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<p>Hydrazine is widely used in various industries as a strong reducing and oxygen-scavenging agent; however, its high toxicity and complete miscibility in water pose serious environmental and health risks, necessitating its accurate and sensitive detection. In this work, the electrochemical detection and quantification of hydrazine in 0.1&#xa0;M PBS (pH 7.0) were performed using copper-cobalt oxide on N, S–doped hollow carbon sphere nanocomposite (CuCo₂O₄/NSCS) electrocatalyst prepared via hard-template method. The crystallographic nature, morphology, elemental distribution, oxidation states and chemical bonding characteristics of the synthesized CuCo₂O₄/NSCS material were examined using XRD, Raman, TGA, XPS, FESEM and HRTEM techniques. Cyclic voltammetry (CV) was employed to evaluate the hydrazine oxidation behavior. The CuCo₂O₄/NSCS nanocomposite exhibited hydrazine oxidation peak at 0.32&#xa0;V (vs. SCE), and the oxidation process was found to be diffusion-controlled. Differential pulse voltammetry (DPV) was further used for quantitative analysis, demonstrating electrocatalytic performance of CuCo₂O₄/NSCS-modified GCE for hydrazine detection with a linear detection range from 50&#xa0;µM to 6000&#xa0;µM and limit of detection (LOD) of 19.57&#xa0;µM. The CuCo₂O₄/NSCS-modified GCE shows strong potential for practical applications, including the analysis of hydrazine in real water samples.</p>

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In-situ grown copper-cobalt oxide on N, S-doped hollow carbon sphere nanocomposite for enhanced electrochemical hydrazine detection

  • 期刊论文

  • 发表日期：

    2026年6月25日

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  • Karuppaiya Ranjithkumar,
  • Hari Prasaad Somasundaram,
  • Paulraj Sathiya,
  • Rangasamy Thangamuthu,
  • Sakkarapalayam Murugesan Senthil Kumar

摘要

Hydrazine is widely used in various industries as a strong reducing and oxygen-scavenging agent; however, its high toxicity and complete miscibility in water pose serious environmental and health risks, necessitating its accurate and sensitive detection. In this work, the electrochemical detection and quantification of hydrazine in 0.1 M PBS (pH 7.0) were performed using copper-cobalt oxide on N, S–doped hollow carbon sphere nanocomposite (CuCo₂O₄/NSCS) electrocatalyst prepared via hard-template method. The crystallographic nature, morphology, elemental distribution, oxidation states and chemical bonding characteristics of the synthesized CuCo₂O₄/NSCS material were examined using XRD, Raman, TGA, XPS, FESEM and HRTEM techniques. Cyclic voltammetry (CV) was employed to evaluate the hydrazine oxidation behavior. The CuCo₂O₄/NSCS nanocomposite exhibited hydrazine oxidation peak at 0.32 V (vs. SCE), and the oxidation process was found to be diffusion-controlled. Differential pulse voltammetry (DPV) was further used for quantitative analysis, demonstrating electrocatalytic performance of CuCo₂O₄/NSCS-modified GCE for hydrazine detection with a linear detection range from 50 µM to 6000 µM and limit of detection (LOD) of 19.57 µM. The CuCo₂O₄/NSCS-modified GCE shows strong potential for practical applications, including the analysis of hydrazine in real water samples.