Use of underpotential deposited layers of metals on foreign meta

Details Use of underpotential deposited layers of metals on foreign meta Use of underpotential deposited layers of metals on foreign meta

1982-12-30

1984-07-03

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Having earth feature

429 44, 429 46, H01M 492, H01M 808

Patent

active

044579861

ABSTRACT:
Fuel cell catalysts which are efficient, long-lived, and refurbishable in-situ include gold carrying a UPD deposit of another element. UPD Ag, Pt, Pd, Ir, Rh or Tl, Pb and Bi on Au crystallites are carried on and bonded to another substrate. The crystallites cause dissociative adsorption of the oxygen molecules so that four electrons are produced per molecule during the reduction reaction which is involved. In an alkaline electrolyte, the catalyst metals such as Pd, Ir, Ag, Rh and Pt show no tendency to poison the counter electrode (counter relative to the other electrode) since each of those metals is a good catalyst for both electrodes. Suitable fuels include methanol (CH.sub.3 OH), formaldehyde (HCHO), and formic acid (HCOOH).

REFERENCES:
patent: 3414439 (1968-12-01), Adlhart
patent: 3438815 (1969-04-01), Giner
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patent: 3506494 (1970-04-01), Adlhart
patent: 3854994 (1974-12-01), Binder
patent: 4127468 (1978-11-01), Alfenaar et al.
patent: 4186110 (1980-01-01), Jalan
patent: 4192907 (1980-03-01), Jalan et al.
patent: 4373014 (1983-02-01), Landsman et al.

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