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<p>The development of magnetic nanoferrites for clean energy is seen as a feasible approach to address serious concerns of ecological contamination as well as the energy crisis. Water splitting via photo/electro catalysis is a potential approach for the production of green hydrogen. The current work describes the preparation of Cu<sub>0.6</sub>Zn<sub>0.4-x</sub>Co<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> (x = 0.00–0.03, interval = 0.01) via the sol-gel auto-combustion (SG) technique for hydrogen generation by electro/photo catalytic water splitting. X-ray diffraction (XRD) data verify that all the catalysts have a cubic polycrystalline nature and spinel symmetry within the Fd3m space group, without any impurity phases. The Cu<sub>0.6</sub>Zn<sub>0.4</sub>Fe<sub>2</sub>O<sub>4</sub> (x = 0.00) sample shows the highest photocatalytic hydrogen evolution of 16.56 <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10971_2025_6809_Article_IEq1.gif" Format="GIF" Height="21" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">\({\rm{mmol}}{{\rm{g}}}_{{\rm{cat}}}^{-1}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi mathvariant="normal">mmol</mi> <msubsup> <mrow> <mi mathvariant="normal">g</mi> </mrow> <mrow> <mi mathvariant="normal">cat</mi> </mrow> <mrow> <mo>−</mo> <mn>1</mn> </mrow> </msubsup> </mrow> </math></EquationSource> </InlineEquation>. However, the doped Cu<sub>0.6</sub>Zn<sub>0.38</sub>Co<sub>0.02</sub>Fe<sub>2</sub>O<sub>4</sub> (x = 0.02) catalyst furthermore show an enhancement in the electrocatalytic HER performance as compared to that of Cu<sub>0.6</sub>Zn<sub>0.4</sub>Fe<sub>2</sub>O<sub>4</sub> catalyst. Nonetheless, all samples showed strong photo/electro catalytic performance for hydrogen evolution, demonstrating a strategy for systematically enhancing the catalytic performance by designing catalysts with optimum stoichiometry.</p> Graphical Abstract <p></p>

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Sol-gel fabricated Cu0.6Zn0.4-xCoxFe2O4 spinel ferrite based nano catalysts for green hydrogen generation

  • 期刊论文

  • 发表日期：

    2025年6月10日

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  • Rohit Jasrotia,
  • Prakash Kanjariya,
  • Piyus Kumar Pathak,
  • Jahangeer Ahmed,
  • Mohd Fazil,
  • Tokeer Ahmad,
  • Saad M. Alshehri,
  • Natrayan Lakshmaiya,
  • Vaseem Raja,
  • Pradip K. Maji

摘要

The development of magnetic nanoferrites for clean energy is seen as a feasible approach to address serious concerns of ecological contamination as well as the energy crisis. Water splitting via photo/electro catalysis is a potential approach for the production of green hydrogen. The current work describes the preparation of Cu0.6Zn0.4-xCoxFe2O4 (x = 0.00–0.03, interval = 0.01) via the sol-gel auto-combustion (SG) technique for hydrogen generation by electro/photo catalytic water splitting. X-ray diffraction (XRD) data verify that all the catalysts have a cubic polycrystalline nature and spinel symmetry within the Fd3m space group, without any impurity phases. The Cu0.6Zn0.4Fe2O4 (x = 0.00) sample shows the highest photocatalytic hydrogen evolution of 16.56 \({\rm{mmol}}{{\rm{g}}}_{{\rm{cat}}}^{-1}\) mmol g cat − 1 . However, the doped Cu0.6Zn0.38Co0.02Fe2O4 (x = 0.02) catalyst furthermore show an enhancement in the electrocatalytic HER performance as compared to that of Cu0.6Zn0.4Fe2O4 catalyst. Nonetheless, all samples showed strong photo/electro catalytic performance for hydrogen evolution, demonstrating a strategy for systematically enhancing the catalytic performance by designing catalysts with optimum stoichiometry.

Graphical Abstract