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Insights into the combined effect of coupled CuFeO2/Fe3O4 heterostructured hybrid electrocatalyst for efficient hydrogen evolution in water splitting.

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Title: Insights into the combined effect of coupled CuFeO2/Fe3O4 heterostructured hybrid electrocatalyst for efficient hydrogen evolution in water splitting.
Authors: Anand Kumar, Sandhya1 (AUTHOR), John Kennedy, L.1 (AUTHOR) jksac14@yahoo.co.in
Source: International Journal of Hydrogen Energy. Dec2024, Vol. 96, p1101-1118. 18p.
Subjects: Platinum electrodes, Clean energy, Standard hydrogen electrode, Precious metals, Metal catalysts, Platinum, Oxygen evolution reactions, Hydrogen evolution reactions
Abstract: Hydrogen production via water electrolysis offers a promising route to sustainable energy, but the slow kinetics of the hydrogen evolution reaction (HER) demands efficient, cost-effective electrocatalysts to replace noble metals like platinum. We report a novel CuFeO₂/Fe₃O₄ (CD-SF) nanocomposite synthesized via microwave combustion featuring, heterostructure characterized by X-ray diffraction, X-ray photon spectroscopy, FESEM, and HRTEM. Electrochemical tests of CD-SF on nickel foam in 1 M KOH with Pt coil (Pt-CE) and graphite rod (Gr-CE) counter electrodes show outstanding HER catalytic activity. CD-SF(Pt-CE) achieved a low overpotential of 64.6 mV at current density 10 mA cm−2, with an exchange current density of 6.08 mA cm−2, while CD-SF(Gr-CE) reached 94.6 mV at 10 mA cm−2 with an exchange current density of 8.24 mA cm−2, outperforming many non-noble metal catalysts. Both catalysts exhibited high stability over 12 h of continuous hydrogen generation. This study highlights CD-SF's potential for large-scale industrial water splitting applications. Graphical illustration of three-electrode system with a unique heterostructured CuFeO 2 /Fe 3 O 4 electrocatalyst (developed in-situ via., MWC technique) coated on nickel foam as anode with Ag/AgCl as reference electrode and platinum coil/graphite rod as counter electrode showing excellent electrocatalytic activity for hydrogen evolution reaction in alkaline KOH medium. [Display omitted] • Low-cost CuFeO₂/Fe₃O₄ electrocatalyst synthesized via microwave combustion. • Cu–Fe cations offer abundant active sites, high conductivity, and enhanced HER performance. • Electrocatalyst's Overpotential: 64.6 mV (100% iR) outperforming with Pt vs graphite as counter electrodes. • High stability and durability for 12+ hours under high current densities for HER. • Counter electrode selection improves CuFeO₂/Fe₃O₄ performance for HER operation. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Insights into the combined effect of coupled CuFeO2/Fe3O4 heterostructured hybrid electrocatalyst for efficient hydrogen evolution in water splitting.
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  Data: <searchLink fieldCode="AR" term="%22Anand+Kumar%2C+Sandhya%22">Anand Kumar, Sandhya</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22John+Kennedy%2C+L%2E%22">John Kennedy, L.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> jksac14@yahoo.co.in</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Dec2024, Vol. 96, p1101-1118. 18p.
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  Data: <searchLink fieldCode="DE" term="%22Platinum+electrodes%22">Platinum electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Clean+energy%22">Clean energy</searchLink><br /><searchLink fieldCode="DE" term="%22Standard+hydrogen+electrode%22">Standard hydrogen electrode</searchLink><br /><searchLink fieldCode="DE" term="%22Precious+metals%22">Precious metals</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+catalysts%22">Metal catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Platinum%22">Platinum</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+evolution+reactions%22">Oxygen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Hydrogen production via water electrolysis offers a promising route to sustainable energy, but the slow kinetics of the hydrogen evolution reaction (HER) demands efficient, cost-effective electrocatalysts to replace noble metals like platinum. We report a novel CuFeO₂/Fe₃O₄ (CD-SF) nanocomposite synthesized via microwave combustion featuring, heterostructure characterized by X-ray diffraction, X-ray photon spectroscopy, FESEM, and HRTEM. Electrochemical tests of CD-SF on nickel foam in 1 M KOH with Pt coil (Pt-CE) and graphite rod (Gr-CE) counter electrodes show outstanding HER catalytic activity. CD-SF(Pt-CE) achieved a low overpotential of 64.6 mV at current density 10 mA cm−2, with an exchange current density of 6.08 mA cm−2, while CD-SF(Gr-CE) reached 94.6 mV at 10 mA cm−2 with an exchange current density of 8.24 mA cm−2, outperforming many non-noble metal catalysts. Both catalysts exhibited high stability over 12 h of continuous hydrogen generation. This study highlights CD-SF's potential for large-scale industrial water splitting applications. Graphical illustration of three-electrode system with a unique heterostructured CuFeO 2 /Fe 3 O 4 electrocatalyst (developed in-situ via., MWC technique) coated on nickel foam as anode with Ag/AgCl as reference electrode and platinum coil/graphite rod as counter electrode showing excellent electrocatalytic activity for hydrogen evolution reaction in alkaline KOH medium. [Display omitted] • Low-cost CuFeO₂/Fe₃O₄ electrocatalyst synthesized via microwave combustion. • Cu–Fe cations offer abundant active sites, high conductivity, and enhanced HER performance. • Electrocatalyst's Overpotential: 64.6 mV (100% iR) outperforming with Pt vs graphite as counter electrodes. • High stability and durability for 12+ hours under high current densities for HER. • Counter electrode selection improves CuFeO₂/Fe₃O₄ performance for HER operation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ijhydene.2024.11.310
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 18
        StartPage: 1101
    Subjects:
      – SubjectFull: Platinum electrodes
        Type: general
      – SubjectFull: Clean energy
        Type: general
      – SubjectFull: Standard hydrogen electrode
        Type: general
      – SubjectFull: Precious metals
        Type: general
      – SubjectFull: Metal catalysts
        Type: general
      – SubjectFull: Platinum
        Type: general
      – SubjectFull: Oxygen evolution reactions
        Type: general
      – SubjectFull: Hydrogen evolution reactions
        Type: general
    Titles:
      – TitleFull: Insights into the combined effect of coupled CuFeO2/Fe3O4 heterostructured hybrid electrocatalyst for efficient hydrogen evolution in water splitting.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Anand Kumar, Sandhya
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          Name:
            NameFull: John Kennedy, L.
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            – D: 27
              M: 12
              Text: Dec2024
              Type: published
              Y: 2024
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              Value: 96
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            – TitleFull: International Journal of Hydrogen Energy
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