A tri-metallic (Mn-Co-Ti) oxide photoanode with improved photo-conversion efficiency

Mansoor, Muhammad Adil and Hamzah, Khafidz. and Naeem, Rabia and Zubir, Mohd Nashrul Bin Mohd and Yahaya, Nur Azirah and Yusof, F. B. and Rozali, Shaifulazuar Bin and Aspanut, Zarina Binti and Ming, Hainan (2021) A tri-metallic (Mn-Co-Ti) oxide photoanode with improved photo-conversion efficiency. Russian Journal of Inorganic Chemistry, 66 (6). pp. 806-813. ISSN 0036-0236, DOI https://doi.org/10.1134/S0036023621060139.

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In extension to our previous work, studies have been conducted to illustrate the effect of incorporation of Co2O3 on photo-conversion efficiency of Mn2O3-4TiO(2) composite thin films. Therefore, the bimetallic crystal Mn2Ti4(TFA)(8)(THF)(6)(OH)(4)(O)(2)].0.4THF (1) was mixed with Co(OAc)(2) to fabricate Mn2O3-Co2O3-4TiO(2) (MCT) thin films via aerosol-assisted chemical vapour deposition (AACVD) method. The thin films were properly characterized by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray (EDX), Atomic Force Microscopy (AFM) and UV-Vis spectroscopy to evaluate their crystalline structure, chemical composition, topography, surface roughness and band gaps. Finally, the films were subjected to record their photo-electrochemical response in terms of Linear Scan Voltammetry (LSV) and Electrochemical Impedance Spectroscopy (EIS) using 0.5 M NaOH electrolyte solution. A photocurrent density of 4.91 mA cm(-2) was observed at 0.65 V vs Ag/AgCl/3M KCl with a promising photo conversion efficiency of 2.86%. Furthermore, impedance studies revealed a decrease in charge transfer resistance (R-ct) from 123.79 to 56.43 ohm under illumination conditions.

Item Type: Article
Funders: University of Malaya, Research University Grant-Faculty Program[RF014A-2018], University of Malaya, Research University Grant-Faculty Program[GPF019A-2019], Higher Education Commission of Pakistan[20-12197/NRPU/RGM/RD/HEC/2020]
Uncontrolled Keywords: Mn-Co-Ti composite oxide;Synergistic effect;Photoanode; Photoelectrochemical;Thin film
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science
Depositing User: Ms Zaharah Ramly
Date Deposited: 09 Sep 2022 02:00
Last Modified: 09 Sep 2022 02:00
URI: http://eprints.um.edu.my/id/eprint/34227

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