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<p>A highly sensitive nano-flakes like electrochemical glucose sensor was fabricated via a highly surface-roughened Ni(OH)<sub>2</sub>/Ni electrode decorated with Co(OH)<sub>2</sub> (NF Co(OH)<sub>2</sub>-Ni(OH)<sub>2</sub>/Ni electrode). The composite electrode is binder-free, which was fabricated by immersing a commercial Ni disk electrode in 1&#xa0;M HNO<sub>3</sub> and 0.1&#xa0;M NaOH solution at room temperature and subsequent electrodeposition of 0.1&#xa0;M Co(NO<sub>3</sub>)<sub>2</sub> precursor in aqueous solution. The composite electrode has a large surface area, which enhances the electro-oxidation of glucose and the performance in sensing. The catalytic activity of NF Co(OH)<sub>2</sub>-Ni(OH)<sub>2</sub>/Ni towards electrooxidation of glucose was examined. It shows high sensitivity (1244 µA·mM<sup>−1</sup>·cm<sup>−2</sup>), low detection limit (0.08 µM), wide linear range (2 µM ~ 8.11 mM). Moreover, the sensor exhibited good selectivity, repeatability and stability, and accurate analysis of glucose in glucose injection.</p>

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Hierarchical Co(OH)2-Ni(OH)2/Ni nano-flakes modified electrode with highly rough surface for advanced determination of glucose

  • 期刊论文

  • 发表日期：

    2025年9月29日

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  • Zhilin Chen,
  • Yuxiang Huang,
  • Kuo Liu,
  • Guichun Mo,
  • Lihong Liang,
  • Yuanjiao Pei,
  • Liqin Qin

摘要

A highly sensitive nano-flakes like electrochemical glucose sensor was fabricated via a highly surface-roughened Ni(OH)2/Ni electrode decorated with Co(OH)2 (NF Co(OH)2-Ni(OH)2/Ni electrode). The composite electrode is binder-free, which was fabricated by immersing a commercial Ni disk electrode in 1 M HNO3 and 0.1 M NaOH solution at room temperature and subsequent electrodeposition of 0.1 M Co(NO3)2 precursor in aqueous solution. The composite electrode has a large surface area, which enhances the electro-oxidation of glucose and the performance in sensing. The catalytic activity of NF Co(OH)2-Ni(OH)2/Ni towards electrooxidation of glucose was examined. It shows high sensitivity (1244 µA·mM−1·cm−2), low detection limit (0.08 µM), wide linear range (2 µM ~ 8.11 mM). Moreover, the sensor exhibited good selectivity, repeatability and stability, and accurate analysis of glucose in glucose injection.