Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis

International Journal of Energy ResearchVolume 46, Issue 3 p. 2241-2276 REVIEW PAPER Recent developments on transition metal–based electrocatalysts for application in anion exchange membrane water electrolysis Raja Rafidah Raja Sulaiman, Raja Rafidah Raja Sulaiman Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, MalaysiaSearch for more papers by this authorWai Yin Wong, Corresponding Author Wai Yin Wong [email protected] orcid.org/0000-0002-5093-1431 Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia Correspondence Wai Yin Wong, Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia. Email: [email protected]Search for more papers by this authorKee Shyuan Loh, Kee Shyuan Loh Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, MalaysiaSearch for more papers by this author Raja Rafidah Raja Sulaiman, Raja Rafidah Raja Sulaiman Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, MalaysiaSearch for more papers by this authorWai Yin Wong, Corresponding Author Wai Yin Wong [email protected] orcid.org/0000-0002-5093-1431 Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, Malaysia Correspondence Wai Yin Wong, Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia. Email: [email protected]Search for more papers by this authorKee Shyuan Loh, Kee Shyuan Loh Fuel Cell Institute, Universiti Kebangsaan Malaysia, Bangi, MalaysiaSearch for more papers by this author First published: 21 October 2021 https://doi.org/10.1002/er.7380Citations: 3 Funding information: Universiti Kebangsaan Malaysia, Grant/Award Number: DPK-2020-013 Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Summary Anion exchange membrane water electrolyzer (AEMWE) is a promising technology in water electrolysis for the production of green hydrogen. Unlike conventional alkaline water electrolyzers (AWE), AEMWEs utilize mild alkaline conditions and anion exchange membranes as separators and ionic conductors, respectively. However, the largest merit of AEMWE is the utilization of low-cost transition metals as electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Achieving excellent AEMWE performance using highly active and robust transition metal electrocatalysts is desired for lowering the fabrication cost and realizing the successful commercialization of AEMWE. Water splitting efficiency in the AEMWE largely depends on the kinetics of the HER and OER catalysts. Such a condition requires proper understanding of the reaction mechanisms, careful design and optimization of catalyst materials, and maintenance of catalyst durability under AEMWE conditions during long-term operation. This review discussed recent transition metal HER, OER, and bifunctional water splitting electrocatalysts applied within the actual AEMWE membrane electrode assembly (MEA), where their influence toward the electrolyzer cell performance is highlighted. Additionally, the MEA fabrication methods are briefly addressed. From the review, potential electrocatalyst materials and remaining challenges are identified to provide for future improvements on the AEMWE system. CONFLICT OF INTEREST The authors declare no conflicts of interest. Citing Literature Volume46, Issue310 March 2022Pages 2241-2276 RelatedInformation