Abstract
This chapter examines alkaline anion exchange membrane (AAEM) electrolysis, exploring both its advantages and challenges. A comprehensive overview of the fundamentals of water electrolyzers is provided. This is followed by a detailed discussion on the advantages and challenges faced by AEM electrolyzers in comparison to alkaline water electrolyzers (AWE) and proton exchange membrane electrolyzers (PEMWE). AEM chemistry and degradation mechanism was reviewed. The hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) electrocatalysis is discussed in terms of the activity descriptors, mechanism, and performance across a wide range of pH levels. Conclusion and recommendation were made on the advancement required in AEM water electrolyzers performance, durability and scale up challenges to enable rapid deployment and competitive green hydrogen production to meet global NetZero hydrogen ambitions.
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