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Silver/titania nanocomposite-modified photoelectrodes for photoelectrocatalytic methanol oxidation


Lim, Su Pei and Pandikumar, Alagarsamy and Huang, Nay Ming and Lim, Hong Ngee (2014) Silver/titania nanocomposite-modified photoelectrodes for photoelectrocatalytic methanol oxidation. International Journal of Hydrogen Energy, 39 (27). pp. 14720-14729. ISSN 0360-3199; ESSN: 1879-3487


Silver deposited titania (Ag/TiO2) nanocomposite thin films were fabricated by the simple sonochemical deposition of Ag on preformed aerosol-assisted chemical vapor deposited TiO2 thin films. The photelectrocatalytic performance of a newly fabricated Ag/TiO2-modified photoelectrode was studied for methanol oxidation under simulated solar AM 1.5G irradiation (100 mW/cm2). The Ag/TiO2-modified photoelectrode showed a photocurrent density of 1 mA/cm2, which is four times that of an unmodified TiO2 photoelectrode. The modification of Ag on the TiO2 surface significantly enhanced the photoelectrocatalytic performance by improving the interfacial charge transfer processes, which minimized the charge recombination. Density functional theory (DFT) calculation studies revealed that methanol could be easily adsorbed onto the Ag surfaces of Ag/TiO2 via a partial electron transfer from Ag to methanol. The newly fabricated Ag/TiO2-modified photoelectrode could be a promising candidate for photoelectrochemical applications.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1016/j.ijhydene.2014.07.066
Publisher: Elsevier
Keywords: Ag/TiO2; Thin film; Photoelectrochemistry; AACVD; Methanol oxidation
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 05 Jan 2016 07:03
Last Modified: 04 Mar 2016 00:30
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.ijhydene.2014.07.066
URI: http://psasir.upm.edu.my/id/eprint/35375
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