Spin regulation on (Co,Ni)Se2/C@FeOOH hollow nanocage accelerates water oxidation

Spin engineering is recognized as a promising strategy that modulates the association between d-orbital electrons and oxygenated species, enhances catalytic kinetics. However, few efforts have been made to clarify whether spin could make considerable enhancement for electrocatalytic water oxidation. Herein, we report of nanocage-structured (Co,Ni)Se2/[email protected], showed significant oxygen evolution reaction (OER) activity. Magnetization measurement presented protected] sample possesses higher polarization number (?b = 6.966 ?B/f.u.) compared with (Co,Ni)Se2/C 6.398 ?B/f.u.), which enlarged favors adsorption desorption energy intermediate confirmed by surface valance band spectra. Consequently, affords remarkable OER product low overpotential 241 mV at current 10 mA cm?2 small Tafel slope 44 dec?1 in 1.0 mol/L KOH alkaline solution, significantly surpassing parent catalyst. This work will trigger solid step design highly-efficient electrocatalysts.