Impregnation can be performed using several techniques, including:
1. Incipient Wetness Impregnation (IWI): Involves adding a solution of the metal precursor to the support material in such a way that the total volume of the solution is equal to the pore volume of the support. 2. Excess Solution Impregnation: Involves soaking the support material in a large volume of the metal precursor solution, followed by drying and sometimes washing to remove excess precursor. 3. Deposition-Precipitation: Involves the co-deposition of the metal precursor and a precipitating agent onto the support, commonly used for highly dispersed catalysts.
