Process for preparing electrodes using precious metal-catalyst c

Details Process for preparing electrodes using precious metal-catalyst c Process for preparing electrodes using precious metal-catalyst c

1982-02-22

1984-02-14

Konopka, P. E.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Making catalytic electrode, process only

427113, 264105, 502159, H01M 492, C25B 1103, C25B 1104, R01J 3128

Patent

active

044315678

ABSTRACT:
This disclosure is directed to preparing deashed, precious metal catalyst-containing, partially fluorinated active carbon particles of the formula CF.sub.x, where x ranges from 0.l to about 0.18, preferably using either platinum or silver as the catalyzing material, which can be incorporated into an active layer component of a gas electrode, e.g., an oxygen (air) cathode suitable for use in a chlor-alkali electrolytic cell for producing chlorine and caustic while conserving electrical energy. These particles are deashed to have a B.E.T. surface area of at least 600 m.sup.2 /g and contain less than about 4 weight percent ash. Active electrode layers containing such particles demonstrate an unusually desirable combination of resistance to corrosion, retention of conductive properties and retention of catalytic surface area.

REFERENCES:
patent: 3356532 (1967-10-01), Watanabe et al.
patent: 3385780 (1968-05-01), Feng
patent: 3409472 (1968-11-01), Weber et al.
patent: 3935029 (1976-01-01), Baker et al.
patent: 4135995 (1979-01-01), Welch
patent: 4166143 (1979-08-01), Petrow et al.
patent: 4187350 (1980-02-01), McIntyre
patent: 4299682 (1981-11-01), Oda et al.

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