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<p>Rationally designed multifunctional nanocomposites are emerging as key solutions for advancing both high-performance supercapacitors and electrochemical biosensors. In this study, a novel ternary FeMoO<sub>4</sub>/rGO/PANI nanocomposite was synthesized via a hydrothermal method and evaluated for its dual applicability in electrochemical energy storage and uric acid detection. The modified glassy carbon electrode (GCE) exhibited a strong electrochemical response to varying uric acid concentrations in phosphate buffer solution, as evidenced by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The composite exhibited an outstanding limit of detection (LOD) of 0.18&#xa0;µM, significantly surpassing that of FeMoO<sub>4</sub> (0.49&#xa0;µM) and FeMoO<sub>4</sub>/rGO (0.26&#xa0;µM), thereby demonstrating its enhanced sensitivity. Simultaneously, the FeMoO<sub>4</sub>/rGO/PANI electrode delivered a high specific capacitance of 1635&#xa0;F/g at 1&#xa0;A/g and retained 84.1% of its capacitance after extended cycling, underscoring its excellent electrochemical stability. Furthermore the FeMoO<sub>4</sub>/rGO/PANI//Act-C asymmetric supercapacitor displayed a notable specific capacitance of 295&#xa0;F/g. The Ragone plot shows that the device achieves a high energy density of 110&#xa0;Wh/kg at 1000&#xa0;W/kg and retains 80&#xa0;W/kg even at 8300&#xa0;W/kg, demonstrating good energy–power balance and rate capability.Such outstanding electrochemical characteristics indicate its strong suitability for advanced hybrid energy storage devices and multifunctional sensing systems.</p>

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Multifunctional 3D FeMoO4/rGO/PANI nanocomposites: a dual-platform for uric acid detection and advanced supercapacitor performance

  • 期刊论文

  • 发表日期：

    2026年3月21日

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  • Snudia Aslam Rana,
  • Riaz Ahmad,
  • Fozia Shaheen,
  • Muhammad Hammad Aziz,
  • Abdullah Almohammedi,
  • Awatif Alshamari,
  • Aiyeshah Alhodaib

摘要

Rationally designed multifunctional nanocomposites are emerging as key solutions for advancing both high-performance supercapacitors and electrochemical biosensors. In this study, a novel ternary FeMoO4/rGO/PANI nanocomposite was synthesized via a hydrothermal method and evaluated for its dual applicability in electrochemical energy storage and uric acid detection. The modified glassy carbon electrode (GCE) exhibited a strong electrochemical response to varying uric acid concentrations in phosphate buffer solution, as evidenced by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The composite exhibited an outstanding limit of detection (LOD) of 0.18 µM, significantly surpassing that of FeMoO4 (0.49 µM) and FeMoO4/rGO (0.26 µM), thereby demonstrating its enhanced sensitivity. Simultaneously, the FeMoO4/rGO/PANI electrode delivered a high specific capacitance of 1635 F/g at 1 A/g and retained 84.1% of its capacitance after extended cycling, underscoring its excellent electrochemical stability. Furthermore the FeMoO4/rGO/PANI//Act-C asymmetric supercapacitor displayed a notable specific capacitance of 295 F/g. The Ragone plot shows that the device achieves a high energy density of 110 Wh/kg at 1000 W/kg and retains 80 W/kg even at 8300 W/kg, demonstrating good energy–power balance and rate capability.Such outstanding electrochemical characteristics indicate its strong suitability for advanced hybrid energy storage devices and multifunctional sensing systems.