“Enhancing electrochemical performance of Fe@Ir/GQDs electrodes with MoS₂ for advanced energy storage and hydrogen evolution Reaction”

Abstract

Metal-organic frameworks (MOFs) have unique properties that make them important in energy storage systems. The layered structure, edge locations, wide surface area, and closeness impact of MoS2/GQDs nanostructures enhance their ability for energy storage. We are effectively utilizing the hydrothermal technique to synthesize Fe@Ir-MOF/MoS2/GQDs, a new composite electrode material for supercapattery energy storage devices. Using a three-electrode setup, we are assessing the electrochemical performance of Fe@Ir-MOF, Fe@Ir-MOF/MoS2, and Fe@Ir-MOF/MoS2/GQDs. Fe@Ir-MOF/MoS2/GQDs is showing exceptional electrochemical qualities, demonstrating an excellent specific capacity of 1104C/g in an electrolyte solution containing 1 M KOH. The Ir@Fe-MOF/MoS2/GQDs is exhibiting energy and power density of around 53 W h kg−1 and 2652 W kg−1, respectively. A Coulombic efficiency of 92.23 % and 96.14 % of capacity are being maintained by the Fe@Ir-MOF/MoS2/GQDs//AC material after 5000 cycles of alternative GCD measurements. The results of this work are showing that supercapattery applications can benefit from the new electrode material Fe@Ir-MOF/MoS2/GQDs. The HER is having a lower potential barrier of 32.12 mV dec-1 with a 130 mV overpotential at −10 mA cm−2 due to the Fe@Ir-MOF/MoS2/GQDs composite. This work is providing a way to develop effective bimetallic MOFs nanocomposite materials for use in biomedical and future energy storage systems.