One-Step Synthesis of Metastable Mo<sub>2</sub>AlB<sub>2</sub> from MoAlB Using Gaseous HCl
Türker Yilmaz, Ozden Gunes Yildiz, Naeimeh Sadat Peighambardoust, Michael Baitinger, Umut Aydemir
Abstract
High Resolution Image Download MS PowerPoint Slide Recent studies increasingly highlight the potential applications of MBenes, a novel class of two-dimensional (2D) materials, yet their production remains challenging. In this context, microcrystalline Mo 2 AlB 2 (space group Cmmm; a = 3.080(3) Å, b = 11.57(1) Å, and c = 3.149(4) Å), a promising precursor for MoB MBene production, was synthesized in a single-step gas–solid reaction at 450 °C using MoAlB and gaseous HCl. This preparation method, previously utilized for the oxidation of Zintl phases, has been successfully adapted to compounds containing d -block elements, providing a new alternative for exfoliating layered materials in liquid solutions. Scanning electron microscopy analysis revealed homogeneous products with microcrystals exhibiting a nonuniform particle size distribution. At higher temperatures, these evolved into plate-like crystallites with smooth surfaces and etch cavities. This efficient and cost-effective gas–solid reaction shows great potential for large-scale production of a wide range of 2D materials, with significant benefits for catalysis, energy storage, and other applications.