Ultrathin 2D nickel zeolitic imidazolate framework nanosheets for electrocatalytic reduction of CO2

Abstract

Ultrathin 2D nickel(II) (Ni²⁺) and imidazole (Im) based zeolitic imidazolate framework Ni(Im)₂ nanosheets are reported as exceptional efficient electrocatalysts for the electrocatalytic CO₂ reduction reaction. Five nanometre thick nanosheets have a higher faradaic efficiency of 78.8% and a surface active site density of 1.68 × 10⁻⁷ mol cm⁻², which is superior to those of thicker nanosheets and bulk Ni(Im)₂.