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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Synthesis of a Binary Mn-Co Oxides Decorated Graphene Nanocomposites for Application in Nonenzymatic H2O2 Sensing
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Electrochemical Synthesis of a Binary Mn-Co Oxides Decorated Graphene Nanocomposites for Application in Nonenzymatic H2O2 Sensing

机译：电化学合成二元锰钴氧化物修饰的石墨烯纳米复合材料在非酶促H 2 O 2 传感中的应用

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In this work, binary metallic oxides of MnO2-Co3O4 nanocomposite was electrodeposited on graphene oxide (GO) modified electrode by a facile and one-step electrochemical method. The resultant MnO2- Co3O4/graphene (MnO2-Co3O4/GP) electrode was characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) to study its morphology and element composition. The as-prepared MnO2-Co3O4/GP modified electrode was employed in fabricating a nonenzymatic H2O2 electrochemical sensor. The cyclic voltammetry (CV) and amperometric experiments demonstrated that the MnO2-Co3O4/GP composites exhibited superior electrocatalytic activities toward oxidation of H2O2 to the monometallic oxide decorated graphene materials (MnO2/GP - and Co3O4/GP). The developed nonenzymatic H2O2 sensor showed a high sensitivity of 53.65??A mM 1 cm-2, a wide linear range of 5??M-1.2 mM, and a detection limit of 0.8??M (S/N = 3). In addition, good selectivity, high detection accuracy and acceptable stability were also obtained for the present sensor. Therefore, this work will open an avenue to construct high-performance electrode materials and expand their applications in various fields such as catalysis and biosensor.
机译：在这项工作中，MnO2-Co3O4纳米复合材料的二元金属氧化物通过一种简便的一步法电化学沉积在氧化石墨烯（GO）修饰的电极上。通过扫描电子显微镜（SEM）和能量色散X射线光谱（EDX）对所得的MnO2-Co3O4 /石墨烯（MnO2-Co3O4 / GP）电极进行表征，以研究其形态和元素组成。制备的MnO2-Co3O4 / GP修饰电极用于制备非酶化H2O2电化学传感器。循环伏安法（CV）和安培实验表明，MnO2-Co3O4 / GP复合材料对H2O2氧化成装饰有单金属氧化物的石墨烯材料（MnO2 / GP-和Co3O4 / GP）表现出优异的电催化活性。研制出的非酶H2O2传感器具有53.65？A mM 1 cm-2的高灵敏度，5？M-1.2 mM的宽线性范围和0.8？M的检测限（S / N = 3）。另外，对于本发明的传感器还获得了良好的选择性，高检测精度和可接受的稳定性。因此，这项工作将为构建高性能电极材料开辟道路，并扩大其在催化和生物传感器等各个领域的应用。

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