Chandrasekaran, R. and Arulraj, I. and Pattabiraman, R. and Dheenadayalan, S. and Muzhumathi, S. and Venkatesan, V.K.
(1988)
High performance porous gas diffusion electrodes for oxygen reducti alkaline fuel cells.
Bulletin of Electrochemistry , 04 (08).
pp. 723-728.
ISSN 0256-1654
Abstract
Porous gas diffusion electrodes of two layer and three layer type are prepared by cold compacting and sintering technique. The optimum concentration of acetylene black is 2 wt% and activated charcoal is 10 wt%. The incorporation of silver by different techniques like thermal decomposition of silver salts is presented. The amount of silver varies from 53 mg.cm-2 to 106 mg.cm-2. Electrode area is 30 cmz. The electrodes were polarised as oxygen gas diffusion electrodes in 6.0 M KOH solution
at 333K.The electrodes were found to be polarised to -145 mV at 60 mA.cm-2 and to -190 mV at 80 mA.cm9 at 333K.
These electrodes have been tested continuously and were found to show the same performance for 500 hrs -1000 hrs.
The performance of the same was compared with the electrode containing acetylene black, heat treated and untreated in nitrogen atmosphere at 1073K for 20 hours. Incorporation of platinised acetylene black (carbon) as electrocatalyst for oxygen reduction has also been attempted
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