(a) Schematic illustration of the fabrication process for the self-supported 3D core-shell Cu@NiFe LDH electrocatalysts (RT: room temperature), (b) SEM images of Cu nanowires, (c) TEM image of Cu@NiFe LDH, (d) EDS line scan spectrum of Cu@NiFe LDH, (e) polarization curves of Cu@NiFe LDH measured in 1 M KOH, and (f) chronopotentiometry curves of Cu@NiFe LDH at constant current densities of 10 and 100 mA cm-2
]. Copyright 2018, the Royal Society of Chemistry. (g) Low-magnification FESEM image and (h) elemental mapping images of NiFe2
nanoparticles/NiFe LDH [59
]. Copyright 2018, American Chemical Society. (i) SEM image of NiFe LDH@NiCoP/NF and (inset) high-resolution image of its NiFe LDH@NiCoP nanowires and (j) TEM image and (k) EDS mapping of a specific NiFe LDH@NiCoP nanowire [60
]. Copyright 2018, Wiley-VCH.