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CuMn2O4 Spinel Nanoflakes for Amperometric Detection of Hydrogen Peroxide
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2021-07-01 , DOI: 10.1021/acsanm.1c00898 Yuan Gao 1 , Bo Li 1 , Zhuyan Zhang 2 , Xianfa Zhang 1 , Zhaopeng Deng 1 , Lihua Huo 1 , Shan Gao 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2021-07-01 , DOI: 10.1021/acsanm.1c00898 Yuan Gao 1 , Bo Li 1 , Zhuyan Zhang 2 , Xianfa Zhang 1 , Zhaopeng Deng 1 , Lihua Huo 1 , Shan Gao 1
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The rapid and accurate detection of hydrogen peroxide (H2O2) has recently been a fascinating research topic in electrochemical sensing. Herein, spinel CuMn2O4 nanoflakes were synthesized through coprecipitation and pyrolysis methods and then drop-coated onto the surface of a bare glassy carbon electrode (GCE), successfully generating an enzymatic-free electrochemical sensor (CuMn2O4/GCE) for good amperometric detection ability of H2O2. In comparison with the reported spinel AB2O4-based electrocatalysts in a phosphate buffer solution, the CuMn2O4/GCE sensor exhibits a high sensitivity of 3.420 A M–1 cm–2 and a low detection limit of 12 nM. This excellent sensing performance is mainly derived from the inherent porous structure and the large electrochemical active area of spinel CuMn2O4 nanoflakes, as well as the synergistic effect between Cu and Mn that facilitates electron transfer and increases active sites. Especially, the high contents of Cu+ and Mn3+ ions in the nanocatalyst are useful for promoting the capture and reduction of trace H2O2. In addition, the CuMn2O4/GCE sensor presents a satisfactory recovery in monitoring H2O2 derived from rat serum, commercial milk, and disinfectors, indicating its potential applications in related environmental, food, and biological fields.
中文翻译：
CuMn2O4 尖晶石纳米薄片用于过氧化氢的电流检测
过氧化氢 (H 2 O 2 )的快速准确检测最近已成为电化学传感中一个引人入胜的研究课题。在此，通过共沉淀和热解方法合成尖晶石 CuMn 2 O 4纳米薄片，然后滴涂到裸玻碳电极（GCE）的表面，成功地生成了无酶电化学传感器（CuMn 2 O 4 /GCE），用于对H 2 O 2具有良好的电流检测能力。与报道的磷酸盐缓冲溶液中基于尖晶石 AB 2 O 4的电催化剂相比，CuMn 2 O4 /GCE 传感器具有 3.420 AM –1 cm –2的高灵敏度和 12 nM 的低检测限。这种优异的传感性能主要来源于尖晶石CuMn 2 O 4纳米薄片固有的多孔结构和大的电化学活性面积，以及Cu和Mn之间促进电子转移和增加活性位点的协同作用。特别是，纳米催化剂中高含量的Cu +和Mn 3+离子有助于促进痕量H 2 O 2的捕获和还原。此外，CuMn 2 O 4/GCE 传感器在监测来自大鼠血清、商业牛奶和消毒剂的H 2 O 2 方面表现出令人满意的恢复，表明其在相关环境、食品和生物领域的潜在应用。
更新日期：2021-07-23
中文翻译：
CuMn2O4 尖晶石纳米薄片用于过氧化氢的电流检测
过氧化氢 (H 2 O 2 )的快速准确检测最近已成为电化学传感中一个引人入胜的研究课题。在此，通过共沉淀和热解方法合成尖晶石 CuMn 2 O 4纳米薄片，然后滴涂到裸玻碳电极（GCE）的表面，成功地生成了无酶电化学传感器（CuMn 2 O 4 /GCE），用于对H 2 O 2具有良好的电流检测能力。与报道的磷酸盐缓冲溶液中基于尖晶石 AB 2 O 4的电催化剂相比，CuMn 2 O4 /GCE 传感器具有 3.420 AM –1 cm –2的高灵敏度和 12 nM 的低检测限。这种优异的传感性能主要来源于尖晶石CuMn 2 O 4纳米薄片固有的多孔结构和大的电化学活性面积，以及Cu和Mn之间促进电子转移和增加活性位点的协同作用。特别是，纳米催化剂中高含量的Cu +和Mn 3+离子有助于促进痕量H 2 O 2的捕获和还原。此外，CuMn 2 O 4/GCE 传感器在监测来自大鼠血清、商业牛奶和消毒剂的H 2 O 2 方面表现出令人满意的恢复，表明其在相关环境、食品和生物领域的潜在应用。
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