Pick a Wick: A Simple, Ultrafast Combustion Synthesis of Co3O4 Dispersed Carbon for Enhanced Oxygen Evolution Kinetics

Singh, DK and Chakraborty, S and Saha, A and Sampath, S and Eswaramoorthy, M (2018) Pick a Wick: A Simple, Ultrafast Combustion Synthesis of Co3O4 Dispersed Carbon for Enhanced Oxygen Evolution Kinetics. In: ACS Applied Energy Materials, 1 (9). pp. 4448-4452.

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Abstract

Mass transport and charge transfer at an interface play a crucial role in governing the electrochemical performance of a material. Wider meso-/macropores are expected to enhance the reaction kinetics by facilitating the ion transport to and fro from an active interface, thereby continuously regenerating it at accelerated rates. Herein, we report a generic, simple, and ultrafast synthetic method to obtain highly graphitized porous carbon containing well-dispersed Co3O4 nanoparticles (∼1 wt % Co) using cobalt acetate and piperidine precursors. The obtained catalyst (Co3O4@CS) exhibits onset potential and oxygen evolution kinetics similar to that of the state-of-the-art catalyst, RuO2. For oxygen evolution reaction (OER), the synthesized material exhibits excellent cycling performance over 2000 cycles. Such a performance metric can be attributed to the uniform dispersion of active sites (Co3O4) over a low-density, highly interconnected conducting carbon matrix leading to facile mass transport and charge transfer, respectively.

Item Type:	Journal Article
Publication:	ACS Applied Energy Materials
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society.
Keywords:	Carbon carbon composites; Charge transfer; Combustion; Combustion synthesis; Electrocatalysts; Kinetics; Oxygen; Porous materials; Reaction rates; Ruthenium compounds, Carbon composites; Cycling performance; Electrochemical performance; Electron transfer; Oxygen evolution reaction; Performance metrices; Synthesized materials; Uniform dispersions, Cobalt compounds
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	05 Aug 2022 09:40
Last Modified:	05 Aug 2022 09:40
URI:	https://eprints.iisc.ac.in/id/eprint/75368

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