In this present study, we report tuning the catalytic activity in heterogeneous copper oxide (CuO) material as an efficient catalyst in 1.0 M KOH for the oxygen evolution reaction (OER) with low catalyst loading. The CuO materials were facilely synthesized by a simple molten salt method at a high temperature and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) surface area analysis. The catalytic water oxidation activity is affected by many factors, such as the catalyst morphologies, electronic double-layer capacitance, and the conductivity. Under optimal conditions, the CuO material prepared at 900 °C showed the nanosheets structure with more exposed catalytic active sites and demonstrated high catalytic performance for OER with a low overpotential of only 420 mV to achieve 10 mA/cm² and 520 mV to achieve 40 mA/cm², respectively. Furthermore, when CuO nanosheets are mixed with multi-walled carbon nanotubes (MWCNTs), the catalyst loading can be greatly decreased from 0.7 mg/cm² to 0.14 mg/cm² and the overpotential for 40 mA/cm² is also lowered to 470 mV.

在本研究中，我们报告了在1.0 M KOH中以低催化剂负载量对氧分解反应（OER）中作为有效催化剂的非均相氧化铜（CuO）材料的催化活性进行调节的情况。通过简单的熔融盐方法在高温下容易地合成CuO材料，并通过X射线衍射（XRD），扫描电子显微镜（SEM）和Brunauer-Emmett-Teller（BET）表面积分析对其进行表征。催化水的氧化活性受许多因素的影响，例如催化剂的形态，电子双层电容和电导率。在最佳条件下，在900°C下制备的CuO材料显示出具有更多暴露的催化活性位点的纳米片结构，并显示出对OER的高催化性能，只有420 mV的低超电势才能达到10 mA / cm²和520 mV分别达到40 mA / cm ²。此外，当将CuO纳米片与多壁碳纳米管（MWCNT）混合时，催化剂的负载量可从0.7 mg / cm ²大大降低至0.14 mg / cm ^2，并且40 mA / cm ^2的过电势也降低至470毫伏