Synergistic effect of Fe and BiOCl in enhancing electrocatalytic performance for oxygen evolution reaction

Vaibhav Lokhande; Daehan Youn; Dhanaji Malavekar; Taeksoo Ji

doi:10.1016/j.heliyon.2023.e20811

Synergistic effect of Fe and BiOCl in enhancing electrocatalytic performance for oxygen evolution reaction

Heliyon. 2023 Oct 9;9(10):e20811. doi: 10.1016/j.heliyon.2023.e20811. eCollection 2023 Oct.

Authors

Vaibhav Lokhande¹, Daehan Youn², Dhanaji Malavekar³, Taeksoo Ji^{1

2}

Affiliations

¹ Department of Electronics Engineering, Chonnam National University, Gwangju, 61186, South Korea.
² Department of ICT Convergence System Engineering, Chonnam National University, Gwangju, 61186, South Korea.
³ Optoelectronic Convergence Research Center, Department of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, South Korea.

Abstract

Fe was added to bismuth oxychloride (BiOCl) to improve its oxygen evolution reaction(OER) catalytic activity. X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), EDS, and X-ray photoelectron spectroscopy (XPS) were used to analyze the material that was produced. Many electrochemical techniques, including linear sweep voltammetry (LSV), Mott Schottky, and electrochemical impedance spectroscopy (EIS), were used to conduct the electrochemical studies of Fe doped BiOCl. Fe doped BiOCl exhibited enhanced catalytic performance compared to pristine BiOCl. The best performance was observed for 0.75 M Fe doped BiOCl sample. It recorded lowest overpotential of 354 mV @ 10 mA cm^-2 and Tafel slope of 167 mV dec^-1. The synergistic effect of Fe doping from structural, chemical and catalytic perspective has been analyzed and presented.

Keywords: Bismuth; Dopant; Iron; Mott-Schottky; OER; Overpotential; Tafel; Water splitting.