 magnetization of ferromagnetic materials can increase the efficiency of the oxygen-evolution reaction, OER. However, this effect was previously thought to be caused by the spin-polarized nature of the ferromagnetic material, as opposed to the direct influence of the magnetization itself. In this study, researchers demonstrated that the increased efficiency of the OER is due to the removal of domain walls when the material is magnetized, allowing for more efficient transport of charge carriers along the surface of the material. This finding provides insight into how ferromagnetic materials can be used to improve the efficiency of the OER, and could lead to new applications in energy storage and conversion. This article was authored by C.R.R.N., Tien Tzu-Wu, Tzu-Xiao Gong, and others.