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<p>Accurate and early detection of ascorbic acid and uric acid is essential for effective clinical diagnosis and management of associated metabolic disorders. In this study, a two-dimensional petal-like tungsten diselenide nanostructure was synthesized via the hydrothermal method and employed to modify a glassy carbon electrode (GCE), forming an efficient electrochemical sensing platform for the simultaneous detection of ascorbic acid and uric acid. The synthesized materials were characterized using X-ray diffraction, scanning electron microscopy, and Raman spectroscopy to confirm their phase, morphology, and structural properties. Electrochemical performance of the GCE modified WSe<sub>2</sub> electrode (WSe<sub>2</sub>-PS) was evaluated using cyclic voltammetry and differential pulse voltammetry. The WSe<sub>2</sub> petal-structured electrode exhibited enhanced sensing performance, attributed to the increased catalytically active sites. This electrochemical sensor demonstrated excellent analytical performance, displaying a broad linear detection range of 14–2725&#xa0;µM for ascorbic acid and 6–181&#xa0;µM for uric acid, with low limit of detection calculated to be 3.74&#xa0;µM and 0.54&#xa0;µM, respectively. In addition, in the presence of 1&#xa0;M KOH to demonstrate the alkaline oxygen evolution application, WSe<sub>2</sub>-PS exhibited an overpotential of 310&#xa0;mV to attain 10&#xa0;mA/cm<sup>2</sup>, with a Tafel slope and electrochemical active surface area of 66&#xa0;mV/dec and 80 cm<sup>2</sup>, respectively. This study highlights the potential of WSe<sub>2</sub> as a promising electrocatalyst for non-enzymatic electrochemical sensing applications and alkaline oxygen evolution reaction.</p> Graphical Abstract <p></p>

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Bi-functional WSe2-based electrocatalyst for simultaneous detection of ascorbic/uric acid and alkaline oxygen evolution reaction

  • 期刊论文

  • 发表日期：

    2025年12月4日

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  • Bagana Vanitha,
  • Rashmi Sinha

摘要

Accurate and early detection of ascorbic acid and uric acid is essential for effective clinical diagnosis and management of associated metabolic disorders. In this study, a two-dimensional petal-like tungsten diselenide nanostructure was synthesized via the hydrothermal method and employed to modify a glassy carbon electrode (GCE), forming an efficient electrochemical sensing platform for the simultaneous detection of ascorbic acid and uric acid. The synthesized materials were characterized using X-ray diffraction, scanning electron microscopy, and Raman spectroscopy to confirm their phase, morphology, and structural properties. Electrochemical performance of the GCE modified WSe2 electrode (WSe2-PS) was evaluated using cyclic voltammetry and differential pulse voltammetry. The WSe2 petal-structured electrode exhibited enhanced sensing performance, attributed to the increased catalytically active sites. This electrochemical sensor demonstrated excellent analytical performance, displaying a broad linear detection range of 14–2725 µM for ascorbic acid and 6–181 µM for uric acid, with low limit of detection calculated to be 3.74 µM and 0.54 µM, respectively. In addition, in the presence of 1 M KOH to demonstrate the alkaline oxygen evolution application, WSe2-PS exhibited an overpotential of 310 mV to attain 10 mA/cm2, with a Tafel slope and electrochemical active surface area of 66 mV/dec and 80 cm2, respectively. This study highlights the potential of WSe2 as a promising electrocatalyst for non-enzymatic electrochemical sensing applications and alkaline oxygen evolution reaction.

Graphical Abstract