Chemistry: electrical and wave energy – Processes and products
Patent
1982-11-16
1989-05-23
Niebling, John F.
Chemistry: electrical and wave energy
Processes and products
204129, 204283, C25B 102, C25B 114
Patent
active
048328057
ABSTRACT:
A unitary membrane-electrode assembly includes a structure with multiple layers having different overvoltages for the desired electrochemical reaction. The layer attached to the membrane has a higher overvoltage for the electrochemical reaction than the electrode layer attached to its upper surface thereby preferentially locating the electrochemical reaction zone a small but controlled distance away from the membrane surface. In an alkali metal halide or alkali metal sulfate electrolysis process the use of a unitary dual layer structure with a bonded remote electrode is particularly useful as a cathode side structure because it eliminates formation of concentrated caustic at the membrane surface. As a result, back migration of OH.sup.- ions is reduced and cathodic current efficiency is increased.
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patent: 4100050 (1978-07-01), Cook et al.
patent: 4340452 (1982-07-01), de Nora
patent: 4364803 (1982-12-01), Nidola et al.
patent: 4381979 (1983-05-01), de Nora et al.
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Coker Thomas G.
LaConti Anthony B.
General Electric Company
Gorgos Kathryn
Niebling John F.
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