Fig. 4: Spin-polarized OER.
From: Spin-polarized oxygen evolution reaction under magnetic field
a The projected density of states (PDOS) of CoFe2O4 without and with spin alignment. b The spin density for CoFe2O4 with and without spin alignment. c Schematic of spin-exchange mechanism for OER. The first electron transfer step is promoted by spin polarization through the FM exchange (QSEI), which gives smaller electronic repulsions and makes the adsorbed O species have a fixed spin direction. d The calculated Pourbaix diagram of the (111) surface of CoFe2O4. e The spin-polarization mechanisms in OER with starting from the step of O* + OH− → *OOH + e− step. f The free energy diagram of OER at 1.23 V (vs. RHE)61,62 with and without the spin alignment on the (111) surface of CoFe2O4 toward triplet oxygen production.
