Flash-Joule heating enables rapid solid-state synthesis of multinary chalcogenides: a case study on Cu2Mo6S8

Abstract

Achieving rapid, energy-efficient, and scalable synthesis of multinary chalcogenides remains challenging. Here, we demonstrate Flash-Joule Heating (FJH) for the ultrafast synthesis of the model Chevrel phase, Cu₂Mo₆S₈. Step-heating offers controlled and phase-pure synthesis, while flash-heating enables sub-second reaction timescales at temperatures >2000 °C, highlighting complementary routes toward faster and more sustainable solid-state synthesis.