Controlled crystal growth orientation and surface charge effects in self-assembled nickel oxide nanoflakes and their activity for the oxygen evolution reaction

The relationship between the surface charge and the morphology of Ni(OH)2/NiO nano-catalysts in terms of Crystal Growth Orientation and exposed Miller surfaces is presented. The surface charge around the point of zero charge during synthesis of the metal hydroxides/oxides is introduced as an important design principle for controlling the nano-catalysts and producing efficient electrocatalysts.275