Harnessing magnetic fields to accelerate oxygen evolution reaction

Xiaoning Li; Chongyan Hao; Yumeng Du; Yun Lu; Yameng Fan; Mingyue Wang; Nana Wang; Ruijin Meng; Xiaolin Wang; Zhichuan J. Xu; Zhenxiang Cheng

doi:10.1016/S1872-2067(23)64560-7

Harnessing magnetic fields to accelerate oxygen evolution reaction

Xiaoning Li, Chongyan Hao, Yumeng Du, Yun Lu, Yameng Fan, Mingyue Wang, Nana Wang, Ruijin Meng, Xiaolin Wang, Zhichuan J. Xu^*, Zhenxiang Cheng

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The challenge of overcoming the bottleneck in water electrolysis can potentially be addressed by utilizing permanent magnets without extra energy consumption, but the underlying mechanism of magnetic field effects is still puzzling despite increasing efforts in last few years. In this work, by dip-coating a superhydrophilic γ-Fe₂O₃ layer onto different electrode substrates, their surface wettability and magnetism are modified, so the ever-tangled effects of magnetic field are separated and identified. It is determined that the primary contribution of magnetic fields at the high current density was due to additional Lorentz force and Kelvin force exerted on oxygen gas bubble, with the former being dependent on the external magnetic field's geometry and the latter closely tied to the electrodes’ magnetism. Strategies to maximize effects of magnetic field as well as the overall efficiency of water electrolysis is proposed.

Original language	English
Pages (from-to)	191-199
Number of pages	9
Journal	Chinese Journal of Catalysis
Volume	55
DOIs	https://doi.org/10.1016/S1872-2067(23)64560-7
Publication status	Published - Dec 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences

ASJC Scopus Subject Areas

Catalysis
General Chemistry

Keywords

Gas release
Kelvin force
Lorentz force
Magnetic field
Water splitting

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/S1872-2067(23)64560-7

Cite this

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title = "Harnessing magnetic fields to accelerate oxygen evolution reaction",

abstract = "The challenge of overcoming the bottleneck in water electrolysis can potentially be addressed by utilizing permanent magnets without extra energy consumption, but the underlying mechanism of magnetic field effects is still puzzling despite increasing efforts in last few years. In this work, by dip-coating a superhydrophilic γ-Fe2O3 layer onto different electrode substrates, their surface wettability and magnetism are modified, so the ever-tangled effects of magnetic field are separated and identified. It is determined that the primary contribution of magnetic fields at the high current density was due to additional Lorentz force and Kelvin force exerted on oxygen gas bubble, with the former being dependent on the external magnetic field's geometry and the latter closely tied to the electrodes{\textquoteright} magnetism. Strategies to maximize effects of magnetic field as well as the overall efficiency of water electrolysis is proposed.",

keywords = "Gas release, Kelvin force, Lorentz force, Magnetic field, Water splitting",

author = "Xiaoning Li and Chongyan Hao and Yumeng Du and Yun Lu and Yameng Fan and Mingyue Wang and Nana Wang and Ruijin Meng and Xiaolin Wang and Xu, {Zhichuan J.} and Zhenxiang Cheng",

note = "Publisher Copyright: {\textcopyright} 2023 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences",

year = "2023",

month = dec,

doi = "10.1016/S1872-2067(23)64560-7",

language = "English",

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T1 - Harnessing magnetic fields to accelerate oxygen evolution reaction

AU - Li, Xiaoning

AU - Hao, Chongyan

AU - Du, Yumeng

AU - Lu, Yun

AU - Fan, Yameng

AU - Wang, Mingyue

AU - Wang, Nana

AU - Meng, Ruijin

AU - Wang, Xiaolin

AU - Xu, Zhichuan J.

AU - Cheng, Zhenxiang

PY - 2023/12

Y1 - 2023/12

N2 - The challenge of overcoming the bottleneck in water electrolysis can potentially be addressed by utilizing permanent magnets without extra energy consumption, but the underlying mechanism of magnetic field effects is still puzzling despite increasing efforts in last few years. In this work, by dip-coating a superhydrophilic γ-Fe2O3 layer onto different electrode substrates, their surface wettability and magnetism are modified, so the ever-tangled effects of magnetic field are separated and identified. It is determined that the primary contribution of magnetic fields at the high current density was due to additional Lorentz force and Kelvin force exerted on oxygen gas bubble, with the former being dependent on the external magnetic field's geometry and the latter closely tied to the electrodes’ magnetism. Strategies to maximize effects of magnetic field as well as the overall efficiency of water electrolysis is proposed.

AB - The challenge of overcoming the bottleneck in water electrolysis can potentially be addressed by utilizing permanent magnets without extra energy consumption, but the underlying mechanism of magnetic field effects is still puzzling despite increasing efforts in last few years. In this work, by dip-coating a superhydrophilic γ-Fe2O3 layer onto different electrode substrates, their surface wettability and magnetism are modified, so the ever-tangled effects of magnetic field are separated and identified. It is determined that the primary contribution of magnetic fields at the high current density was due to additional Lorentz force and Kelvin force exerted on oxygen gas bubble, with the former being dependent on the external magnetic field's geometry and the latter closely tied to the electrodes’ magnetism. Strategies to maximize effects of magnetic field as well as the overall efficiency of water electrolysis is proposed.

KW - Gas release

KW - Kelvin force

KW - Lorentz force

KW - Magnetic field

KW - Water splitting

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DO - 10.1016/S1872-2067(23)64560-7

M3 - Article

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SN - 1872-2067

VL - 55

SP - 191

EP - 199

JO - Chinese Journal of Catalysis

JF - Chinese Journal of Catalysis

ER -

Harnessing magnetic fields to accelerate oxygen evolution reaction

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

UN SDGs

Access to Document

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