Nanostructured multi-dimensional carbon materials feature in a myriad of energy-based applications ranging from electrocatalysts to supercapacitors and sensors to batteries. This is primarily because the environment-friendly, cost-effective, and well-conducting carbon-based materials possess excellent characteristics towards efficient electrochemical energy conversion and storage. Studies suggest that the electrochemistry of carbon can be significantly altered (or enhanced) by fine-tuning its physical structure and through the incorporation of active surface functional groups and electroactive metal oxides. Herein, the interesting electrochemistry of 2D reduced graphene oxide (a non-stoichiometric carbon, oxygen-based layered structure) and CeO2-x quantum dot (QD) decorated ZIF-derived nitrogen-doped 3D hollow, porous carbon structure towards electrochemical energy storage is discussed. The electrochemical reduction of graphene oxide to graphene slowly changes the surface functionalities causing a gradual enhancement of the specific capacitance (a measure of the electrochemical charge storage). At the same time, the uniform decoration of fine-tuned CeO2-x QDs quite interestingly improves the charge storage properties of the bare porous hollow 3D carbon substrate by 3 times. The systematic investigation on these two different forms of exotic 2D/3D carbon nanostructures offers significant insight to their fundamental electrochemistry and along with providing novel strategies to enhance their energy storage properties.
1. T. Kar, S. Godavarthi, S. K. K. Pasha, K. Deshmukh, L. M.-Gómez, and M. K. Kesarla, Layered materials and their heterojunctions for supercapacitor applications: A review, Critical Reviews in Solid State and Material Science, 2021, 1–32.
2. T. Kar, R. Devivaraprasad, R. K. Singh, B. Bera, and M. Neergat, Reduction of graphene oxide – A comprehensive electrochemical investigation in alkaline and acidic electrolytes, RSC Advances, 4, 57781–57790, 2014.
3. T. Kar, M. Casales-Díaz, J. J. Ramos-Hernández, O. Sotelo-Mazón, J. Henao, S. V. Rodríguez, S. Godavarthi, S. Liu, Y. Yamauchi, and M. K. Kesarla, CeO2−x quantum dots decorated nitrogen-doped hollow porous carbon for supercapacitors, Journal of Colloid and Interface Science, 2022. DOI: 10.1016/j.jcis.2022.04.114
Transmisión vía Youtube en: bit.ly/YouTube_ICF
Institución: Dr. Tathagata Kar
Fecha y hora: Este evento terminó el Miércoles, 04 de Mayo de 2022