Küçükdeveci, Can Barış (2005) EFFECT OF DIFFERENT ELECTRODES AND MEMBRANES ON THE ELECTROCATALYTIC ACTIVITY AND THE STABILITY OF POLYMER ELECTROLYTE MEMBRANE FUEL CELLS WITHIN AN ALKALI SOLUTION. Other thesis, TED ANKARA COLLEGE FOUNDATION HIGH SCHOOL.
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Abstract
In this project, the electrocatalytic activity and stability of polymer electrolyte fuel cells (PEMFC), which are prepared by using Pt (platinum), Pd (palladium) and Ag (silver) metals; Nylon and Vileda membranes, within a 2 M NaOH (sodium hydroxide) solution, are examined. The aim of this study is to find alternatives to the Pt metal, which is mostly used in this technology, due to its high cost and limited sources. In addition, it is intended to find membranes that will substitute the Nafion membrane, which is the ideal membrane in PEM fuel cells. For the fuel cells, which are prepared by using each electrode and membrane, 4 trials are done. In these experiments, for each combination, the potential versus time graphs are drawn to compare the precision and electrocatalytic activity of the fuel cells. Besides, logarithms of hydrogen ion concentrations versus time graphs are drawn to determine the membranes’ effect. In the conclusion of the project, the highest electrocatalytic activity is observed in the cells with Pt electrode-Vileda membrane and Pd electrode-Nylon membrane. The results with Ag metal were not satisfactory like the other metals; the cells with Ag metals have low electrocatalytic activity when compared with other membranes. When the membranes are compared for each of the electrodes, similar results are observed. The change in the concentration of hydrogen ions with time is less in the Nylon membrane than in Vileda membrane. Thus, Nylon membrane shows more stable than the Vileda about the transferring of the hydrogen ions. To conclude, Pd is the best alternative to Pt electrode while Nylon membrane is the best alternative to Nafion membrane. In addition, it is concluded that with each electrode, a variety of membranes must be used to examine the electrocatalytic activity of the PEM fuel cells.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | Supervisor’s Name: Sedef Eryurt |
| Uncontrolled Keywords: | electrocatalytic activity, polymer electrolyte fuel cells, Pt metal, fuel cells |
| Subjects: | Q Science > QD Chemistry |
| Depositing User: | Kamil Çömlekçi |
| Date Deposited: | 29 Jun 2009 09:03 |
| Last Modified: | 15 Apr 2019 11:12 |
| URI: | http://tedprints.tedankara.k12.tr/id/eprint/60 |
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