Yusoff, N. and Kumar, S.V. and Rameshkumar, P. and Pandikumar, A. and Shahid, M.M. and Rahman, M.A. and Huang, N.M. (2016) A Facile Preparation of Titanium Dioxide-Iron Oxide@Silicon Dioxide Incorporated Reduced Graphene Oxide Nanohybrid for Electrooxidation of Methanol in Alkaline Medium. Electrochimica Acta, 192. pp. 167-176. ISSN 0013-4686, DOI https://doi.org/10.1016/j.electacta.2016.01.190.
Full text not available from this repository.Abstract
An iron oxide-silicon dioxide coated titanium dioxide (TiO2-Fe2O3@SiO2) incorporated reduced graphene oxide (rGO) nanohybrid was prepared by a simple hydrothermal method using titanium tetraisopropoxide (TTIP) and graphite flakes as the precursors. Tetraethoxysilane (TEOS) was used to form a SiO2 coating on Fe2O3 nanoparticle surface (Fe2O3@SiO2). The presence of SiO2 layer would facilitate the formation of Fe2O3 on the TiO2 surface by an electrostatic attraction that led to the formation of TiO2-Fe2O3@SiO2. The transmission electron microscopy (TEM) results revealed the successful attachment of Fe2O3@SiO2 particles to the TiO2 surface and a uniform distribution of TiO2-Fe2O3@SiO2 composites on the rGO sheet. Furthermore, the rGO/TiO2-Fe2O3@SiO2 nanohybrid modified platinum (Pt) electrode was used for the electrocatalytic oxidation of methanol in alkaline medium. The rGO/TiO2-Fe2O3@SiO2 nanohybrid with weight ratio of 1:3:1 (rGO:TiO2:Fe2O3) showed a higher electrocatalytic activity toward methanol oxidation with an anodic peak current density of 2.45 mA/cm2. Moreover, the nanohybrid displayed a higher stability with 91.58% retention of the initial current density after 5000 s in long term current-time curve. This newly prepared rGO/TiO2-Fe2O3@SiO2 nanohybrid could be a promising anodic catalyst for the direct methanol fuel cells (DMFCs) application.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya: Postgraduate Research Fund (PG122-2014b), Ministry of Higher Education of Malaysia: High Impact Research Grant (UM.C/625/1/HIR/MOHE/05) |
| Uncontrolled Keywords: | Iron oxide; Titanium dioxide; Reduced graphene oxide; Nanohybrid; Methanol oxidation |
| Subjects: | Q Science > QC Physics T Technology > TP Chemical technology |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 28 May 2018 02:26 |
| Last Modified: | 28 May 2018 02:26 |
| URI: | http://eprints.um.edu.my/id/eprint/18735 |
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