Atomic layer deposition of Co3O4 nanocrystals on N-doped electrospun carbon nanofibers for oxygen reduction and oxygen evolution reactions

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buir.contributor.authorKhalily, Mohammad Aref
buir.contributor.authorPatil, Bhushan
buir.contributor.authorYılmaz, Eda
buir.contributor.authorUyar, Tamer
buir.contributor.orcidUyar, Tamer|0000-0002-3989-4481
dc.citation.epage1231en_US
dc.citation.issueNumber3en_US
dc.citation.spage1224en_US
dc.citation.volumeNumber1en_US
dc.contributor.authorKhalily, Mohammad Arefen_US
dc.contributor.authorPatil, Bhushanen_US
dc.contributor.authorYılmaz, Edaen_US
dc.contributor.authorUyar, Tameren_US
dc.date.accessioned2020-02-14T13:06:41Z
dc.date.available2020-02-14T13:06:41Z
dc.date.issued2019
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractThe oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are considered as the two crucial reactions in key renewable-energy technologies including fuel cells and water splitting. Despite promising research progress in the preparation of various non-noble metal based electrocatalysts, it is still highly challenging but desirable to develop novel fabrication strategies to synthesize highly active and cost-effective ORR/OER bifunctional electrocatalysts in a precisely controlled manner. Herein, we report atomic layer deposition (ALD) of highly monodisperse Co3O4 nanocrystals of different sizes on N-doped electrospun carbon nanofibers (nCNFs) as high performance bifunctional catalysts (Co@nCNFs) for the ORR and OER. Co@nCNFs (with an average Co3O4 particle size of ∼3 nm) show high ORR performance exhibiting an onset potential of 0.87 V with a low Tafel slope of 119 mV dec−1 approaching that of commercial Pt/C. Similarly, the Co@nCNF electrocatalyst showed remarkable catalytic activity in the OER. The turnover frequency (TOF) value determined at an overpotential of 550 mV for the Co@nCNFs is ∼0.14 s−1 which is ca. 3 and ca. 15-fold higher than those of bulk Co (∼0.05 s−1) and the standard state-of-the-art IrOx (0.0089 s−1) catalyst, respectively. This work will open new possibilities for fabrication of inexpensive non-noble metal materials in highly controlled manner for applications as bifunctional ORR/OER electrocatalysis.en_US
dc.identifier.doi10.1039/c8na00330ken_US
dc.identifier.eissn2516-0230
dc.identifier.urihttp://hdl.handle.net/11693/53371
dc.language.isoEnglishen_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.isversionofhttps://dx.doi.org/10.1039/c8na00330ken_US
dc.source.titleNanoscale Advancesen_US
dc.titleAtomic layer deposition of Co3O4 nanocrystals on N-doped electrospun carbon nanofibers for oxygen reduction and oxygen evolution reactionsen_US
dc.typeArticleen_US
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