Low temperature catalytic reduction of NO over porous Pt/ZIF-8

In this work, metallic Pt has been dispersed on as synthesized ZIF-8, and the metal supported catalyst has been explored for NOx reduction. The synthesized materials crystallized in body centered cubic lattice with truncated cubic particle morphology, and the Pt nano-particles were observed in its highly dispersed state over the surface. Due to the high surface area, porosity, and basic imidazolate link ZIF-8 showed very high NO adsorption capability, which was further enhanced due to Pt dispersion on the material. The Pt dispersion on ZIF-8 also exhibited a very low temperature H2 dissociation. The Pt/ZIF-8 showed promising low temperature reduction of NOx with good recyclability and thermal stability compared to other zeolitic catalysts. The low temperature high reactivity has been ascribed to the high dispersion of the Pt nanoparticles and its interaction with the support ZIF-8.