By varying the content and chemical properties of the porous material such as acidic and basic sites or redox centers, and the nature of the incorporated metal, a multifunctional catalyst suitable for tandem catalysis can be obtained . Immobilization of the metallic particles on porous supports such as porous organic polymers ( ), covalent organic framework , metal-organic frameworks, zeolites , SiO2 , TiO2 , CeO2 and other porous materials is widely used for design of the catalyst for many processes. Such materials exhibit catalytic activity in the CO oxidation ,