| dc.description.abstract | Recently, the potential of electrolysis to produce green hydrogen plays an important role in the sustainable energy transition. Therefore, electrocatalysts are needed to improve the efficiency of the reaction. However, the well-known effective materials for OER are Ir and Ru, which are known to be expensive, rare, and difficult to manufacture. Herein, we develop metal organic framework electrocatalyst materials using transition metals Ni and Co, which can overcome the disadvantages of precious metals. This research optimizes graphene oxide by a simple sonication method to improve the material. The NiCo/MOF-GO morphology from FESEM observation shows that the addition of GO to the NiCo/MOF material creates the material have a large surface area with a dodecahedron shape that is enveloped. Still, there is a clump of GO layer covering the MOF surface which reduces the conductivity value. This study shows the efficient electrochemical performance of OER as GO increases. Specifically, NiCo/MOF-GO 4.03 wt% material shows optimal electrocatalytic activity, including an overpotential of 294 mA/cm2 for a current density of 10 mA/cm2, a tafel slope of 35.9 mV/dec, an electrochemical active surface area of 39.4 mF/cm2, and a charge transfer resistance of 19.29 Ω. In conclusion, transition metals on MOFs with GO present have the potential to be efficient energy conversion electrocatalysts. | en_US |
