Accelerating electron transfer kinetics is an efficient strategy to tackle sluggish oxygen evolution reaction (OER). Herein, Ni3Fe1-xVx/Ni3Fe1-xVxN heterojunctions were elaborately constructed to demonstrate that the coupling of variable-valence metal doping...
The spin state change of Fe3+ ions induced the paramagnetic Fe0.5Ni0.5OOH shell on the ferromagnetic Cu0.5NFe3Ni0.5 core via superexchange interaction, facilitating charge transfer and oxygen species ad(de)sorption for boosted OER performance.
High-valence Cr ions at the interface between an alloy core and a reconstruction layer shell served as powerful electron acceptors, accelerating the electron transfer by means of the exchange effect of the Ni–O–Cr configuration.
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