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Magnetic-Field-Induced
Large OER Enhancement in Co-Based
Ferrimagnetic Thin Films
Li Liu (75607)
Ziang Meng (17719101)
Guojian Zhao (17719104)
Zhiyuan Duan (4026173)
Jingyu Li (324429)
Sixu Jiang (14367765)
Xiaoyang Tan (22825965)
Shiheng Bu (25139846)
Chen Liang (196452)
Xiaoning Wang (16150)
Peixin Qin (8740242)
Zhiqi Liu (386496)
Biochemistry
Physical Sciences not elsewhere classified
Cell Biology
Molecular Biology
Evolutionary Biology
Cancer
Hematology
Infectious Diseases
sustainable hydrogen production
selection constraints associated
remains kinetically sluggish
onset potential decreases
may influence interactions
magnetically regulated electrocatalysts
∼ 96 mv
oxygen evolution reaction
co active sites
strong pma contribute
enhanced oer activity
continuous field application
co magnetic state
∼ 15
state regulation
oxygen intermediates
transfer resistance
tafel slope
strongly correlated
reduced charge
promising route
oer kinetics
new perspective
mediated 3
largely retained
findings provide
field removal
>– 4
Electrochemical water splitting offers a promising route
to sustainable
hydrogen production, yet the oxygen evolution reaction (OER) remains
kinetically sluggish and subject to spin-selection constraints associated
with triplet O<sub>2</sub>. Here, CoTb ferrimagnetic thin films with
strong perpendicular magnetic anisotropy (PMA) are used to investigate
the relationship between magnetic ordering and OER kinetics. Under
a 300 mT magnetic field, the onset potential decreases by ∼96
mV and the Tafel slope by ∼15.1 mV·dec<sup>–1</sup>, accompanied by reduced charge-transfer resistance. The enhanced
OER activity is strongly correlated with magnetic-state regulation
and largely retained after field removal. Tb-mediated 3<i>d</i>–4<i>f</i> exchange and strong PMA contribute to
regulating and retaining the Co magnetic state, which may influence
interactions between Co active sites and oxygen intermediates. This
nonvolatile magnetic state may eliminate the need for continuous field
application, potentially reducing energy consumption. These findings
provide a new perspective for magnetically regulated electrocatalysts.
2026-09-29T00:00:00Z
Text
Journal contribution
10.1021/acs.nanolett.6c03575.s001
https://figshare.com/articles/journal_contribution/Magnetic-Field-Induced_Large_OER_Enhancement_in_Co-Based_Ferrimagnetic_Thin_Films/34028615
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