New Cathode Materials for the Anion Exchange Membrane Electrolyzer (AEM)

An anion exchange membrane electrolyzer (AEM) should combine the positive qualities of the Alkaline Water Electrolysis and the proton exchange membrane (PEM) Electrolysis – compactness, environmentally friendly, effectively and being economically priced. Here, we present improvements of the used sub...

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Bibliographic Details
Published in:Fuel cells (Weinheim an der Bergstrasse, Germany) Germany), 2014-10, Vol.14 (5), p.720-727
Main Authors: Manolova, M., Schoeberl, C., Bretzler, R., Freudenberger, R.
Format: Article
Language:English
Subjects:
Alloys
Anion Exchange Membrane Electrolyzer (AEM)
Catalyst Layer
Electrolytes
Fuel cells
Hydrogen evolution
Polarization Curves
Substrates
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Summary:An anion exchange membrane electrolyzer (AEM) should combine the positive qualities of the Alkaline Water Electrolysis and the proton exchange membrane (PEM) Electrolysis – compactness, environmentally friendly, effectively and being economically priced. Here, we present improvements of the used substrate materials and of the deposited coatings for developing an AEM with such characteristics. Ni‐wire mesh, stainless steel non‐woven fabrics and stainless steel web were tested as cathode substrate. Base alloys of NiWTiOx, CoNiMoW, CoMn, porous Ni, and porous Ni with TiOx were potentiostatically and galvanostatically deposited. The effect of a single substrate and electrolyte component is graphically shown. We established that, the rougher the structure of an alloy is, the better the electrochemical properties are. The cathode separators were analyzed through EDS‐analysis, light microscopy and REM‐investigations. The electrochemical characterizing was performed galvanostatically in 1 M KOH. The combination substrate‐alloy, which shows the very best electrochemical properties, will be tested in real conditions.
ISSN:1615-6846
1615-6854
DOI:10.1002/fuce.201300228