Electrochemical study of copper ferrite as a catalyst for CO2 photoelectrochemical reduction

Karim, Kaykobad Md Rezaul and Huei, Ruey Ong and Hamidah, Abdullah and Yousuf, Abu and Cheng, C. K. and Khan, Maksudur R. (2018) Electrochemical study of copper ferrite as a catalyst for CO2 photoelectrochemical reduction. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2). pp. 236-244. ISSN 1978-2993

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In this work, p-type CuFe2O4 was synthesized by sol gel method. The prepared CuFe2O4 was used as photocathode catalyst for photoelectrochemical (PEC) CO2 reduction. The XRD, UV-Visible Spectroscopy (UV-Vis), and Mott-Schottky (MS) experiments were done to characterize the catalyst. Linear sweep voltammetry (LSV) was employed to evaluate the visible light (λ>400 nm) effect of this catalyst for CO2 reduction. The band gap energy of the catalyst was calculated from the UV-Vis and was found 1.30 eV. Flat band potential of the prepared CuFe2O4 was also calculated and found 0.27 V versus Ag/AgCl. Under light irradiation in the CO2-saturated NaHCO3 solution, a remarkable current development associated with CO2 reduction was found during LSV for the prepared electrode from onset potential -0.89 V with a peak current emerged at -1.01 V (vs Ag/AgCl) representing the occurrence of CO2 reduction reaction. In addition, the mechanism of PEC was proposed for the photocathode where the necessity of a bias potential in the range of 0.27 to ~ -1.0 V vs Ag/AgCl was identified which could effectively inhibit the electron-hole (e-/h+) recombination process leading to an enhancement of CO2 reduction reactions.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: CuFe2O4; CO2 reduction; Onset potential; Photoelectrochemical reduction; Linear sweep voltammetry
Subjects: T Technology > T Technology (General)
T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Faculty of Engineering Technology
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 30 Aug 2018 04:03
Last Modified: 30 Aug 2018 04:03
URI: http://umpir.ump.edu.my/id/eprint/21347
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