Several techniques are used for the fabrication of catalysts, including:
1. Sol-Gel Method: This involves the transition of a solution into a solid gel phase. It is useful for creating highly porous materials with large surface areas. 2. Precipitation: A method where soluble precursors are converted into an insoluble product. This technique is common for producing metal oxides. 3. Impregnation: Involves soaking a support material in a solution containing the active catalyst component, followed by drying and calcination. 4. Chemical Vapor Deposition (CVD): Utilizes gaseous reactants to deposit a thin film of catalyst on a substrate. 5. Electrochemical Deposition: A process where electric current is used to reduce metal ions onto a substrate, forming a catalytic layer.