A wafer-scale 1 nm Ni(OH) 2 nanosheet with superior electrocatalytic activity for the oxygen evolution reaction

nanosheet was more than 2 orders of magnitude higher than those of typical OER catalysts. The capability of producing wafer-scale nanometer-thick nanosheets offers a promising strategy to improve the mass efficiency of electrochemical catalysts, which is particularly valuable for preserving rare and precious catalyst materials.