The electrochemistry of porous zinc—III. Plain and polymer-bonded porous microelectrodes in perchlorate solutions
✍ Scribed by P.F. Maher; A.J.S. McNeil; N.A. Hampson
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 718 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
The results of an impedance study of the electrochemistry of solid, plain porous and porous polymeric (incorporating polystyrene) zinc electrodes in t MNaCIO 4 solution are presented . The transformation of the solid zinc electrode to the porous format results in great enhancement of reaction rules, but this is subject to limitations on removal of reaction products by mass transfer. Thus porous electrodes are prone to gas-filling by the HER, and to film formation and pore plugging at anodic overpotentials . The incorporation of moderate (10%) amounts of an electro-inactive polymer, such as polystyrene, have little effect on electrode activity . Larger amounts (50%) tun produce an anomalous electrode which appears perfectly porous, but which can be little more active than the solid electrode .