The origin of magnetization-caused increment in water oxidation.

Abstract in brief

• Magnetization of ferromagnetic catalysts enhances water oxidation (OER) by transforming the magnetic domain structure from multiple domains with domain walls into a single domain, eliminating the domain walls.
• The disappearance of domain walls creates new surface areas that facilitate spin-aligned pathways for OER, leading to increased activity, even though magnetization itself does not directly change the spin orientation of electrons.
• This research clarifies the mechanism behind magnetization-induced activity improvement, showing that the key factor is the domain wall elimination and reformation into a single domain, which supports more efficient spin-facilitated reactions.]