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<p>Alkaline water oxidation is an electrocatalytic method with the potential for generating renewable energy. The development of robust, superior-performing and affordable electrocatalysts has emerged as a crucial objective in enhancing water-splitting efficiency. To boost OER process, we synthesized the CuSm<sub>2</sub>O<sub>4</sub>-rGO nanocomposite through a hydrothermal approach. Different analytical procedures were conducted to evaluate the structural, morphological and surface area of the prepared nanomaterial. The electrochemical measurements indicated that the synthesized CuSm<sub>2</sub>O<sub>4</sub>-rGO nanomaterial revealed a reduced Tafel value (36 mV/dec) and decreased overpotential (η) of 212 mV for OER. Improved electrochemical- efficiency could be attained via obtaining experimental data on active sites and increased conductance through electrochemical impedance spectroscopy (EIS), demonstrating that CuSm<sub>2</sub>O<sub>4</sub>-rGO nanocomposite had a reduced solution resistance (R<sub>s</sub> = 1.28 Ω), thus enhancing active regions for OER. The durability of the catalyst was assessed over a 50&#xa0;h duration employing chronoamperometry and cyclic durability testing. The CuSm<sub>2</sub>O<sub>4</sub>-rGO nanocomposite is a viable choice for OER because of its outstanding electrocatalytic characteristics.</p>

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Spinel Nanostructure Supported on Reduced Graphene (rGO) Nanosheets as Efficient Electrocatalyst for Oxygen Evolution Reaction

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • Lamia Abu El Maati,
  • Muneerah Alomar,
  • Haifa A. Al-Yousef,
  • Hafiz Muhammad Tahir Farid,
  • Salma Aman,
  • Sara M. Bin Najefan

摘要

Alkaline water oxidation is an electrocatalytic method with the potential for generating renewable energy. The development of robust, superior-performing and affordable electrocatalysts has emerged as a crucial objective in enhancing water-splitting efficiency. To boost OER process, we synthesized the CuSm2O4-rGO nanocomposite through a hydrothermal approach. Different analytical procedures were conducted to evaluate the structural, morphological and surface area of the prepared nanomaterial. The electrochemical measurements indicated that the synthesized CuSm2O4-rGO nanomaterial revealed a reduced Tafel value (36 mV/dec) and decreased overpotential (η) of 212 mV for OER. Improved electrochemical- efficiency could be attained via obtaining experimental data on active sites and increased conductance through electrochemical impedance spectroscopy (EIS), demonstrating that CuSm2O4-rGO nanocomposite had a reduced solution resistance (Rs = 1.28 Ω), thus enhancing active regions for OER. The durability of the catalyst was assessed over a 50 h duration employing chronoamperometry and cyclic durability testing. The CuSm2O4-rGO nanocomposite is a viable choice for OER because of its outstanding electrocatalytic characteristics.