Method for the manufacture of a silver catalyst for electrochemi

Details Method for the manufacture of a silver catalyst for electrochemi Method for the manufacture of a silver catalyst for electrochemi

1978-02-23

1978-12-26

Shine, W. J.

Compositions

X-ray or neutron shield

2524253, 429 44, B01J 2368, B01J 2380, B01S 2384

Patent

active

041315707

ABSTRACT:
The invention relates to a method for manufacturing a silver catalyst for electrochemical cells, wherein metallic silver is precipitated on a metal hydroxide gel by reduction of a silver salt. According to the invention, a silver-mercury alloy is precipitated on the metal hydroxide gel by simultaneous reduction of the silver salt and a mercury salt, the mercury content of the catalyst being between about 10 and 17% by weight, referred to the total weight, and the metal hydroxide content of the catalyst is preferably between about 1.5 and 2.0% by weight, referred to the silver. Catalysts prepared according to the method of this invention are particularly useful as catalysts for air electrodes of fuel cells having excellent long-term behavior.

REFERENCES:
patent: 3318736 (1967-05-01), Barber
patent: 3900342 (1975-08-01), Hohne et al.

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