One-step synthesis of cubic pyrite-type CoSe2 at low temperature for efficient hydrogen evolution reaction

Abstract

Cubic pyrite-type CoSe₂ was synthesized by a one-step method, via the reaction between drop casted CoCl₂ and Se vapour. The as-grown CoSe₂ nanoparticles exhibited high activity toward hydrogen evolution reaction with a low Tafel slope of ∼40 mV per decade, accompanied by a large current density and excellent durability.