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With unique 4f electronic shells, rare earth metal-based catalysts have been attracting tremendous attention in electrocatalysis, including oxygen reduction reaction (ORR). In particular, atomically dispersed Ce/CeO2-based catalysts have been explored extensively due to several unique features. This review article provides a comprehensive understan...
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... Compared to transition metal oxides, which possess more delocalized electronic states, CeO₂'s charge carrier mobility is significantly constrained. Furthermore, grain boundaries and defect structures within synthesized CeO₂ contribute to charge carrier scattering, further reducing conductivity [31][32][33]. ...
The growing global demand for efficient and sustainable energy storage systems has led to extensive exploration of nanostructured materials with enhanced electrochemical properties. In this study, cerium oxide (CeO₂) and copper oxide (CuO) nanocomposites were synthesized using a rapid, energy-efficient microwave-assisted method to improve energy storage capabilities. The integration of CeO₂ and CuO achieved through this technique demonstrated remarkable electrochemical performance compared to conventional approaches. Comprehensive characterization confirmed the structural and morphological features of the synthesized nanocomposites. The study reported a maximum specific capacity of 916 C g⁻¹ for the CeO₂-CuO nanocomposite, highlighting its excellent rate capability. Furthermore, the fabricated supercapacitor device exhibited an energy density of 9.86 Wh kg⁻¹, a power density of 500 W kg⁻¹, and a capacitance retention of 86% after 10,000 cycles. With potential applications as a power source for wearable electronics, this research underscores the importance of advanced synthesis techniques that not only reduce synthesis time but also enhance scalability, paving the way for the development of high-performance nanomaterials for energy storage applications.
