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Title: The origin of magnetization-caused increment in water oxidation
Authors: Ren, Xiao
Wu, Tianze
Gong, Zizhao
Pan, Lulu
Meng, Jianling
Yang, Haitao
Dagbjartsdottir, Freyja Bjork
Fisher, Adrian
Gao, Hong-Jun
Xu, Jason Zhichuan
Keywords: Engineering::Materials
Issue Date: 2023
Source: Ren, X., Wu, T., Gong, Z., Pan, L., Meng, J., Yang, H., Dagbjartsdottir, F. B., Fisher, A., Gao, H. & Xu, J. Z. (2023). The origin of magnetization-caused increment in water oxidation. Nature Communications, 14(1), 2482-.
Project: MOE-T2EP10220-0001 
Journal: Nature Communications 
Abstract: Magnetization promoted activity of magnetic catalysts towards the oxygen evolution reaction (OER) has attracted great attention, but remains a puzzle where the increment comes from. Magnetization of a ferromagnetic material only changes its magnetic domain structure. It does not directly change the spin orientation of unpaired electrons in the material. The confusion is that each magnetic domain is a small magnet and theoretically the spin-polarization promoted OER already occurs on these magnetic domains, and thus the enhancement should have been achieved without magnetization. Here, we demonstrate that the enhancement comes from the disappeared domain wall upon magnetization. Magnetization leads to the evolution of the magnetic domain structure, from a multi-domain one to a single domain one, in which the domain wall disappears. The surface occupied by the domain wall is reformatted into one by a single domain, on which the OER follows the spin-facilitated pathways and thus the overall increment on the electrode occurs. This study fills the missing gap for understanding the spin-polarized OER and it further explains the type of ferromagnetic catalysts which can give increment by magnetization.
ISSN: 2041-1723
DOI: 10.1038/s41467-023-38212-2
Schools: School of Materials Science and Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © The Author(s) 2023. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles
MSE Journal Articles

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