Si-Substituted MAX Phases and In-Situ Formation of Si-Coated MXene Composites via Chlorosilane Etching

Abstract

A top-down strategy enables the synthesis of Si-substituted MAX phases (Mn+1SiXn, where M = Ti, V, Nb, Ta, Cr and X = C or N ) from Al-based MAX precursors and SiCl4 vapor, allowing precise control over the introduction of A-site vacancies. The method concurrently produces Si-coated MXene composites, offering new avenues for designing advanced materials for energy storage and catalysis applications.