Performance of Methanol Electro-Oxidation on a Ternary Pt–Ru–Ni Catalyst in DMFC
碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 99 === This study was to prepare the Pt-Ru-Ni alloy electrocatalyst for direct methanol fuel cells using Impregnation-reduction with three different reductants. The process of this work was divided into two steps. The first step was to use Enhylene glycol, Formic a...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/e653vp |
| Summary: | 碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 99 === This study was to prepare the Pt-Ru-Ni alloy electrocatalyst for direct methanol fuel cells using Impregnation-reduction with three different reductants. The process of this work was divided into two steps. The first step was to use Enhylene glycol, Formic acid, NaBH4 ehthylene glycol as the reductants respectively to reduce hexachlorplatinic acid into Pt-Ru-Ni nanoparticles. Dispersion stability of the electrocatalyst nanoparticles on multi-walled carbon nanotube was examined respectively by changing the volumetric ratio of Pt-Ru-Ni and evaluated the catalytic activity of the catalysts by cyclic voltammetry (CV).
The second was to prepare Membrane and Electrode Assembly(MEA) with the best catalytic activity of the Pt:Ru:Ni(40:20:40) electrocatalyst under I-V characteristic curve for cyclic voltammetry. The catalysts used at the anode and cathode were applied on the membrane by a spraying method, sandwiched with carbon cloth, and hot pressed by changing temperature and pressure. The loading of the alloy electrocatalyst on electodes was 0.387mg/cm2. MEA performance was evaluated using a DMFC single cell with a 12.25 cm2 cross-section area and measured with a potentiometer which recorded the cell potential from the circuit voltage under constant current condition. The result indicated that the performance of MEA prepared by using Formic acid as the reductants was better than using the Enhylene glycol.
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