Ceria-Based Heterogeneous Catalyst for Organic Transformation

Abstract

Cerium dioxide (CeO2) sometimes referred to as ceria, is a rare earth metal oxide that is extensively used in a large number of applications. It is a white or pale-yellow powder that conducts electricity well and cannot be dissolved in water. High thermal stability, exceptional chemical stability, a redox (Ce4+/Ce3+) behavior and the capacity to serve as an oxygen storage material are just a few of ceria's special qualities. In addition to being employed in the creation of ceramic materials, fuel cells, and polishing agents, it is also used in other chemical reactions as catalysts, especially those involving oxidation and reduction. Ceria has attracted interest recently for its possible use in catalytic converters, renewable energy sources like solar cells, and hydrogen storage, among other things. It is clear that adding zirconia to ceria stabilizes it and enhances its activity, thermal stability, and oxygen storage capability. in this thesis different composition of ceria-zirconia oxide is synthesized by the hydrothermal method and palladium is loaded by the impregnation method. The properties present in the prepared mixed oxides were detected by using these techniques such as P- XRD, BET, FT-IR, XPS, SEM, EDAX, and TEM. The Mannich reaction was carried out with the finally prepared Catalyst Ce0.75Zr0.35O2 and 1%Pd/Ce0.75Zr0.25O2. Suzuki reaction was carried out with Catalyst 1%Pd/Ce0.65Zr0.25O2, 1%Pd/Ce0.75Zr0.25O2 and 1%Pd/Ce0.85Zr0.15O2. The analysis of these reactions was done by TLC, GC and GC-MS.