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<p>Environmental damage and energy scarcity are global challenges that necessitate the adoption of alternative energy sources to minimize dependence on conventional energy sources. Electrochemical water oxidation is an innovative method for producing renewable energy through hydrogen fuel; nevertheless, sluggish kinetics of OER (oxygen evolution reaction) restrict its effective use. The present work included the preparation of MgNiO<sub>2</sub>/rGO nanohybrid through a hydrothermal method to improve the OER activity. The MgNiO<sub>2</sub>/rGO composite exhibited diverse shapes, with MgNiO<sub>2</sub> nanoparticles anchored within rGO nanosheets, hence enhancing the active surface area for electrolytic ions. The developed composite (MgNiO<sub>2</sub>/rGO) exhibited superior performance compared to MgNiO<sub>2</sub>, evidenced by its lowered overpotential (η) 209 mV at j (current density) 10&#xa0;mA/cm², along with exceptional endurance (50&#xa0;h). The electrocatalyst demonstrated ECSA (electrochemically active surface area) 275&#xa0;cm², having a Tafel slope (34 mV/dec). The exceptional performance of composite material is the consequence of the interaction between MgNiO<sub>2</sub> and rGO, as this contact enhances electron transfer. The unique electrical configuration of MgNiO<sub>2</sub> enhances the rate of the oxygen evolution reaction, indicating its viability as an economical and sustainable alternative to noble metal catalysts. As a whole, this work could lead to the development of a novel MgNiO<sub>2</sub>/rGO nanohybrid, which would be a potential electrode for many further applications.</p>

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Investigating the Electrochemical Performance of MgNiO2/rGO Fabricated Via the Hydrothermal Approach for OER

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • Khansa Ashfaq,
  • F. F. Alharbi,
  • Abhinav Kumar,
  • Muhammad Faizan,
  • Bhavesh Kanabar,
  • Nagappan Beemkumar,
  • Premananda Pradhan,
  • Tushar Aggarwal,
  • Mohammed A. Al-Anber,
  • Ankit D. Oza

摘要

Environmental damage and energy scarcity are global challenges that necessitate the adoption of alternative energy sources to minimize dependence on conventional energy sources. Electrochemical water oxidation is an innovative method for producing renewable energy through hydrogen fuel; nevertheless, sluggish kinetics of OER (oxygen evolution reaction) restrict its effective use. The present work included the preparation of MgNiO2/rGO nanohybrid through a hydrothermal method to improve the OER activity. The MgNiO2/rGO composite exhibited diverse shapes, with MgNiO2 nanoparticles anchored within rGO nanosheets, hence enhancing the active surface area for electrolytic ions. The developed composite (MgNiO2/rGO) exhibited superior performance compared to MgNiO2, evidenced by its lowered overpotential (η) 209 mV at j (current density) 10 mA/cm², along with exceptional endurance (50 h). The electrocatalyst demonstrated ECSA (electrochemically active surface area) 275 cm², having a Tafel slope (34 mV/dec). The exceptional performance of composite material is the consequence of the interaction between MgNiO2 and rGO, as this contact enhances electron transfer. The unique electrical configuration of MgNiO2 enhances the rate of the oxygen evolution reaction, indicating its viability as an economical and sustainable alternative to noble metal catalysts. As a whole, this work could lead to the development of a novel MgNiO2/rGO nanohybrid, which would be a potential electrode for many further applications.