Strategic Cation Exchange Induced 2D Nickel Sulphide Nanoplates with Enhanced Oxygen Evolution Reaction Performance

A cation exchange method enables the synthesis of highly crystalline 2D Ni x S nanoplates with fine-tuned morphology. These nanoplates exhibit excellent OER performance, achieving a 329 mV overpotential at 10 mA cm −2 and a 52 mV dec −1 Tafel slope.