Abstract
Hydrogen has recognized as a high energy density, efficient, and environmentally clean in a variety of renewable energy sources can be produced by an anion exchange membrane electrolyzer that has several advantages as use of non-precious metal oxide catalysts, high pressure operation, and high efficiency compared with other type electrolyzers. The target of this study is the development of non-precious catalysts with high activity via simple and efficient synthesis method. The prepared OER electrocatalysts were characterized by various physicochemical analyses such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Furthermore, to investigate electrocatalytic properties of prepared catalysts, we carried out electrooxidation activity measurements such as cyclic voltammetry (CV), linear sweep voltammetry (LSV), long-term stability test, and electrochemical impedance spectroscopy (EIS). The synthesized CuCoO4 series catalysts show a different tendency in physicochemical properties and OER activity with synthesis conditions as pH, heat treatment temperature, and drying method. Figure 1
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