Document Type

Article

Publication Date

1-1-2022

Abstract

Green energy production via cost-effective ways is one of the main requirements in current days. Hydrogen as a green fuel source is very attractive for a sustainable future as hydrogen is considered a zero-carbon emission fuel. Hydrogen can be produced via many routes. Among many approaches, hydrogen generation via water splitting is one of the greenest ways to get green fuel. In most cases, hydrogen production via water splitting requires efficient electrocatalysts to reduce the overpotential (extra cost) of this process. Platinum and rareearth-based materials are considered efficient electrocatalysts, however, their high cost is one of the limiting factors. process. In this work, metal oxide framework-based cobalt oxides were synthesized and used as efficient electrocatalysts for water splitting applications. The nanostructured MOF-based cobalt oxides were prepared using a facile method that can be easily adapted for commercial applications. The samples were hoghly porous with a high surface area which acted as active sites for electrocatalytic activities. The materials' properties were tuned by calcining the samples at various temperatures. These materials showed low overpotential in the range of 75 to 137 mV to achieve a current density of 10 mA/cm2 for hydrogen production. Depending on the growth conditions, these materials required an overpotential in the range of 370 to 440 mV for oxygen production. These materials showed stable performance for up to 1,000 cycles of cyclic voltammetric studies suggesting possible commercial applications in fuel cell technology.

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