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<p>MXenes play a significant role in enhancing the performance of nanomaterials for electrochemical green hydrogen production and efficient energy storage. This study investigates the synthesis and electrochemical properties of ZrV₂O₇/MXene nanocomposite, prepared via hydrothermal synthesis followed by probe-sonication. Comprehensive structural, morphological, and elemental analyses confirm the successful integration of MXene with ZrV₂O₇. Electrochemical evaluations demonstrate that the ZrV₂O₇/MXene composite exhibits superior hydrogen evolution reaction (HER) as inferred from the Tafel slope of 137&#xa0;mV/dec and an overpotential of 219&#xa0;mV to generate a current density of 10&#xa0;mA/cm<sup>2</sup> in an alkaline solution. The material maintains stable performance over 76&#xa0;h under constant current conditions using chronopotentiometry. Besides, the hydrogen evolution efficiency of 6322&#xa0;μmol/h.g was determined using the photocatalytic route for the prepared nanocomposite.&#xa0;GCD reveals that the nanocomposite also exhibits a significant specific capacitance of 225 F/g&#xa0;at a current density of 0.5 A/g.&#xa0;Electrochemical impedance spectroscopy (EIS) analysis indicates low internal resistance, facilitating efficient charge and discharge processes. These findings reveal that the prepared nanocomposite is&#xa0;a&#xa0;promising candidate for both hydrogen evolution and supercapacitor applications.</p>

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Synergistic ZrV2O7/MXene nanocomposite for superior electrochemical hydrogen evolution and energy storage applications

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Shivangini Singh,
  • Suranjana Mukherjee,
  • Naveen Kumar Veldurthi,
  • Sudhanshu Pati

摘要

MXenes play a significant role in enhancing the performance of nanomaterials for electrochemical green hydrogen production and efficient energy storage. This study investigates the synthesis and electrochemical properties of ZrV₂O₇/MXene nanocomposite, prepared via hydrothermal synthesis followed by probe-sonication. Comprehensive structural, morphological, and elemental analyses confirm the successful integration of MXene with ZrV₂O₇. Electrochemical evaluations demonstrate that the ZrV₂O₇/MXene composite exhibits superior hydrogen evolution reaction (HER) as inferred from the Tafel slope of 137 mV/dec and an overpotential of 219 mV to generate a current density of 10 mA/cm2 in an alkaline solution. The material maintains stable performance over 76 h under constant current conditions using chronopotentiometry. Besides, the hydrogen evolution efficiency of 6322 μmol/h.g was determined using the photocatalytic route for the prepared nanocomposite. GCD reveals that the nanocomposite also exhibits a significant specific capacitance of 225 F/g at a current density of 0.5 A/g. Electrochemical impedance spectroscopy (EIS) analysis indicates low internal resistance, facilitating efficient charge and discharge processes. These findings reveal that the prepared nanocomposite is a promising candidate for both hydrogen evolution and supercapacitor applications.