 0.9 V onset potential (only 0.06 V larger than that of the benchmark 10 wt% Pt/C) with 5.1 mA cm(-2) limiting current density. In addition to the structural properties, graphitic nitrogen species, active sites responsible for binding and activating O-2, rather than pyridinic nitrogen appear to be more important for the overall ORR performance. Thus, the trade-off point is crucial to obtain optimal ORR activity with metal-free CTFs.en_US
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG, German Research Foundation) [390919832]; Scientific and Technological Research Council of Turkey (TUBITAK), Republic of Turkeyen_US
dc.description.sponsorshipThis study was supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy within the Exzellenzcluster 2186 The Fuel Science Center ID: 390919832. TS acknowledges the receipt of a postdoctoral fellowship from The Scientific and Technological Research Council of Turkey (TUBITAK), Republic of Turkey.en_US
dc.identifier.doi10.1039/d1cy00405k
dc.identifier.endpage6204en_US
dc.identifier.issn2044-4753
dc.identifier.issn2044-4761
dc.identifier.issue18en_US
dc.identifier.scopus2-s2.0-85115693937en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage6191en_US
dc.identifier.urihttps://doi.org/10.1039/d1cy00405k
dc.identifier.urihttps://hdl.handle.net/20.500.14619/5512
dc.identifier.volume11en_US
dc.identifier.wosWOS:000681726900001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherRoyal Soc Chemistryen_US
dc.relation.ispartofCatalysis Science & Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectFree Electrocatalystsen_US
dc.subjectPyridinic-Nitrogenen_US
dc.subjectSpinels Co3o4en_US
dc.subjectCarbonen_US
dc.subjectAlkalineen_US
dc.subjectFeen_US
dc.subjectGrapheneen_US
dc.subjectNanoparticlesen_US
dc.subjectOxidationen_US
dc.subjectOxidesen_US
dc.titleMetal free-covalent triazine frameworks as oxygen reduction reaction catalysts - structure-electrochemical activity relationshipen_US
dc.typeArticleen_US

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