Compositional Tuning and Surface Restructuring Synergistically Enhance Perovskite Ferrite Catalysts for Hydrogen Evolution in a Membrane-Less Electrolyzer

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00009537
URN to cite this document: urn:nbn:de:bvb:703-epub-9537-7

Title data

Bi, Yixin ; Wang, Yuhao ; Wang, Zilong ; Song, Yufei ; Li, Nuotong ; Li, Jingwei ; Kar, Arini ; Chen, Qing ; Ciucci, Francesco:
Compositional Tuning and Surface Restructuring Synergistically Enhance Perovskite Ferrite Catalysts for Hydrogen Evolution in a Membrane-Less Electrolyzer.
In: Advanced Energy Materials. Vol. 16 (2026) Issue 14 . - e05486.
ISSN 1614-6840
DOI der Verlagsversion: https://doi.org/10.1002/aenm.202505486

	Format: PDF Name: Advanced Energy Materials - 2026 - Bi - Compositional Tuning and Surface Restructuring Synergistically Enhance Perovskite.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Abstract

Balancing stability and activity of the hydrogen evolution reaction (HER) electrocatalysis remains challenging for advanced electrolysis technologies. This work introduces a synergistic design strategy to tackle the challenge with in situ surface restructuring. Fe-based double perovskite is developed with an optimal electronic structure for HER catalysis, delivering an overpotential of 325 mV in 0.1 m KOH and 184 mV in 1 m KOH at 10 mA/cm2, among the best reported. Additionally, the catalyst exhibited remarkable self-improving stability, with specific activity increasing 1.98 times at 300 mV overpotential after 20 h, due to the restructuring of an amorphous layer confirmed with transmission electron microscopy. To demonstrate practical utility, the catalyst was integrated into an active flow membraneless electrolyzer (AFME), a promising technology that is currently limited by instability. The device demonstrated outstanding operational stability for 1000 h at 50 mA/cm2, with a minimal decay rate of 0.25 mV/h, establishing a new benchmark for membraneless systems. This work not only presents a powerful strategy for designing self-improving catalysts but also validates its practical efficacy in next generation electrolyzer technologies, paving the way for cost-effective green hydrogen production.

Further data

Item Type:	Article in a journal
DDC Subjects:	600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science > Chair Electrode Design of Electrochemical Energy Storage Systems > Chair Electrode Design of Electrochemical Energy Storage Systems - Univ.-Prof. Dr. Francesco Ciucci Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Electrode Design of Electrochemical Energy Storage Systems Research Institutions Research Institutions > Central research institutes
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-9537-7
Date Deposited:	28 Jul 2026 15:04
Last Modified:	28 Jul 2026 15:05
URI:	https://epub.uni-bayreuth.de/id/eprint/9537

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