Abstract
The Cover Feature shows the identified performance limitation in oxygen depolarized cathodes, which are key components for energy-saving chlor-alkali electrolysis. A one-dimensional, dynamic three-phase model aided in elucidating that the overall performance of the electrode is limited by the accumulation and slow removal of the produced hydroxide ions from the reaction zone. The high hydroxide ion concentration significantly decreases solubility and transport of the main reactant (oxygen) to the reaction zone and, thus, limits the maximum current. More information can be found in the Full Paper by Röhe et al. on page 2373 in Issue 11, 2019 (DOI: 10.1002/cssc.201900312).
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