Surface modification of Co<sub>3</sub>O<sub>4</sub> nanostructures using wide range of natural compounds from rotten apple juice for the efficient oxygen evolution reaction - Université de Lorraine Access content directly
Journal Articles International Journal of Hydrogen Energy Year : 2023

Surface modification of Co3O4 nanostructures using wide range of natural compounds from rotten apple juice for the efficient oxygen evolution reaction

Abdul Jaleel Laghari
Umair Aftab
Aqeel Ahmed Shah
Muhammad Yameen Solangi
Noha Naeim
Ayman Nafady
Brigitte Vigolo
Melanie Emo
Aneela Tahira
Zafar Hussain Ibhupoto

Abstract

In this study, a new strategy has been produced to use a rotten apple juice as a source for the surface modification of Co 3 O 4 nanostructures, giving rise to efficient electro-catalysts for driving oxygen evolution reaction (OER) at relatively low over potential. We have studied the 2 morphology, chemical composition, and crystalline aspects of Co 3 O 4 nanostructures using different analytical techniques. The Co 3 O 4 nanostructures grown with rotten apple juice were observed with low impurity of Fe and P, surface modification, reduced particle size, high concentration of oxygen vacancies, defects and cubic phase of Co 3 O 4. Furthermore, we have used the surface modified Co 3 O 4 nanostructures for water electrolysis and noticed the significant performance towards OER in alkaline conditions. The electrochemical characterization revealed that the Co 3 O 4 nanostructure prepared with 20 mL of rotten apple juice exhibits an overpotential value of 269 mV at 20 mA/cm 2 current density. The charge transport resistance (Rct) at the interface was estimated around 118.9 Ω, confirming an excellent reaction kinetics on the Co 3 O 4 nanostructures and highly supported efficient performance towards OER. The Co 3 O 4 nanostructures prepared with 20 mL of rotten apple juice has shown an acceptable durability for 40 h, verifying the long-term use. The performance of Co 3 O 4 nanostructures with apple juice could be attributed to high oxygen vacancies due to high density of Co 2+ ions on the surface, impurities of Fe and P, reduced nanoparticle size, defects in the structures, and favorable chemical composition. At the end, surface modified Co 3 O 4 nanostructures was observed as an outperformed electrocatalyst when prepared with rotten apple juice. Therefore, this can be used in diverse purposes including energy conversion and storage applications.
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hal-04197563 , version 1 (06-09-2023)

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Abdul Jaleel Laghari, Umair Aftab, Aqeel Ahmed Shah, Muhammad Yameen Solangi, Muhammad Ishaque Abro, et al.. Surface modification of Co3O4 nanostructures using wide range of natural compounds from rotten apple juice for the efficient oxygen evolution reaction. International Journal of Hydrogen Energy, 2023, 48 (41), pp.15447-15459. ⟨10.1016/j.ijhydene.2023.01.072⟩. ⟨hal-04197563⟩
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