One-pot synthesis of cobalt-rhenium nanoparticles taking the unusual β-Mn type structure.

Using a facile one-pot colloidal method, it is now possible to obtain monodisperse Co 1- x Re x nanoparticles (NPs), with excellent control of Re stoichiometry for x < 0.15. Re-incorporation in terms of a solid solution stabilizes the β-Mn polymorph relative to the hcp/ccp variants of cobalt. The NPs are thermally stable up to 300 °C, which may make them attractive as model catalysts.