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<p>Development of low overpotential OER photoelectrocatalysts has caught much attention to delivers the 10 mAcm<sup>− 2</sup> benchmark current density in alkaline medium. Therefore, we designed the highly efficient MOF-based OER photoelectrocatalyst by in-situ introduction of CoO/La<sub>2</sub>O<sub>3</sub> nanocomposite into host NH<sub>2</sub>-UiO-66 via facile solvothermal method. The as prepared CoO/La<sub>2</sub>O<sub>3</sub>@NH<sub>2</sub>-UiO-66 displays efficient photo electrocatalytic OER-activity and required just 195 mV overpotential to deliver 10 mAcm<sup>− 2</sup> current density in 1.0&#xa0;M KOH electrolyte with lower Tafel slope value 73 mVdec<sup>− 1</sup>, which is higher than many of similar kind of OER catalysts. Meanwhile, it also exhibits satisfactory long-term stability. The increased photocatalytic activity of the in-situ incorporated nanomaterials into the host due to the synergistic and hetro-junction formation effect between the incorporated nanocomposite and the MOFs hosts. This designed efficient photoelectrocatalysts encourages the development of the new MOFs-based photoelectrocatalysts with low overpotential for water splitting and many other applications in future. Similarly, CoO/La<sub>2</sub>O<sub>3</sub>@NH<sub>2</sub>-UiO-66 delivered maximum photocatalytic efficiency for the photodegradation of methylene blue (MB) and methyl orange (MO), up to 92% and 87% respectively.</p> Graphical Abstract <p></p>

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Modification of Zr-based NH2-UiO-66 MOF by Incorporation of La2O3-based Nanomaterials as Efficient Photoelectrocatalysts for Oxygen Evolution Reaction (OER) and Photocatalysts for Degradation of Organic Dyes

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Muhammad Kashif,
  • Muhammad Fiaz,
  • Fahmida Jabeen,
  • Muhammad Najam-ul-Haq,
  • Ammara Shabbir,
  • Muhammad Asim Farid,
  • Muhammad Athar

摘要

Development of low overpotential OER photoelectrocatalysts has caught much attention to delivers the 10 mAcm− 2 benchmark current density in alkaline medium. Therefore, we designed the highly efficient MOF-based OER photoelectrocatalyst by in-situ introduction of CoO/La2O3 nanocomposite into host NH2-UiO-66 via facile solvothermal method. The as prepared CoO/La2O3@NH2-UiO-66 displays efficient photo electrocatalytic OER-activity and required just 195 mV overpotential to deliver 10 mAcm− 2 current density in 1.0 M KOH electrolyte with lower Tafel slope value 73 mVdec− 1, which is higher than many of similar kind of OER catalysts. Meanwhile, it also exhibits satisfactory long-term stability. The increased photocatalytic activity of the in-situ incorporated nanomaterials into the host due to the synergistic and hetro-junction formation effect between the incorporated nanocomposite and the MOFs hosts. This designed efficient photoelectrocatalysts encourages the development of the new MOFs-based photoelectrocatalysts with low overpotential for water splitting and many other applications in future. Similarly, CoO/La2O3@NH2-UiO-66 delivered maximum photocatalytic efficiency for the photodegradation of methylene blue (MB) and methyl orange (MO), up to 92% and 87% respectively.

Graphical Abstract