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<p>The fabrication of low cost and stable electrocatalysts for OER (oxygen evolution reaction) may be achieved by incorporating transition metal sulfides with conductive polymers, especially polyaniline. The present study investigates the hydrothermal synthesis of Ni<sub>3</sub>S<sub>2</sub>@PANI composite for OER activity. The composite material shows characteristics of a much greater surface area and an electrochemically active surface area (381 cm<sup>2</sup>). For electrocatalytic performance, material performed very well at 10 mA cm<sup>–2</sup> j (current density), showing a low η overpotential (230 mV) and Tafel slope (39 mV dec<sup>–1</sup>) in basic medium (1.0 <span>M KOH</span>). The prepared sample exhibited remarkable long-term durability, maintaining its efficiency over 30 h of endurance testing and after 3000 cycles, with a minimal <i>R</i><sub>ct</sub> value (0.44 Ω), indicating superior cyclic durability and low impedance. Furthermore, the integration of PANI effectively enlarged surface area and enhanced the electrical conductivity of material, resulting in a marked advancement in its OER performance. These strategic modifications elevated Ni<sub>3</sub>S<sub>2</sub>@PANI electrocatalyst’s efficiency, rendering it as a strong candidate for advanced water-splitting technologies.</p><p></p>

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Hydrothermal preparation of nickel sulphide/PANI electrocatalyst for accelerating oxygen evolution reaction

  • 期刊论文

  • 发表日期：

    2025年10月6日

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  • Kiran Tahir,
  • Hala A. Elzilal,
  • Hala M. Abo-Dief,
  • Hidayath Mirza,
  • Abhinav Kumar

摘要

The fabrication of low cost and stable electrocatalysts for OER (oxygen evolution reaction) may be achieved by incorporating transition metal sulfides with conductive polymers, especially polyaniline. The present study investigates the hydrothermal synthesis of Ni3S2@PANI composite for OER activity. The composite material shows characteristics of a much greater surface area and an electrochemically active surface area (381 cm2). For electrocatalytic performance, material performed very well at 10 mA cm–2 j (current density), showing a low η overpotential (230 mV) and Tafel slope (39 mV dec–1) in basic medium (1.0 M KOH). The prepared sample exhibited remarkable long-term durability, maintaining its efficiency over 30 h of endurance testing and after 3000 cycles, with a minimal Rct value (0.44 Ω), indicating superior cyclic durability and low impedance. Furthermore, the integration of PANI effectively enlarged surface area and enhanced the electrical conductivity of material, resulting in a marked advancement in its OER performance. These strategic modifications elevated Ni3S2@PANI electrocatalyst’s efficiency, rendering it as a strong candidate for advanced water-splitting technologies.