Magnetically separable low Pt substituted Co nanoparticles: Investigation of structural, magnetic, and catalytic properties

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dc.authoridKaradag, Faruk/0000-0001-7862-9085
dc.authoridEkicibil, Ahmet/0000-0003-3071-0444
dc.authoridKaya, Dogan/0000-0002-6313-7501
dc.contributor.authorKaya, Dogan
dc.contributor.authorIsik, Hasan Huseyin
dc.contributor.authorIsik, Ilknur Baldan
dc.contributor.authorAdanur, Idris
dc.contributor.authorWang, Yitao
dc.contributor.authorAkyol, Mustafa
dc.contributor.authorKaradag, Faruk
dc.date.accessioned2025-01-06T17:37:13Z
dc.date.available2025-01-06T17:37:13Z
dc.date.issued2022
dc.description.abstractDeveloping multifunctional nanoparticles (NPs) for magnetic and catalytic purposes is crucial for controlling magnetic properties and reducing production costs. We synthesized Co and low Pt loaded CoPt NPs by the modified polyol process. Co and CoPt NPs exhibited coexist fcc and hcp phases which are confirmed with x-ray diffraction and Rietveld refinement analysis. Scanning electron microscopy images revealed the average size of the NPs smaller than 9 nm with a narrow distribution. An irreversible magnetization-temperature behavior of the particles is observed in the modes of zero-field cooled and field cooled with a strong ferromagnetic signal close to 350 K. The field-dependent magnetization up to +/- 5 T was investigated to determine coercive field (H-c), exchange bias (H-E), saturation magnetization (M-s), remanent magnetization (M-r), and the ratio of remanent magnetization to saturation magnetization (M-r/M-s). There is a general decrease in magnetic values due to an increase of both the temperature and the Pt ratio in Co nanoparticles. When the Pt/Co ratio drops to 1%, the sample was measured with the highest H-c value of 648.5 Oe and M-s value of 100 emu/g at 5 K. On the contrary, increasing the concentration of Pt to 10% resulted in a reduction for the M-s value below 40 emu/g. Besides, cyclic voltammetry measurements showed apparent hydrogen reduction in the potential range of -0.91 V and -0.96 V (vs Ag/AgCl) and 10% Pt loaded CoPt NPs exhibits the highest activity after 10th cycles and increase the activity up to 15.80 mA cm(-2) at -1.2 V due to the surfactant.
dc.description.sponsorshipCukurova University, Adana, Turkey [FBA-2018-10412, FAY-2020-12933]
dc.description.sponsorshipThe research is financially supported by Cukurova University, Adana, Turkey, under Scientific Research Funding Grand Numbers: FBA-2018-10412 and FAY-2020-12933.
dc.identifier.doi10.1016/j.physb.2022.413765
dc.identifier.issn0921-4526
dc.identifier.issn1873-2135
dc.identifier.scopus2-s2.0-85124621784
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1016/j.physb.2022.413765
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2140
dc.identifier.volume632
dc.identifier.wosWOS:000820698400009
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofPhysica B-Condensed Matter
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectCoPt nanoparticle
dc.subjectPolyol
dc.subjectXRD
dc.subjectSEM
dc.subjectMagnetization
dc.subjectHydrogen evolution reaction
dc.titleMagnetically separable low Pt substituted Co nanoparticles: Investigation of structural, magnetic, and catalytic properties
dc.typeArticle

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