One-step topochemical transformation of MoAlB into metastable MoAlB using a metal chloride salt reaction.

Reacting MoAlB with ZnCl at 550 °C produces metastable MoAlB through a one-step topochemical transformation. This reaction showcases differences in reactivity between boride-based MAB phases and carbide-based MAX phases, which are solid-state precursors to an important family of 2-D materials.