Selective synthesis of methanol by photoelectrocatalytic reduction of CO2 over PANI-CuFe2O4 hybrid catalyst

Rezaul Karim, K. M. and Tarek, Mostafa and Sarkar, S. M. and Ong, H. R. and Hamidah, Abdullah and Cheng, C. K. and Khan, Maksudur R. (2020) Selective synthesis of methanol by photoelectrocatalytic reduction of CO2 over PANI-CuFe2O4 hybrid catalyst. In: IOP Conference Series: Materials Science and Engineering; Energy Security and Chemical Engineering Congress 2019, ESChE 2019 , 17 - 19 July 2019 , Kuala Lumpur, Malaysia. pp. 1-7., 736 (4). ISSN 1757-8981 (Print), 1757-899X (Online)

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In this work, a hybrid photocatalyst, PANI-CuFe2O4 was synthesized, characterized and used as a photocathode for the photoelectrocatalytic (PEC) reduction of CO2 to methanol selectively under 470 nm wavelength light irradiation at applied potential -0.4 V vs NHE. The PEC results showed that the combination of PANI with CuFe2O4 could increase the rate of PEC CO2 reduction to methanol owing to the increase of CO2 chemisorption at the photocathode surface and at the same time by facilitating the separation of photogenerated electron-hole (e−/h+) pairs during CO2 reduction. The rate of methanol formation was found maximum as 49.2 μmole g−1.h−1 with 73% Faradaic efficiency. The incident photon current efficiency (IPCE) and quantum efficiency (QE) for PEC CO2 reduction was achieved as 7.11% and 23.9% respectively. The PEC results demonstrated that the bias potential played a significant role in the separation of e−/h+ pairs and enhanced the PEC CO2 reduction activity of the hybrid photocatalyst.

Item Type: Conference or Workshop Item (Lecture)
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Photoelectrocatalytic; Fossil fuels; Hybrid photocatalyst
Subjects: T Technology > TP Chemical technology
Faculty/Division: Centre of Excellence: Centre of Excellence for Advanced Research in Fluid Flow
Institute of Postgraduate Studies
College of Engineering
Faculty of Chemical and Process Engineering Technology
Depositing User: Mrs Norsaini Abdul Samat
Date Deposited: 23 Jul 2021 08:17
Last Modified: 23 Jul 2021 08:17
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