Unveiling the Dichotomy Between Cobalt(II)-Exchanged X and Y Faujasite Zeolites via Oxidative Carboxylation of Alkene to Cyclic Carbonate

Abstract

Cobalt(II)-exchanged X and Y zeolites with varying metal loadings were employed to convert CO₂ to cyclic carbonates starting from alkenes. The transformation was carried out using O₂ as an oxidant in a mixture of O₂ and CO₂ under atmospheric pressure, and a maximum yield of 35.7% cyclic carbonate was achieved. Studies revealed a stark difference among both the zeolites, primarily arising from a difference in their ion exchange behaviors. Their catalytic and recyclability properties differed as a result of this variation.