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<p>A cost-effective and high-performance LaNiO<sub>3</sub>/rGO nanocomposite electrode was fabricated for effectual H<sub>2</sub> evolution in alkaline media. The combinition of LaNiO<sub>3</sub> nanoparticles with conductive rGO sheets created a porous 3D network, providing abundant catalytic sites and rapid electron transport channels. Electrochemical tests (1&#xa0;M KOH) confirmed that LaNiO<sub>3</sub>/rGO electrode significantly outperforms pristine LaNiO<sub>3</sub>, displaying a low ƞ (191 mV) at 10&#xa0;mA/cm<sup>2</sup> and Tafel plot (40 mV/dec), suggesting that HER follows the Heyrovsky pathway. Physical analyses confirmed uniform nanoparticle distribution on rGO and a stable perovskite crystalline structure, ensuring structural integrity during extended operation. The synergistic combination of LaNiO<sub>3</sub> and rGO enhances the active surface area and promotes efficient electron–proton transfer, leading to superior HER activity and long-term stability. These results highlight LaNiO<sub>3</sub>/rGO as a capable catalyst for renewable H<sub>2</sub> production and energy applications.</p>

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Enhanced hydrogen evolution reaction performance of LaNiO3/rGO hybrid electrocatalyst in alkaline medium

  • 期刊论文

  • 发表日期：

    2026年6月24日

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  • Meshal Fatima,
  • Shaimaa A. M. Abdelmohsen,
  • Meznah M. Alanazi,
  • Abhinav Kumar,
  • Nadeem Raza,
  • Eman Alzahrani,
  • Hamud A. Altaleb,
  • Reda A. Haggam

摘要

A cost-effective and high-performance LaNiO3/rGO nanocomposite electrode was fabricated for effectual H2 evolution in alkaline media. The combinition of LaNiO3 nanoparticles with conductive rGO sheets created a porous 3D network, providing abundant catalytic sites and rapid electron transport channels. Electrochemical tests (1 M KOH) confirmed that LaNiO3/rGO electrode significantly outperforms pristine LaNiO3, displaying a low ƞ (191 mV) at 10 mA/cm2 and Tafel plot (40 mV/dec), suggesting that HER follows the Heyrovsky pathway. Physical analyses confirmed uniform nanoparticle distribution on rGO and a stable perovskite crystalline structure, ensuring structural integrity during extended operation. The synergistic combination of LaNiO3 and rGO enhances the active surface area and promotes efficient electron–proton transfer, leading to superior HER activity and long-term stability. These results highlight LaNiO3/rGO as a capable catalyst for renewable H2 production and energy applications.