Uncovering the Role of Intrinsic Magnetic Order in Oxygen Evolution Reaction Activity With Operando Spectroscopy
(2026) In Advanced Energy Materials- Abstract
Understanding the role of intrinsic magnetic order on the oxygen evolution reaction (OER) requires careful consideration of the magnetic properties of both the catalytic surface and bulk under operating conditions. Because these often diverge from those of the pristine material, operando characterization that directly links magnetic behavior to catalytic activity is essential. Here, we investigate the magnetic properties of (Formula presented.) (Formula presented.) (Formula presented.) thin-film OER catalysts using a combination of temperature-dependent operando ferromagnetic resonance spectroscopy (FMR), ambient-pressure X-ray magnetic circular dichroism (XMCD), and operando X-ray absorption spectroscopy (XAS). A direct correlation... (More)
Understanding the role of intrinsic magnetic order on the oxygen evolution reaction (OER) requires careful consideration of the magnetic properties of both the catalytic surface and bulk under operating conditions. Because these often diverge from those of the pristine material, operando characterization that directly links magnetic behavior to catalytic activity is essential. Here, we investigate the magnetic properties of (Formula presented.) (Formula presented.) (Formula presented.) thin-film OER catalysts using a combination of temperature-dependent operando ferromagnetic resonance spectroscopy (FMR), ambient-pressure X-ray magnetic circular dichroism (XMCD), and operando X-ray absorption spectroscopy (XAS). A direct correlation between changes in long-range magnetic order and OER activity, with minimal changes in the catalyst's electronic state was observed. Non-interacting ferromagnetic regions appear to contribute to enhanced activity at temperatures just above (Formula presented.). The enhancement is further amplified when the thin film undergoes the bulk paramagnetic-to-ferromagnetic transition below (Formula presented.). Our results suggest that interatomic spin-exchange interactions, occurring within ferromagnetic regions and across the ferromagnetic bulk and between these atoms and adsorbates, dominate the observed OER enhancements, potentially augmented by short-range spin-polarized conduction effects. These findings highlight that local ferromagnetic order, governed by exchange interactions over a few unit-cells, plays a crucial role in modulating surface reaction dynamics, offering mechanistic insight into spin-dependent catalysis.
(Less)
- author
- van der Minne, Emma ; Mauri, Silvia LU ; Vereshchagin, Anatoliy A. ; Ratovskii, Vadim ; Kiens, Ellen M. ; Sharma, Hemanita ; Behrends, Jan ; Torelli, Piero ; Koster, Gertjan and Baeumer, Christoph
- organization
- publishing date
- 2026
- type
- Contribution to journal
- publication status
- in press
- subject
- keywords
- epitaxial model catalysts, ferromagnetic catalysts, intrinsic long-range ferromagnetic order, operando characterization, spin-dependent oer
- in
- Advanced Energy Materials
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:105034996507
- ISSN
- 1614-6832
- DOI
- 10.1002/aenm.202506663
- language
- English
- LU publication?
- yes
- id
- c2e21806-d23c-4f61-b417-1fea3faaf55a
- date added to LUP
- 2026-06-11 12:57:01
- date last changed
- 2026-06-11 12:57:42
@article{c2e21806-d23c-4f61-b417-1fea3faaf55a,
abstract = {{<p>Understanding the role of intrinsic magnetic order on the oxygen evolution reaction (OER) requires careful consideration of the magnetic properties of both the catalytic surface and bulk under operating conditions. Because these often diverge from those of the pristine material, operando characterization that directly links magnetic behavior to catalytic activity is essential. Here, we investigate the magnetic properties of (Formula presented.) (Formula presented.) (Formula presented.) thin-film OER catalysts using a combination of temperature-dependent operando ferromagnetic resonance spectroscopy (FMR), ambient-pressure X-ray magnetic circular dichroism (XMCD), and operando X-ray absorption spectroscopy (XAS). A direct correlation between changes in long-range magnetic order and OER activity, with minimal changes in the catalyst's electronic state was observed. Non-interacting ferromagnetic regions appear to contribute to enhanced activity at temperatures just above (Formula presented.). The enhancement is further amplified when the thin film undergoes the bulk paramagnetic-to-ferromagnetic transition below (Formula presented.). Our results suggest that interatomic spin-exchange interactions, occurring within ferromagnetic regions and across the ferromagnetic bulk and between these atoms and adsorbates, dominate the observed OER enhancements, potentially augmented by short-range spin-polarized conduction effects. These findings highlight that local ferromagnetic order, governed by exchange interactions over a few unit-cells, plays a crucial role in modulating surface reaction dynamics, offering mechanistic insight into spin-dependent catalysis.</p>}},
author = {{van der Minne, Emma and Mauri, Silvia and Vereshchagin, Anatoliy A. and Ratovskii, Vadim and Kiens, Ellen M. and Sharma, Hemanita and Behrends, Jan and Torelli, Piero and Koster, Gertjan and Baeumer, Christoph}},
issn = {{1614-6832}},
keywords = {{epitaxial model catalysts; ferromagnetic catalysts; intrinsic long-range ferromagnetic order; operando characterization; spin-dependent oer}},
language = {{eng}},
publisher = {{Wiley-Blackwell}},
series = {{Advanced Energy Materials}},
title = {{Uncovering the Role of Intrinsic Magnetic Order in Oxygen Evolution Reaction Activity With Operando Spectroscopy}},
url = {{http://dx.doi.org/10.1002/aenm.202506663}},
doi = {{10.1002/aenm.202506663}},
year = {{2026}},
}