Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1988-06-29
1989-10-17
Kaplan, G. L.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
502339, G01N 2742
Patent
active
048745014
ABSTRACT:
An electrochemical measuring electrode device (10) for polarographically measuring the partial pressure of oxygen in an electrolytic medium comprises a cathode (14) which is capable of reducing oxygen and defines an exposed oxygen-reducing cathode surface (20), an anode (18), which defines an exposed anode surface which is arranged relative to the exposed oxygen-reducing cathode surface so as to communicate electrolytically therewith through the electrolytic medium, and a membrane (24), which covers the exposed oxygen-reducing cathode surface and further defines an electrolyte chamber (22) in which the electrolytic medium is confined. In order to effectively promote the decomposition of H.sub.2 O.sub.2 generated in the electrolytic medium as an oxygen reduction intermediate and thereby reduce the response time of the electrode, a stable, non-biological catalytic means is provided catalytically communicating with the H.sub.2 O.sub.2. The stable, non-biological catalytic means is preferably constituted by platinum black particles which may be received by the membrane at a central region (42) thereof or alternatively be received by a support structure which may further constitute a covering of at least part of the membrane ( 24).
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A. B. LaConti et al., J. Electrochem. Soc., pp. 506-510, Mar. 1971.
Patent Abstracts of Japan, vol. 8, No. 86, (p. 269), (1523), 4/19/84; and JP 59003345(1), (Hitachi Seiakusho), 1/10/84, (abstract).
Patent Abstracts of Japan, vol. 6, No. 121, (p. 126), (999), 7/6/82; and JP 57046154(1), (Toyota Jidosha), 3/16/82, (abstract).
Christiansen Torben F.
Kokholm Finn
Kaplan G. L.
Radiometer A/S
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