Comparative Study for the Electrodeposited Cadmium Chalcogenide by Potentiostatic and Potentiodynamic Methods for Electrochemical Reduction of CO2

Gelany, Amira; Mohran, Hossnia S.; Elrouby, Mahmoud

doi:10.21608/sjsci.2024.236449.1123

	Comparative Study for the Electrodeposited Cadmium Chalcogenide by Potentiostatic and Potentiodynamic Methods for Electrochemical Reduction of CO2
Sohag Journal of Sciences
Volume 9, Issue 2, June 2024, Page 152-158 PDF (754.61 K)
Document Type: Regular Articles
DOI: 10.21608/sjsci.2024.236449.1123
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Authors
Amira Gelany ¹; Hossnia S. Mohran¹; Mahmoud Elrouby ¹^{, 2}
¹Department of Chemistry, Faculty of Science, Sohag University, Sohag 82524, Egypt.
²King Salman International University, Faculty of Science, Ras Sudr, 46612, Sinai, Egypt.
Abstract
Electrochemically synthesized cadmium sulfide (CdS) on cupper-modified substrate from an acidic solution containing Cd²⁺ and S₂O₃^2- ions at 20^oC has been produced with potentiostatic and potentiodynamic methods utilizing a three-electrode system. The prepared films have been characterized utilizing X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). X-ray diffraction analyses demonstrate that, under our optimized conditions, the CdS thin films deposited using both methods exhibit a pure and hexagonal structure. The electrodeposited CdS was found to behave as a p-type semiconductor, which was examined and demonstrated via the Mott-Schottky measurement. Depending upon the obtained data in this work, it was discovered that the electrodeposition techniques affect the morphology of the electrodeposited material (confirmed by SEM), carrier concentrations, thickness δ_SC of the space-charge layer, the energy gap (E_g), as well as the sensitivity towards CO₂ electro-reduction.
Keywords
CO2; Electrochemical deposition; Photo electrochemical; Potentiostatic; Potentiodynamics


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