In this report, a novel flower like-structured CuFe oxides was directly grown on graphene nanosheets supported nickel foam substrates (CuFe-O/GR/NF) via a hydrothermal method followed by an additionally pyrolysis process. The different morphologies consistent with varied synthesis conditions, along with their catalytic activity were discussed. The CuFe-O/GR/NF material was successfully applied as an electrocatalyst for sensing glucose with a wide linear concentration range of 0.0079 μM - 21.504 μM, sensitivity of 0.368 mA μM^-1 cm^-2, and limit of detection of 0.0079 μM. Impressively, the CuFe-O/GR/NF showed much higher electrocatalytic activity, lower overpotential and greater stability as compared to that of mono Cu-O/GR/NF or Fe-O/GR/NF synthesized by the same method. The higher electrocatalytic activity was due to the high electron conductivity, large surface area of CuFe-O/GR/NF and the fast ion/electron transport in the electrode and at the electrolyte–electrode interface. This is important for further development of high performance electrocatalysts for sensor application.

在此报告中，一种新颖的花状结构CuFe氧化物通过水热法直接在石墨烯纳米片支撑的镍泡沫基底（CuFe-O / GR / NF）上直接生长，然后再进行热解工艺。讨论了与各种合成条件一致的不同形态，以及它们的催化活性。CuFe-O / GR / NF材料已成功地用作检测葡萄糖的电催化剂，线性浓度范围为0.0079μM-21.504μM，灵敏度为0.368 mAμM ^-1 cm ^-2，检测限为0.0079μM。令人印象深刻的是，与通过相同方法合成的单Cu-O / GR / NF或Fe-O / GR / NF相比，CuFe-O / GR / NF表现出更高的电催化活性，更低的超电势和更高的稳定性。较高的电催化活性是由于高的电子电导率，较大的CuFe-O / GR / NF表面积以及电极和电解质-电极界面的快速离子/电子传输。这对于进一步开发用于传感器应用的高性能电催化剂很重要。