Ganesha H, Vandana M, Sapna S, Vijaykumar S P, Shbil Abdullah Ba, Suresh D S, Chapi Sharanappa, Kityakarn Sutasinee, Thongmee Sirikanjana, Devendrappa H
Department of Physics, Faculty of Science, Kasetsart University Bangkok 10900 Thailand.
Department of Physics, Mangalore University Mangalagangothri 574199 India
RSC Adv. 2025 Jun 26;15(27):21898-21913. doi: 10.1039/d5ra03381k. eCollection 2025 Jun 23.
Recently, hydrogen has garnered significant attention as a renewable and environmentally friendly energy source. The majority of industrial hydrogen is produced by turning natural gas into hydrogen. In this case, the development of reliable, economical, and effective catalysts that can produce hydrogen from water with minimum electrical bias is one of the main objectives of large-scale electrolysis. One approach to achieving the practical application of electrocatalysts in the production of hydrogen is to use easily accessible electrocatalyst materials that can facilitate the oxidation of water. In this work, we report the synthesis of an electrocatalyst for the electrochemical detection of the hydroquinone (HQ) analyte molecule in water samples and H production. A polypyrrole nanotube/copper oxide (PNT/CuO) nanocomposite was synthesized the self-assembly of a soft template obtained through chemical polymerization and a one-pot hydrothermal method. The prepared material was characterized using various techniques to examine its crystal phase, functional groups, and surface morphology. An electrochemical study was conducted using a PNT glassy carbon electrode (GCE) and PNT/CuO GCE, and CV curves showed a large surface area with good oxidation behaviour towards the HQ analyte. The DPV analysis of the HQ analyte exhibited an LOD of 0.36 μM and a high sensitivity of 9.33 μA μM cm, with a linear range of 5-60 μM. The real sample analysis of the HQ analyte in a water sample showed recovery in the range of 97.45-102.61% with an RSD of 1%. These findings suggest that the PNT/CuO GCE sensor is a strong option for detecting the HQ analyte in real samples. Furthermore, the PNT/CuO GCE exhibited exceptional electrocatalytic activity for the HER ( = 330 mV and Tafel slope = 139 mV dec), showing that the PNT/CuO GCE exhibits high activity as an electrocatalyst for H generation.
近年来，氢气作为一种可再生且环保的能源受到了广泛关注。大多数工业氢气是通过将天然气转化为氢气来生产的。在这种情况下，开发可靠、经济且有效的催化剂，能够在最小电偏压下从水中制氢，是大规模电解的主要目标之一。实现电催化剂在制氢中实际应用的一种方法是使用易于获取的电催化剂材料，以促进水的氧化。在这项工作中，我们报道了一种用于电化学检测水样中对苯二酚（HQ）分析物分子及制氢的电催化剂的合成。通过化学聚合和一锅水热法获得的软模板自组装合成了聚吡咯纳米管/氧化铜（PNT/CuO）纳米复合材料。使用各种技术对制备的材料进行表征，以检查其晶相、官能团和表面形态。使用PNT玻碳电极（GCE）和PNT/CuO GCE进行了电化学研究，循环伏安曲线显示其具有大表面积，对HQ分析物具有良好的氧化行为。HQ分析物的差分脉冲伏安分析显示检测限为0.36 μM，灵敏度高达9.33 μA μM cm，线性范围为5 - 60 μM。对水样中HQ分析物的实际样品分析显示回收率在97.45 - 102.61%范围内，相对标准偏差为1%。这些结果表明，PNT/CuO GCE传感器是检测实际样品中HQ分析物的有力选择。此外，PNT/CuO GCE对析氢反应表现出优异的电催化活性（过电位 = 330 mV，塔菲尔斜率 = 139 mV dec），表明PNT/CuO GCE作为制氢电催化剂具有高活性。
