Cathode materials for solid oxide electrolysis cells

Peter Holtappels, John T S Irvine, Shu Wang

Research output: Chapter in Book/Report/Conference proceedingChapter


The cathode in solid oxide electrolysis cells is the electrode at which water and carbon dioxide can be split into hydrogen, carbon monoxide, and oxygen ions. The state-of-the-art material is a Ni cermet, as developed for solid oxide fuel cells. This electrode shows promising electrolysis rates and compatibility with adjacent cell components, and a basic understanding of its electrode processes has also been gained. However, stability issues have recently triggered a search for alternative materials. Electronically conducting oxides, with or without activation by submicron-scale electrocatalysts, are of interest because of their stability in high water contents, as described in the last part of this chapter.
Original languageEnglish
Title of host publicationHigh-temperature electrolysis
Subtitle of host publicationfrom fundamentals to applications
EditorsWerner Sitte, Rotraut Merkle
Place of PublicationBristol
PublisherIOP Publishing Ltd.
Number of pages24
ISBN (Electronic)9780750339513
ISBN (Print)9780750339490
Publication statusPublished - 1 Jan 2023


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