Publication:
MnO2 nanowires anchored on mesoporous graphitic carbon nitride (MnO2@mpg-C3N4) as a highly efficient electrocatalyst for the oxygen evolution reaction

dc.contributor.coauthorElmacı, Gökhan
dc.contributor.coauthorErtürk, Ali Serol
dc.contributor.coauthorSevim, Melike
dc.contributor.departmentDepartment of Chemistry
dc.contributor.kuauthorMetin, Önder
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.date.accessioned2024-11-09T22:49:45Z
dc.date.issued2019
dc.description.abstractIn the present study, we report the rational design and fabrication of a novel nano composite, namely one-dimensional (1D) MnO2 nanowires grew up in situ within the 2D mesoporous carbon nitride (MnO2@mpg-C3N4), as a highly efficient electrocatalyst for OER. The structural, morphological and thermal properties of as-prepared MnO2@mpg-C3N4 electrocatalyst were characterized by TEM, SEM, XRD, XPS, Raman, ICP-MS, and TGA. The results clearly revealed the formation of 3D-hierarchical heterostructures consisting of 1D MnO2 nanowires anchored on mpg-C3N4. Next, the electrocatalytic performance of MnO2@mpg-C3N4 nanocomposite was tested in OER wherein it exhibited substantially enhanced activity than pristine 1D MnO2 nanowires. In particular, the turnover frequency (TOF) of MnO2@mpg-C3N4 (0.84 s(-1)@480 mV) was found almost three times higher than that of ID MnO2 nanowires (0.32 s(-1)@480 mV). Moreover, the overpotential and Tafel slope values were successfully lowered down by using MnO2@mpg-C3N4 nanocomposite compared to those of 1D MnO2 nanowires. It was experimentally demonstrated that the superior OER performance of the MnO2@mpg-C3N4 is attributed to the effective stabilization of Mn3+ species (Mn2O3) in the electrocatalyst via the help of nitrogen functional groups of mpg-C3N4 and the formation of 3D heterostructure that offers the following three major contributions; i) enhanced aerophobicity due to orientation modifications of growing 1D MnO2 nanowires, ii) open structure facilitating the rapid detachment of gas bubbles from the electrode surface, iii) a large number of transport channels for the penetration of electrolyte, ions and electrons.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue33
dc.description.openaccessNO
dc.description.publisherscopeInternational
dc.description.sponsoredbyTubitakEuN/A
dc.description.sponsorshipO. Metin thanks to Turkish Academy of Science (TUBA) for the € financial support. G. Elmacı has been supported by a grand from The Scientific and Technological Research Council of Turkey (TUBITAK) under the 2219-international Postdoctoral Research Scholarship Program.
dc.description.volume44
dc.identifier.doi10.1016/j.ijhydene.2019.05.089
dc.identifier.eissn1879-3487
dc.identifier.issn0360-3199
dc.identifier.quartileQ2
dc.identifier.scopus2-s2.0-85066467126
dc.identifier.urihttps://doi.org/10.1016/j.ijhydene.2019.05.089
dc.identifier.urihttps://hdl.handle.net/20.500.14288/6557
dc.identifier.wos476964900050
dc.keywordsMesoporous carbon nitride
dc.keywordsManganese oxide
dc.keywordsNanowires
dc.keywordsNanocomposites
dc.keywordsWater splitting
dc.keywordsOxygen evolution reaction (OER)
dc.language.isoeng
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofInternational Journal of Hydrogen Energy
dc.subjectChemistry, physical
dc.subjectElectrochemistry
dc.subjectEnergy and fuels
dc.titleMnO2 nanowires anchored on mesoporous graphitic carbon nitride (MnO2@mpg-C3N4) as a highly efficient electrocatalyst for the oxygen evolution reaction
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorMetin, Önder
local.publication.orgunit1College of Sciences
local.publication.orgunit2Department of Chemistry
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