Zn3(PO4)2·4H2O/TiO2 Structure for Superior Oxygen Evolution Reaction and Energy Storage Applications

Abstract

In this study, we present the synthesis and characterization of a high-performance Zn₃(PO₄)₂·4H₂O/TiO₂ nanocomposite, designed as a versatile electrocatalyst for advanced energy storage and conversion applications. The synthesis of the Zn₃(PO₄)₂·4H₂O/TiO₂ nanocomposite was confirmed using various sophisticated analytical techniques such as powder x-ray diffraction, FTIR, UV spectroscopy, FESEM imaging, EDX, and XPS etc. Notably, the nanocomposite demonstrates exceptional performance in the oxygen evolution reaction (OER), with a low overpotential of 250 mV at a current density of 50 mV/cm² and a Tafel slope of 129 mV/dec, indicating superior kinetics. Furthermore, it demonstrates a specific capacitance of 112 F/g at a scan rate of 20 mV/s and remarkable cyclic stability, retaining 91% capacitance over 1000 cycles in supercapacitor applications. Additionally, in a practical application, the nanocomposite successfully powered a red light-emitting diode (LED) for 11 min. The combined effect of Zn₃(PO₄)₂·4H₂O₂ and TiO₂ contributes to its outstanding electrochemical properties. This makes it a promising candidate for sustainable energy solutions, with the potential to enhance the efficiency and durability of energy storage and conversion systems.