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Article 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-FeO into ferromagnetic CoFeO by Co doping. Compared to α-FeO, the OER activity of CoFeO 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 CoFeO, which improved electron spin polarization.
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