Abstract:
Inorganic materials hold a special place in the current research domains of energy storage (supercapacitor) and electrochemical conversion of CO2.1,2 Specifically, metal-organic frameworks (MOFs) and coordination polymers (CPs) are structurally suitable for these applications. MOFs and CPs are the inorganic materials that contain metal/metal clusters in the centre which are connected to the ligands to form porous structures. These structures are crucial for intercalation and de-intercalation of the ions during the energy storage process.2,3 Lanthanide ions can have high coordination numbers which is useful to synthesize organized nanoporous Ln-based materials.4,5 Lanthanide-based MOF crystals with 9-coordination bonds have been synthesized by hydrothermal method using 5-nitroisopthalic acid and pyridine-2,6-dicarboxylic acid as ligands. The electrochemical measurements demonstrate that the MOFs are good charge storage materials through faradaic redox reactions. On the other hand, Bi-CP MOF-derived bismuth oxide has been prepared by pyrolysis. All these materials show high capacitance with good cyclic stability. These materials show specific capacity as high as 711 C/g in a three-electrode system at a current density of 1 A/g. Electrodeposition of copper films has also been studied for electrochemical conversion of CO2 to ethanol.
References
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4. Singh, D. L.; Ghosh, T. K.; Mishra, V.; Ramasamy, S.; Sahoo, M. K.; Ranga Rao G., ACS Appl. Nano Mater. 2022, 5, 15237–15249.
5. Singh, D. L.; Mishra, V.; Ghosh, T. K.; Ranga Rao, G., ChemistrySelect 2022, 7, e202202076.