Process for preparing raw materials for reaction layer of gas pe

Details Process for preparing raw materials for reaction layer of gas pe Process for preparing raw materials for reaction layer of gas pe

1988-12-13

1992-06-23

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204290R, 204291, 429 42, C25B 1112

Patent

active

051240181

ABSTRACT:
Disclosed herein are processes for preparing a raw material dispersion and raw material powders for producing reaction layers of a gas permeable electrode. The raw materials are prepared in one aspect of the invention by mixing fine particles containing a surface-active agent, freezing the mixture to a temperature the surface-active agent loses at least part of its function and then thawing out the same. The resulting material exhibits superior catalytic performance because the particles are dispersed uniformly by lack of the function of surfaceactive agent at the time of freezing.
The raw materials are prepared in another aspect of the invention by mixing hydrophilic minute particles coated with ion exchange resin, PTFE and hydrophobic fine powders. The resulting material exhibits superior catalytic performance because catalysts contained in the hydrophilic minute particles are neither liberated nor made to flow so that the initial catalytic activities are substantially maintained even after a relatively long period of use.

REFERENCES:
patent: 4389297 (1983-06-01), Korach
patent: 4581116 (1986-04-01), Plowman et al.

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