Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan.
Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Kanakapura, Bangalore, 562112, India.
Mikrochim Acta. 2022 Aug 4;189(9):315. doi: 10.1007/s00604-022-05416-0.
The synthesis of manganese cobaltate (MnCoO) with the hybrid three-dimensional architecture has been developed as an electrocatalyst for the electrochemical sensing of paraoxon-ethyl (PEL). The detailed physicochemical and structural characterization of MnCoO is meticulously examined. The MnCoO-modified screen-printed carbon electrode (SPCE) exhibits good electrocatalytic activity for the reduction of PEL compared with the bare SPCE due to numerous unique properties. By profiting from these advantages, the proposed MnCoO/SPCE shows superior sensing performance toward the determination of PEL, including low cathodic peak potential (- 0.64 V), wide detection range (0.015-435 µM), low limit of detection (0.002 µM), high detection sensitivity (2.30 µA µM cm), excellent selectivity, and good reproducibility. Notably, the electrochemical performance of the MnCoO-based electrocatalyst is superior to those previously reported in the literatures. The practical application of the MnCoO/SPCE is effectively assessed in the analysis of food and water samples with satisfied recoveries of 96.00-99.35%. The superior performance of the proposed MnCoO electrocatalyst holds considerable potential for future development of electrochemical sensing platforms.
锰钴酸盐（MnCoO）的杂化三维结构的合成已被开发为用于电化学感测乙基对氧磷（PEL）的电催化剂。详细地检查了 MnCoO 的物理化学和结构特性。与裸 SPCE 相比，MnCoO 修饰的丝网印刷碳电极（SPCE）由于具有许多独特的性质，对 PEL 的还原表现出良好的电催化活性。通过利用这些优势，所提出的 MnCoO/SPCE 对 PEL 的测定表现出优异的传感性能，包括低阴极峰电位（-0.64 V）、宽检测范围（0.015-435 μM）、低检测限（0.002 μM）、高检测灵敏度（2.30 μA μM cm）、出色的选择性和良好的重现性。值得注意的是，基于 MnCoO 的电催化剂的电化学性能优于文献中先前报道的那些。MnCoO/SPCE 的实际应用在食品和水样的分析中得到了有效评估，回收率为 96.00-99.35%。所提出的 MnCoO 电催化剂的卓越性能为电化学传感平台的未来发展提供了巨大的潜力。
