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<p>A modified hydrothermal approach was employed for the synthesis of Pb<sub>3</sub>O<sub>4</sub>-based, (Pb<sub>3</sub>O<sub>4</sub>-Co<sub>3</sub>O<sub>4</sub> and Pb<sub>3</sub>O<sub>4</sub>-CuO) nanocomposites. The prepared electrode materials were successfully assessed for their supercapacitor performance and oxygen evolution reaction (OER) activity. The scanning electron microscope (SEM) visualized the formation of uniform, granular and interconnected sheets structures, while transmission electron microscope (TEM) ensured a petal-like structural morphology which enhances the surface area and active site accessibility, that are crucial for increasing electrochemical excellence. Interestingly, the Pb<sub>3</sub>O<sub>4</sub>-Co<sub>3</sub>O<sub>4</sub> and Pb<sub>3</sub>O<sub>4</sub>-CuO electrodes showed specific capacitances of 867 and 1308 F/g, respectively, along with superior energy densities values of 30.09 and 45.42 Wh/kg. The Pb<sub>3</sub>O<sub>4</sub>-CuO electrode material showed exceptional cycling performance and retention of 96.03% after excessive cyclic voltammetry cycles. Similarly, Pb<sub>3</sub>O<sub>4</sub>-CuO also depicted excellent cathodic and anodic b-values of 0.75 and 0.77, respectively. Moreover, the oxygen evolution reaction assessed overpotential value of 315&#xa0;mV and 182&#xa0;mV for Pb<sub>3</sub>O<sub>4</sub>-Co<sub>3</sub>O<sub>4</sub> and Pb<sub>3</sub>O<sub>4</sub>-CuO nanocomposites, respectively. Additionally, the synthesized binary composites demonstrate excellent Tafel slope value of 79&#xa0;mV/dec and 43&#xa0;mV/dec for Pb₃O₄/Co₃O₄ and Pb<sub>3</sub>O<sub>4</sub>/CuO, respectively. Similarly, the electrochemical active surface area (ECSA) of Pb<sub>3</sub>O<sub>4</sub>/CuO and Pb<sub>3</sub>O<sub>4</sub>/Co<sub>3</sub>O<sub>4</sub> was calculated 606.5 cm<sup>2</sup> and 368.4 cm<sup>2</sup>, respectively. The Pb<sub>3</sub>O<sub>4</sub>-CuO nanocomposite showed multifunctional excellence as improved capacitance, energy density, and water splitting systems.</p>

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One-pot Hydrothermal Synthesis of Petal-like Pb3O4/CuO and Pb3O4/Co3O4 Nanostructures for High Performance Supercapacitor and Oxygen Evolution Reaction

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Ayesha Manzoor,
  • Zeshan Ali Sandhu,
  • Muhammad Danish,
  • Rabia Abbas,
  • Muhammad Shahid,
  • Muhammad Asam Raza,
  • Aeysha Sultan,
  • Munawar Iqbal,
  • Fatimah M. Alzahrani,
  • Wissem Mnif

摘要

A modified hydrothermal approach was employed for the synthesis of Pb3O4-based, (Pb3O4-Co3O4 and Pb3O4-CuO) nanocomposites. The prepared electrode materials were successfully assessed for their supercapacitor performance and oxygen evolution reaction (OER) activity. The scanning electron microscope (SEM) visualized the formation of uniform, granular and interconnected sheets structures, while transmission electron microscope (TEM) ensured a petal-like structural morphology which enhances the surface area and active site accessibility, that are crucial for increasing electrochemical excellence. Interestingly, the Pb3O4-Co3O4 and Pb3O4-CuO electrodes showed specific capacitances of 867 and 1308 F/g, respectively, along with superior energy densities values of 30.09 and 45.42 Wh/kg. The Pb3O4-CuO electrode material showed exceptional cycling performance and retention of 96.03% after excessive cyclic voltammetry cycles. Similarly, Pb3O4-CuO also depicted excellent cathodic and anodic b-values of 0.75 and 0.77, respectively. Moreover, the oxygen evolution reaction assessed overpotential value of 315 mV and 182 mV for Pb3O4-Co3O4 and Pb3O4-CuO nanocomposites, respectively. Additionally, the synthesized binary composites demonstrate excellent Tafel slope value of 79 mV/dec and 43 mV/dec for Pb₃O₄/Co₃O₄ and Pb3O4/CuO, respectively. Similarly, the electrochemical active surface area (ECSA) of Pb3O4/CuO and Pb3O4/Co3O4 was calculated 606.5 cm2 and 368.4 cm2, respectively. The Pb3O4-CuO nanocomposite showed multifunctional excellence as improved capacitance, energy density, and water splitting systems.