Related Experiment Video
Updated: May 27, 2025

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
Published on: October 5, 2013
Ferromagnetic transformation of α-Fe2O3via Co doping for efficient water oxidation under magnetic field
Hong Wang1, Yuan Dong1, Jie Ying2
1State Key Laboratory of Silicate Materials for Architectures & State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Chemistry, Chemical Engineering and Life Sciences & Laoshan Laboratory & School of Materials Science and Engineering & International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China. xyyang@whut.edu.cn.
Abstract:
The introduction of a magnetic field has great potential for enhancing oxygen evolution reaction (OER) performance, but it requires the catalyst to be ferromagnetic and there is a lack of understanding of the fundamental mechanisms. Herein, we achieved the transformation of non-ferromagnetic α-Fe2O3 into ferromagnetic Co0.14FeO by Co doping. Compared to α-Fe2O3, the OER activity of Co0.14FeO considerably increased under a magnetic field of 3000 Oe and is proportional to the magnetic field strength within a certain range. This can be ascribed to the external magnetic field enhancing the degree of the magnetic moment ordering of Co0.14FeO, which improved electron spin polarization.
Related Concept Videos
Ferromagnetism
Magnetostatic Boundary Conditions
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
Diamagnetism
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Properties of Transition Metals
Paramagnetism

