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In order to advance sustainable energy technologies like fuel cells and metal-air batteries, it is crucial to use an electrocatalyst that is very efficient for the process of oxygen evolution. The production of Co3O4 nanostructures led to the creation of a multiporous nanostructure. The research used an approach that utilised a simple, cost-effective, and low-temperature synthesis procedure. The catalytic activity of Co3O4 nanostructures, which have a high degree of porosity and include mesoporous nanostructures, was shown to be substantial. The catalyst has the ability to enhance the highly reactive oxygen reactions at the anode, hence increasing the combined effect of charge transfer at the interface and the porous structure of Co3O4 nanostructures. The results of this study demonstrate that Co3O4 nanostructures exhibit a significant overpotential value of 321 mV at 10 mA/cm2, a Tafel slope of 72 mV Dec−1, and excellent stability when used as electrocatalysts for the oxygen evolution process (OER) in real-world situations. [ABSTRACT FROM AUTHOR]

The development of renewable energy technologies, such as fuel cells and metal-air batteries, relies heavily on the availability of highly efficient electrocatalysts for the oxygen evolution reaction (OER). In this study, a mesoporous Fe3O4-ZnO nanocomposites was synthesized using a simple and economically viable approach at a relatively low temperature. The observed catalytic activity of the prepared Fe3O4-ZnO nanocomposites mesoporous nanostructure was found to be remarkable. Additionally, the nanostructure exhibited a high tolerance to methanol and demonstrated durability towards oxygen evolution reaction (OER) in alkaline media. In the course of the experiment, it was observed that the catalyst exhibited noteworthy activity in the oxygen evolution reaction (OER) when compared to the commercially available RuO2 catalyst. This was evident through a more negative onset potential and higher current. The catalyst's notable capacity for high oxygen reaction activity may potentially enhance the synergistic effect resulting from the combination of defect sites and the porous structure of Fe3O4-ZnO nanocomposites. The findings of this study indicate that the Fe3O4-ZnO nanocomposites exhibit promising attributes as an electrocatalyst with overpotential and Tafel slope value of 350 mV and 62 mVdec−1 for the oxygen evolution reaction (OER) in real-world scenarios. [ABSTRACT FROM AUTHOR]

Fuel cells and metal‐air batteries are examples of renewable energy technologies that depend on having highly effective electrocatalysts for the oxygen evolution reaction (OER). In this study, a mesoporous nanostructure composed of Fe3O4‐Carbon nanocomposites was synthesised using a simple and economically viable approach at a relatively low temperature. The observed catalytic activity of the prepared defected Fe3O4‐Carbon nanocomposites mesoporous nanostructure was found to be remarkable. Additionally, the nanostructure exhibited a high tolerance to methanol and demonstrated durability towards the oxygen evolution reaction (OER) in alkaline media. In the course of the experiment, it was observed that the catalyst exhibited noteworthy activity in the Oxygen Evolution Reaction (OER) when compared to the commercially available RuO2 catalyst. This was evident through a more overpotential value of 325 mV at current density of 10 mA/cm2. The catalyst's notable capacity for high oxygen reaction activity may potentially enhance the synergistic effect resulting from the combination of defect sites and the porous structure of Fe3O4‐Carbon nanocomposites. The findings of this study indicate that the Fe3O4‐Carbon nanocomposites nanostructures exhibit promising attributes as an electrocatalyst for the oxygen evolution reaction (OER) in real‐world scenarios. [ABSTRACT FROM AUTHOR]