| Sputtering ultra small Pt on nanographitic flakes deposited by electrophoresis for ethanol electrooxidation |
| Paper ID : 1032-UFGNSM-FULL |
| Authors: |
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Mohammad Ahmadi Daryakenari1, Hamid Omidvar1, Ahmad Ahmadi Daryakenari *2 1Renewable Energy Research Center, Amirkabir University of Technology 2Rasht, Guilan University |
| Abstract: |
| A direct ethanol fuel cell (DEFC) benefits from electricity generation with much higher energy efficiency compared to combustion engines, is non-toxicity, higher safety, natural availability, and greenhouse gas-free. Electrophoretic deposition (EPD) is an economical and versatile processing technique that has been applied in deposition of different coatings and films. A copper substrate was used as positive electrode, and a indium tin oxide (ITO)-coated conductive glass as negative electrode. The distance between the two electrodes was 20 mm, and the applied voltage was 50–200 V for 10 min. The EPD deposition on ITO was done in a nanographitic flakes suspension consisted of isopropyl alcohol (20 ml) and nanographitic flakes powder (5 mg). 5mg of Mg(NO3)2 6H2O as charger was added, to render the nanographitic flakes sheets positively. Finally, Pt was sputtered onto the nanographitic flakes layers under vacuum by a simple sputtering machine (Quick Coater, SC 701). Electro-oxidation towards ethanol was carried out in an aqueous solution containing 0.5 mol/L sodium hydroxide and 1 mol/L ethanol, using cyclic voltammetry (CV) measurement technique, sweeping from -1 V to 0.5 V at a scan rate of 50 mV s-1 (Fig. 1). It can be readily seen that the sample prepared at 100 V shows the best electrocatalytic oxidation of C2H5OH compared with the other samples. This behavior is due to not occurring agglomeration of nanographitic flakes powder along with minimum density of nanographitic flakes defects for sample made by 100 V of EPD. SEM and TEM images and also Raman and XPS spectroscopy from the samples are evidences to explain the behavior. |
| Keywords: |
| Electrophoretic deposition, Sputtering Pt, Ethanol electro-oxidation |
| Status : Paper Accepted (Poster Presentation) |
