A method for producing catalyst particles is disclosed. The method comprises: forming a solution comprising a solvent and a material including catalyst material, wherein the material including catalyst material is dissolved or emulsified in the solvent; aerosolizing the formed solution to produce droplets comprising the material including catalyst material; and treating the droplets to produce catalyst particles or intermediate catalyst particles from the material including catalyst material comprised in the droplets. A method for producing nanomaterials, an apparatus,a catalyst particle and a solution droplet for the production of a catalyst particle are also disclosed.