Fig. 2
From: Partially amorphous iron-copper-nickel sulfides for robust bifunctional electrocatalysis
(a, c, e) are scanning electron microscopic images of image of Fe1.4 Cu1.2 Ni0.4 S, Fe0.4 Cu1.2 Ni1.4 S and Fe1.4 Cu0.4 Ni1.2 S, indicating the flake like, uniform distribution of metals in electrocatalysts, scale bar is equal to 10 μm (b, d, f) represents the elemental mapping of elements in respective electrocatalysts.
