Fig. 4From: Morphology controlled synthesis of 2-D Ni–Ni3S2 and Ni3S2 nanostructures on Ni foam towards oxygen evolution reaction a FE-SEM, b TEM, c HR-TEM images and d X-ray diffraction of HC–Ni3S2/NF. e EDS elemental mapping of HC–Ni3S2 scrapped down from the Ni foamBack to article page