In this study, CoO_x nanoparticles decorated CuBi₂O₄ submicron-sized square columns (microCuBi₂O₄|CoO_x) modified electrodes were fabricated and their electrocatalytic properties were investigated. microCuBi₂O₄, for the first time, was directly grown onto the electrode substrate using chemical bath deposition (CBD) at room temperature, whereas microCuBi₂O₄|CoO_x was prepared by subjecting microCuBi₂O₄ to additional CBD process and subsequent electrochemical treatment. It was found that the crystalinity of microCuBi₂O₄ and the amount of CoO_x play a decisive role in the overall electrocatalytic activity of microCuBi₂O₄|CoO_x. In addition, the redox couples of the active species, responsible for the electrocatalytic glucose oxidation, in microCuBi₂O₄ and CoO_x overlaps, and these active species exert a synergetic electrocatalytic effect in enhancing the overall electrocatalytic activity, in terms of overpotential and catalytic current, of microCuBi₂O₄|CoO_x towards glucose oxidation. Under optimal conditions, the developed microCuBi₂O₄|CoO_x exhibits a promising sensing characteristics for glucose detection, including a high sensitivity of 383.0 ± 32.3 µA/cm²/mM, a low limit of detection of 0.8 µM, a wide linear range upto 8.0 mM, a fast response time (t₉₅) of < 10 s, and high selectivity against some common interfering species in blood sample.

在这项研究中，CoO _x纳米粒子修饰了CuBi ₂ O ₄亚微米级方柱（micro CuBi ₂ O ₄ | CoO _x）修饰的电极，并研究了它们的电催化性能。微CUBI ₂ ø ₄，在第一次，直接生长到在室温下使用化学浴沉积（CBD）的电极基板，而微CUBI ₂ ö ₄ |的CoO _X是通过对制备的微CUBI ₂ ö ₄进行额外的CBD工艺和随后的电化学处理。发现微CuBi ₂ O ₄的结晶度和CoO _x的量在微CuBi ₂ O ₄ | CoO _x的总体电催化活性中起决定性作用。此外，在微型CuBi ₂ O ₄和CoO _x中，负责电催化葡萄糖氧化的活性物质的氧化还原对这些活性物质在超电势和催化电流方面增强了微观CuBi ₂ O ₄ | CoO _x对葡萄糖氧化的整体电催化活性，从而发挥了协同电催化作用。在最佳条件下，开发的微量CuBi ₂ O ₄ | CoO _x具有良好的葡萄糖检测传感特性，包括383.0±32.3 µA / cm ² / mM的高灵敏度，0.8 µM的低检测限，宽线性范围高达8.0 mM，响应时间短（t ₉₅）的时间小于10 s，并且对血液样本中的一些常见干扰物种具有较高的选择性。