Effect of Gd-doping in Ni/NiO core/shell magnetic nanoparticles (MNPs) on structural, magnetic, and hydrogen evolution reaction

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dc.authoridDogru Mert, Basak/0000-0002-2270-9032
dc.authoridEkicibil, Ahmet/0000-0003-3071-0444
dc.contributor.authorAdanur, Idris
dc.contributor.authorKarazehir, Tolga
dc.contributor.authorDogru Mert, Basak
dc.contributor.authorAkyol, Mustafa
dc.contributor.authorEkicibil, Ahmet
dc.date.accessioned2025-01-06T17:45:05Z
dc.date.available2025-01-06T17:45:05Z
dc.date.issued2022
dc.description.abstractIn this study, Gd-x-doped Ni/NiO MNPs (x: 0.0%, 2.5%, 5.0%, and 10.0%) with a protective polyvinylpyrrolidone (PVP) layer have been synthesized via a polyol reduction process. The x-ray diffraction patterns revealed that samples have a cubic structure with Fm3m space group and no change in the crystallite structure was observed with doping Gd3+ ions. The crystallite size (D-c) decreases from 2.70 to 1.27 nm when Gd is doped into Ni/NiO MNPs. Transmission electron microscopy analysis revealed that the Ni/NiO MNPs with Gd(5%) concentration are formed as spherical multicore-like shape core/shell MNPs with a protective PVP layer. The magnetic hysteresis measurements taken at 10 and 300 K show that the saturation magnetization (M-s) decreases with increasing Gd3+ ions in the structure. The highest effective magnetic moment (mu(eff)) was obtained as 10.34 mu(B) in the NG-2 sample. We ascribe that the high mu(eff) value in this sample is due to the increase in d-f exchange interaction between Ni(3d(7)) and Gd(4f(7)) and the contribution of the dipole moment of PVP molecules. The electrochemical measurements showed that the current density values were 0.294 and 0.319 mA/cm(2) at-1.3 V in the absence of Gd (NG-0) and Gd(5%) doped (NG-2) samples, respectively. beta c was 159 and 132 mV/dec for NG-0 and NG-2 samples, respectively. The diminishing of beta c and the charge resistance (Rct) proved that the Gd doped catalyst enhanced the hydrogen evolution activity and the Gd(5%) doped sample exhibited the highest catalyst performance.
dc.description.sponsorshipCukurova University (Adana/Turkey) [FDK-2019-11498]; Scientific and Technological Research Council of Turkey (TUBITAK) [2211-C]; Council of Higher Education [100/2000]
dc.description.sponsorshipThis work was supported by Cukurova University (Adana/Turkey) under Project No. FDK-2019-11498. I.A. acknowledges the Scientific and Technological Research Council of Turkey (TUBITAK) (Project No. 2211-C) and the Council of Higher Education (Project No. 100/2000) for financial support.
dc.identifier.doi10.1063/5.0078718
dc.identifier.issn0021-9606
dc.identifier.issn1089-7690
dc.identifier.issue6
dc.identifier.pmid35168345
dc.identifier.scopus2-s2.0-85124680048
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1063/5.0078718
dc.identifier.urihttps://hdl.handle.net/20.500.14669/3291
dc.identifier.volume156
dc.identifier.wosWOS:000753834300003
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherAip Publishing
dc.relation.ispartofJournal of Chemical Physics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectNıo Nanopartıcles
dc.subjectDynamıcs
dc.subjectCo
dc.subjectResonance
dc.subjectFe
dc.subjectCe
dc.subjectAbsorptıon
dc.subjectTransıtıon
dc.subjectPolymer
dc.subjectMoment
dc.titleEffect of Gd-doping in Ni/NiO core/shell magnetic nanoparticles (MNPs) on structural, magnetic, and hydrogen evolution reaction
dc.typeArticle

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