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<p>To accomplish the goal of replacing fossil fuels and to report global energy crises, the primary focus of this work is the creation of highly efficient and long-lasting electrocatalysts. Here, we created MnCo<sub>2</sub>O<sub>4</sub>/PANI composite via a hydrothermal process which is advantageous due to its low cost, accessibility and improved catalytic activity that supports OER. The electrocatalyst’s structural, morphological and thermal characteristics were ascertained using XRD, SEM and TGA techniques. XRD examination verified the successful incorporation of the composite by showing separate peaks corresponding to both components. Additionally, according to electrochemical analysis, MnCo<sub>2</sub>O<sub>4</sub>/PANI composite has exceptional rate performance in an alkaline medium, exhibiting a decreased overpotential of 202&#xa0;mV and a Tafel value of 39&#xa0;mV dec<sup>−1</sup> at 10&#xa0;mA&#xa0;cm<sup>−2</sup>. The electrochemically active surface area (ECSA) was given as 910 cm<sup>2</sup>. Moreover, the composite maintains its existing density for 35&#xa0;h while demonstrating steady stability. Due to its extraordinary stability, rapid electron transfer mechanism and abundance of active sites, the described composite has great promise for OER. In addition to demonstrating potential for improving water oxidation by compositing techniques, this study highlights the importance of OER with the produced composite functioning as an electrocatalyst.</p>

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Fabrication of MnCo2O4 by hydrothermal process supported with polyaniline (PANI) as effective electrocatalyst for oxygen evolution reaction (OER)

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • Mah Noor Ali,
  • Nawal K. Almaymoni,
  • Hussain Sawwan,
  • Hala M. Abo-Dief,
  • Abhinav Kumar,
  • Rizwan Ul Hassan

摘要

To accomplish the goal of replacing fossil fuels and to report global energy crises, the primary focus of this work is the creation of highly efficient and long-lasting electrocatalysts. Here, we created MnCo2O4/PANI composite via a hydrothermal process which is advantageous due to its low cost, accessibility and improved catalytic activity that supports OER. The electrocatalyst’s structural, morphological and thermal characteristics were ascertained using XRD, SEM and TGA techniques. XRD examination verified the successful incorporation of the composite by showing separate peaks corresponding to both components. Additionally, according to electrochemical analysis, MnCo2O4/PANI composite has exceptional rate performance in an alkaline medium, exhibiting a decreased overpotential of 202 mV and a Tafel value of 39 mV dec−1 at 10 mA cm−2. The electrochemically active surface area (ECSA) was given as 910 cm2. Moreover, the composite maintains its existing density for 35 h while demonstrating steady stability. Due to its extraordinary stability, rapid electron transfer mechanism and abundance of active sites, the described composite has great promise for OER. In addition to demonstrating potential for improving water oxidation by compositing techniques, this study highlights the importance of OER with the produced composite functioning as an electrocatalyst.