Application of response surface methodology for optimization of the test condition of oxygen evolution reaction over La0.8Ba0.2CoO3 perovskite-active carbon composite

Elham Mahmoudi; Elnaz Asghari; Nagihan Delibaş; Aligholi Niaei

doi:10.1038/s41598-023-49836-1

Application of response surface methodology for optimization of the test condition of oxygen evolution reaction over La_0.8Ba_0.2CoO₃ perovskite-active carbon composite

Sci Rep. 2023 Dec 18;13(1):22878. doi: 10.1038/s41598-023-49836-1.

Authors

Elham Mahmoudi¹, Elnaz Asghari², Nagihan Delibaş³, Aligholi Niaei^{4

5}

Affiliations

¹ Department of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, 5166616471, Iran.
² Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
³ Department of Physics, Faculty of Art and Science, Sakarya University, Sakarya, Turkey.
⁴ Department of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, 5166616471, Iran. ali.niaei@gmail.com.
⁵ Department of Physics, Faculty of Art and Science, Sakarya University, Sakarya, Turkey. ali.niaei@gmail.com.

Abstract

The Experimental Design was applied to optimize the electrocatalytic activity of La_0.8Ba_0.2CoO₃ perovskite oxide/Active Carbon composite material in the alkaline solution for the Oxygen Evolution Reaction. After the preparation of La_0.8Ba_0.2CoO₃, and structural characterizations, the experimental design was utilized to determine the optimal amount of the composite material and testing conditions. The overpotential was defined as the response variable, and the mass ratio of perovskite/active carbon, Potassium hydroxide (KOH) concentration, and Poly(vinylidene fluoride) (PVDF) amount were considered effective parameters. The significance of model terms is demonstrated by P-values less than 0.0500. The proposed prediction model determined the optimal amounts of 0.665 mg of PVDF, a KOH concentration of 0.609 M, and A perovskite/Active Carbon mass ratio of 2.81 with 308.22 mV overpotential (2.27% greater than the actual overpotential). The stability test of the optimized electrode material over 24 h suggests that it could be a good candidate electrocatalyst for OER with reusability potential.