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<p>Considering environmental issues, which involve climate change and shortage of hydrocarbon resources, the usage of environmentally friendly technologies in energy generation has become essential worldwide. In this regard, water splitting is the best way of renewable energy source. Developing an efficient, high-performance and robust electrocatalyst became a significant goal to improve water splitting. For this purpose, we fabricated CdAl<sub>2</sub>O<sub>4</sub>@PANI (CAO@PANI) composite via hydrothermal approach for oxygen evolution reaction (OER). The CAO@PANI displayed varied morphologies, including nanoparticles of CAO affixed to PANI sheets, which enhance the surface area for adsorption of electrolyte ions. The electrocatalyst based on CAO@PANI nanostructure has enhanced efficiency relative to CAO as indicated by overpotential (η) of 192&#xa0;mV at 10&#xa0;mA/cm<sup>2</sup> j (current density) and remarkable durability (50&#xa0;h). Additionally, CAO@PANI nanostructure exhibits an excellent Tafel plot (36&#xa0;mV/dec) along with reduced charge transfer resistance (<i>R</i><sub>ct</sub> = 3.4 Ω). The fabricated catalyst also demonstrated notable double-layer capacitance (<i>C</i><sub>dl</sub> = 48 mF/cm<sup>2</sup>) and greater electrochemically active surface area (ECSA = 1200 cm<sup>2</sup>). The excellent outcomes may be associated to the combined effect of CAO and PANI, which has a distinctive π-conjugated framework and a variety of nitrogen species with lone pairs of electrons. This configuration facilitates a steady flow of OH<sup>−</sup> ion and enhances its adsorption capacity on the surface of CAO@PANI, making it a remarkably effective and reliable catalyst for OER.</p>

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Facile fabrication of CdAl2O4 adorned on polyaniline for improving oxygen evolution process in basic media

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • Iqra Bibi,
  • Samira Elaissi,
  • Tahani Rahil Aldhafeeri,
  • Syed Kashif Ali,
  • Kiran Tahir,
  • Abhinav Kumar

摘要

Considering environmental issues, which involve climate change and shortage of hydrocarbon resources, the usage of environmentally friendly technologies in energy generation has become essential worldwide. In this regard, water splitting is the best way of renewable energy source. Developing an efficient, high-performance and robust electrocatalyst became a significant goal to improve water splitting. For this purpose, we fabricated CdAl2O4@PANI (CAO@PANI) composite via hydrothermal approach for oxygen evolution reaction (OER). The CAO@PANI displayed varied morphologies, including nanoparticles of CAO affixed to PANI sheets, which enhance the surface area for adsorption of electrolyte ions. The electrocatalyst based on CAO@PANI nanostructure has enhanced efficiency relative to CAO as indicated by overpotential (η) of 192 mV at 10 mA/cm2 j (current density) and remarkable durability (50 h). Additionally, CAO@PANI nanostructure exhibits an excellent Tafel plot (36 mV/dec) along with reduced charge transfer resistance (Rct = 3.4 Ω). The fabricated catalyst also demonstrated notable double-layer capacitance (Cdl = 48 mF/cm2) and greater electrochemically active surface area (ECSA = 1200 cm2). The excellent outcomes may be associated to the combined effect of CAO and PANI, which has a distinctive π-conjugated framework and a variety of nitrogen species with lone pairs of electrons. This configuration facilitates a steady flow of OH− ion and enhances its adsorption capacity on the surface of CAO@PANI, making it a remarkably effective and reliable catalyst for OER.