Electrochemical Study of Copper Ferrite as a Catalyst for CO2 Photoelectrochemical Reduction

Kaykobad Md. Rezaul Karim  -  Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, , Malaysia
Huei Ruey Ong  -  1Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Kuantan, Pahang , Malaysia
Hamidah Abdullah  -  Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, , Malaysia
Abu Yousuf  -  Faculty of Engineering Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak, , Malaysia
Chin Kui Cheng  -  Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, , Malaysia
*Mohd. Maksudur Rahman Khan  -  Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, , Malaysia
Received: 4 Jul 2017; Revised: 5 Nov 2017; Accepted: 15 Nov 2017; Published: 1 Aug 2018; Available online: 11 Jun 2018.
Open Access Copyright (c) 2018 Bulletin of Chemical Reaction Engineering & Catalysis
License URL: http://creativecommons.org/licenses/by-sa/4.0

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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. Copyright © 2018 BCREC Group. All rights reserved

Received: 4th July 2017; Revised: 5th November 2017; Accepted: 15th November 2017; Available online: 11st June 2018; Published regularly: 1st August 2018

How to Cite: Karim, K.M.R., Ong, H.R., Abdullah, H., Yousuf, A., Cheng, C.K., Khan, M.K.R. (2018). Electrochemical Study of Copper Ferrite as a Catalyst for CO2 Photoelectrochemical Reduction. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 236-244 (doi:10.9767/bcrec.13.2.1317.236-244)


Keywords: CuFe2O4; CO2 reduction; onset potential; photoelectrochemical reduction; linear sweep voltammetry

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