Ce–Metal–Organic Framework-Derived CeO2–GO: An Efficient Electrocatalyst for Oxygen Evolution Reaction

The oxygen evolution reaction (OER) is a crucial half-reaction in water splitting. However, this kinetically sluggish owing to the four-electron (4 e−) transfer process. Therefore, development of low-cost, stable, highly efficient, and earth-abundant electrocatalysts for OER desirable. Metal oxides derived from metal–organic frameworks (MOFs) are among most efficient OER. Herein, Ce–MOF-derived CeO2/graphene oxide (GO) composites were successfully prepared using facile method. with 0, 25, 50, 100 mg GO named CeO2, CeO2–GO-1, CeO2–GO-2, CeO2–GO-3, respectively. physicochemical characteristics assessed several analytical techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission (HR-TEM), photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) analysis. TEM results revealed that CeO2 had sheet-like morphology layer was noticeable synthesized CeO2–GO-3 composite. characterization confirmed formation impurity-free CeO2–GO composites. activity stability measured cyclic voltammetry (CV), linear sweep (LSV), chronoamperometry (CA), electrochemical impedance (EIS). electrocatalyst has smaller Tafel slope (176 mV·dec−1) lower overpotential (240 mV) than other electrocatalysts. In addition, it exhibited high up 10 h. inexpensive promising candidate.