One‐Step Synthesis and Characterization of SiC, Mo₂C, and WC Nanostructures

This review describes a novel approach for the syntheses of various carbides of silicon, tungsten, and molybdenum at a relatively low temperature by using the RAPET (Reactions under Autogenic Pressure at Elevated Temperature) process. The solvent‐, template‐free and straightforward RAPET process was used to synthesize a range of new carbide materials with or without the use of catalysts. The thermolysis of precursor(s) in a closed reactor without using additional reducing gases and the characterization of the obtained high‐surface‐area β‐SiC nanorods, micro‐ or nanosized Mo 2 C spheres and WC nanotubes are the key issues described. The capability of the RAPET process to fabricate nanoparticles, nanorods, and nanotubes of different carbides in a single‐step reaction is also demonstrated. By taking advantage of the achieved highest surface area (563 m 2 /g) of SiC, it was possible to store approximately 2 wt.‐% of H 2 at room temperature and 6 MPa.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)