A New Redox Mediator (Cupric-Neocuproine Complex)-Modified Pencil Graphite Electrode for the Electrocatalytic Oxidation of H2O2: A Flow Injection Amperometric Sensor

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dc.authoridEmir, Gamze/0000-0002-3976-2243
dc.authoridAPAK, Resat/0000-0003-1739-5814
dc.authoridDilgin, Yusuf/0000-0002-2980-6871
dc.contributor.authorEmir, Gamze
dc.contributor.authorDilgin, Yusuf
dc.contributor.authorApak, Resat
dc.date.accessioned2025-01-27T20:14:19Z
dc.date.available2025-01-27T20:14:19Z
dc.date.issued2020
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis paper introduces the cupric-neocuproine complex ([Cu(Nc)(2)](2+)) as a new redox mediator for the electrocatalytic oxidation of H2O2. For this purpose, [Cu(Nc)(2)](2+) was modified onto a disposable pencil graphite electrode (PGE) surface by using Nafion (Nf) as a cation-exchange membrane for the effective adsorption of complex. The modified electrode was prepared by immersing Nf-adsorbed PGE into [Cu(Nc)(2)](2+) complex solution (0.40 mM of Cu2+ and 0.80 mM of Nc prepared at pH 4.76 in 0.10 M acetate buffer). SEM images and EDX spectra of electrodes were presented for the elucidation of their surface morphologies. Cyclic voltammetric results showed that H2O2 was electrocatalytically oxidized at [Cu(Nc)(2)](2+)/Nf/PGE, because both the increase in current and the potential shift to a more negative direction were observed for oxidation of H2O2 at [Cu(Nc)(2)](2+)/Nf/PGE in comparison to bare PGE. Then, the electrocatalytic activity of [Cu(Nc)(2)](2+)/Nf/PGE toward H2O2 oxidation was utilized for amperometric determination of H2O2 in flow injection analysis (FIA) system. Flow injection (FI) amperometric studies showed two linear calibration ranges (1.0-1000.0 mu M (R-2=0.9958) and 1000.0-10000.0 mu M (R-2=0.9902) with a detection limit of 0.4 mu M H2O2 which is considered good for electroanalytical determinations, especially for electrocatalytic oxidation. To test the applicability of the developed FI amperometric hydrogen peroxide sensor, H2O2 contents of some relevant samples were determined.
dc.identifier.doi10.1002/celc.201901765
dc.identifier.issn2196-0216
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85077886697
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1002/celc.201901765
dc.identifier.urihttps://hdl.handle.net/20.500.12428/21046
dc.identifier.volume7
dc.identifier.wosWOS:000505820200001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherWiley-V C H Verlag Gmbh
dc.relation.ispartofChemelectrochem
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjecthydrogen peroxide
dc.subjectcupric-neocuproine complex
dc.subjectnafion
dc.subjectpencil graphite electrode
dc.subjectflow injection analysis
dc.titleA New Redox Mediator (Cupric-Neocuproine Complex)-Modified Pencil Graphite Electrode for the Electrocatalytic Oxidation of H2O2: A Flow Injection Amperometric Sensor
dc.typeArticle

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