Abstract: A method for synthesizing two-dimensional MXenes from MAX phase materials is disclosed, utilizing a supercritical fluid process. The method involves preparing a liquid medium containing a MAX phase material and one or more halogenating agents, sealing the liquid medium within a supercritical vessel, and etching the MAX phase material by introducing a fluid and adjusting the vessel's interior conditions to achieve a supercritical state. This process allows for the conversion of MAX phase materials into MXenes without generating hydrofluoric acid (HF) in situ.