NDLI: Degradation of anion exchange membranes used for hydrogen production by ultrapure water electrolysis

Content Provider	Royal Society of Chemistry (RSC)
Author	Arges, Christopher G. Ramani, Vijay Anderson, Everett B. Parrondo, Javier Niedzwiecki, Mike Ayers, Katherine E.
Copyright Year	2014
Abstract	Solid-state alkaline water electrolysis using a pure water feed offers several distinct advantages over liquid alkaline electrolyte water electrolysis and proton exchange membrane water electrolysis. These advantages include a larger array of electrocatalyst available for oxygen evolution, no electrolyte management, and the ability to apply differential pressure. To date, there have been only a handful of reports on solid-state alkaline water electrolyzers using anion exchange membranes (AEMs), and there have been no reports that investigate loss in system performance over time. In this work, a solid-state alkaline water electrolyzer was successfully demonstrated with several types of polysulfone-based AEMs using a relatively expensive but highly active lead ruthenate pyrochlore electrocatalyst for the oxygen evolution reaction. The electrolysis of ultrapure water at 50 °C resulted in a current density of 400 mA cm−2 at 1.80 V. We demonstrated that the short-term degradation of water electrolyzer performance over time was largely a consequence of carbon dioxide intrusion into the system and could be easily remedied, while long-term deterioration was a consequence of irreversible AEM polymer degradation.
Starting Page	9875
Ending Page	9879
Page Count	5
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	4
Issue Number	19
Journal	RSC Advances
DOI	10.1039/c3ra46630b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Pyrochlore Electrolyte Polymer degradation Electrolysis of water Carbon dioxide Oxygen evolution AEM Alkaline water electrolysis Ion Proton-exchange membrane Ultrapure water Current density
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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