Polyacrylonitrile nanofibers with hollow NiCu, Ni, and Cu nanospheres: Boosting electrocatalysis via enhanced interfacial charge transport and storage

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dc.authoridYermekova, Zhanna/0000-0001-5231-9556
dc.contributor.authorSarac, Baran
dc.contributor.authorKarazehir, Tolga
dc.contributor.authorZadorozhnyy, Vladislav
dc.contributor.authorMoskovskikh, Dmitry
dc.contributor.authorYermekova, Zhanna
dc.contributor.authorGumrukcu, Selin
dc.contributor.authorYuce, Eray
dc.contributor.authorSarac, A. Sezai
dc.date.accessioned2026-02-27T07:33:40Z
dc.date.available2026-02-27T07:33:40Z
dc.date.issued2026
dc.description.abstractMultifunctional catalytic materials combining polymers with nanoparticles (NPs) lie in advancing their long-term stability, scalability, and predictable performance under real-world operating conditions. In this study, polyacrylonitrile (PAN) nanofibers loaded with hollow nickel (Ni), copper (Cu), and nickel-copper (NiCu) nanoparticles were fabricated. X-ray diffraction confirmed crystalline metal phases in the amorphous PAN matrix while indicating that similar to 25 % of Cu as CuO. Spectroscopic analysis revealed alterations in the nitrile and aliphatic stretching bands resulting from NP incorporation. Cu/PAN exhibited a more than twofold increase in the -C-H to -CN bond area, attributed to oxygen-containing functional groups from CuO formation. UV-Vis spectra demonstrated tunable absorbance: NiCu/PAN exhibited the broadest and most intense absorption across 250-500 nm, reflecting strong plasmonic coupling between alloyed particles. Electron microscopy illustrated uniform dispersion of NPs on PAN surface, with all three nanofibers showing continuous and bead-free morphology, while NiCu composites displayed reduced NP agglomeration compared to monometallic counterparts. Electrochemical impedance spectroscopy in 0.1 M LiClO4/ACN highlighted that NiCu/PAN possessed the lowest charge transfer resistance (R-ct approximate to 9.13 x 10(2) Omega cm(2)) and highest double-layer capacitance (C-dl approximate to 43.6 mu F cm(-2)), surpassing Ni/PAN and Cu/PAN analogues. Furthermore, the smallest overpotential at 1 mA cm(-2) (-197 mV) and Tafel curve (similar to 286 mV dec(-1)) were obtained for NiCu/PAN in 1 M KOH. The main objective of this research was to demonstrate that bimetallic interactions in hollow NiCu particles synergistically enhance interfacial charge transport and storage, thereby showing how metal composition and PAN nanofiber integration can optimize polymer-based nanocomposites for energy and environmental applications.
dc.identifier.doi10.1016/j.jmrt.2025.12.030
dc.identifier.endpage374
dc.identifier.issn2238-7854
dc.identifier.issn2214-0697
dc.identifier.startpage363
dc.identifier.urihttp://dx.doi.org/10.1016/j.jmrt.2025.12.030
dc.identifier.urihttps://hdl.handle.net/20.500.14669/4671
dc.identifier.volume41
dc.identifier.wosWOS:001639879800005
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Materials Research and Technology-Jmr&T
dc.relation.publicationcategoryMakale - Uluslararas� Hakemli Dergi - Kurum ��retim Eleman�
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20260302
dc.subjectPolyacrylonitrile
dc.subjectNanofibers
dc.subjectMetal nanospheres
dc.subjectMorphology
dc.subjectElectrochemistry
dc.titlePolyacrylonitrile nanofibers with hollow NiCu, Ni, and Cu nanospheres: Boosting electrocatalysis via enhanced interfacial charge transport and storage
dc.typeArticle

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