fig5

Figure 5. (A) TEM images of Co/CeO₂/Co₂P/CoP@NC heterostructures; (B) HER performance of LSV polarization curves of Co/CeO₂/Co₂P/CoP@NC heterostructures; (C) OER performance of LSV polarization curves. This figure is quoted with permission from Song et al.^[72]; (D) TEM image of MoO₂-CeO_x/NF; (E) LSV curves of MoO₂-CeO_x/NF and Pt/C at 10.0 mA cm^-2 in 0.5 M H₂SO₄; (F) PDOS programs of MoO₂, Vo-MoO₂, CeO_x and Vo-MoO₂-CeO_x. This figure is quoted with permission from Chen et al.^[73]; (G) TEM image of the CeO₂@C₆₀ core-shell hybrid at 200 nm; (H) LSV polarization curves of pure CeO₂/SS, C₆₀/SS and CeO₂@C₆₀/SS core-shell hybrid in 1.0 M KOH; (I) chronoamperometric curves. This figure is quoted with permission from Munawar et al.^[74]. TEM: Transmission electron microscopy HER: hydrogen evolution reaction; LSV: linear sweep voltammetry; OER: oxygen evolution reaction; NF: nickel foam; PDOS: projected density of states.