Publication: MnO2 nanowires anchored on mesoporous graphitic carbon nitride (MnO2@mpg-C3N4) as a highly efficient electrocatalyst for the oxygen evolution reaction
dc.contributor.coauthor | Elmacı, Gökhan | |
dc.contributor.coauthor | Ertürk, Ali Serol | |
dc.contributor.coauthor | Sevim, Melike | |
dc.contributor.department | Department of Chemistry | |
dc.contributor.kuauthor | Metin, Önder | |
dc.contributor.schoolcollegeinstitute | College of Sciences | |
dc.date.accessioned | 2024-11-09T22:49:45Z | |
dc.date.issued | 2019 | |
dc.description.abstract | In 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.indexedby | WOS | |
dc.description.indexedby | Scopus | |
dc.description.issue | 33 | |
dc.description.openaccess | NO | |
dc.description.publisherscope | International | |
dc.description.sponsoredbyTubitakEu | N/A | |
dc.description.sponsorship | O. 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.volume | 44 | |
dc.identifier.doi | 10.1016/j.ijhydene.2019.05.089 | |
dc.identifier.eissn | 1879-3487 | |
dc.identifier.issn | 0360-3199 | |
dc.identifier.quartile | Q2 | |
dc.identifier.scopus | 2-s2.0-85066467126 | |
dc.identifier.uri | https://doi.org/10.1016/j.ijhydene.2019.05.089 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14288/6557 | |
dc.identifier.wos | 476964900050 | |
dc.keywords | Mesoporous carbon nitride | |
dc.keywords | Manganese oxide | |
dc.keywords | Nanowires | |
dc.keywords | Nanocomposites | |
dc.keywords | Water splitting | |
dc.keywords | Oxygen evolution reaction (OER) | |
dc.language.iso | eng | |
dc.publisher | Pergamon-Elsevier Science Ltd | |
dc.relation.ispartof | International Journal of Hydrogen Energy | |
dc.subject | Chemistry, physical | |
dc.subject | Electrochemistry | |
dc.subject | Energy and fuels | |
dc.title | MnO2 nanowires anchored on mesoporous graphitic carbon nitride (MnO2@mpg-C3N4) as a highly efficient electrocatalyst for the oxygen evolution reaction | |
dc.type | Journal Article | |
dspace.entity.type | Publication | |
local.contributor.kuauthor | Metin, Önder | |
local.publication.orgunit1 | College of Sciences | |
local.publication.orgunit2 | Department of Chemistry | |
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