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http://nopr.niscpr.res.in/handle/123456789/15717| Title: | Preparation and chronopotentiometric characterization of platinum deposited anionic membranes |
| Authors: | Shahi, V K Ray, P Dave, N J Ramachandraiah, G Rangarajan, R |
| Issue Date: | May-1999 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Platinum metal has been deposited on an anion exchange membrane by electroless plating. In this method, a solution of 2 mM platinic chloride placed on one side of the membrane which was mounted horizontally in a vertical cell has been allowed to react with 1% hydrazine hydrate from the other side for 30, 60 and 90 min to have different metallated membranes. The quantity of the deposited platinum has been estimated by differential pulse polarography. Electrical properties of these metallated membranes have been examined by chronopotentiometry in dilute sodium chloride solutions. The parameters such as transition time (τ), the potential drop (Eo) across the membrane instantly after the application of a constant current (I), the equilibrium potential (Ecq) and Iτ1/2 have been measured and compared with those of undeposited membrane. The results reveal that the membrane has been found to be reduced gradually with the increase in deposited metal thickness. The approximate percentage of metal coverage and the number of ionic sites masked by the deposited metal in terms of molar concentration have also been estimated for a given NaCl concentration. |
| Page(s): | 486-490 |
| Appears in Collections: | IJC-A Vol.38A(05) [May 1999] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 38A(5) 486-490.pdf | 1.12 MB | Adobe PDF | View/Open |
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