What is Next in Anion-Exchange Membrane Water Electrolyzers? Bottlenecks, Benefits, and Future

Carlo Santoro, Alessandro Lavacchi, Piercarlo Mustarelli, Vito Di Noto, Lior Elbaz, Dario R. Dekel, Frédéric Jaouen

Research output: Contribution to journalReview articlepeer-review

72 Scopus citations


As highlighted by the recent roadmaps from the European Union and the United States, water electrolysis is the most valuable high-intensity technology for producing green hydrogen. Currently, two commercial low-temperature water electrolyzer technologies exist: alkaline water electrolyzer (A-WE) and proton-exchange membrane water electrolyzer (PEM-WE). However, both have major drawbacks. A-WE shows low productivity and efficiency, while PEM-WE uses a significant amount of critical raw materials. Lately, the use of anion-exchange membrane water electrolyzers (AEM-WE) has been proposed to overcome the limitations of the current commercial systems. AEM-WE could become the cornerstone to achieve an intense, safe, and resilient green hydrogen production to fulfill the hydrogen targets to achieve the 2050 decarbonization goals. Here, the status of AEM-WE development is discussed, with a focus on the most critical aspects for research and highlighting the potential routes for overcoming the remaining issues. The Review closes with the future perspective on the AEM-WE research indicating the targets to be achieved.

Original languageEnglish
Article numbere202200027
Issue number8
StatePublished - 22 Apr 2022

Bibliographical note

Publisher Copyright:
© 2022 The Authors. ChemSusChem published by Wiley-VCH GmbH.


  • anion-exchange membrane
  • electrocatalysis
  • electrolyzers
  • platinum-group metal-free
  • water electrolysis


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