A dual-functional catalyst for selective dicarbamate synthesis oxidative carbonylation: enhanced methoxylation for suppressing urea polymer formation

High-yield dicarbamate synthesis via oxidative carbonylation has been challenging due to substantial urea polymer formation. A Pd/CeO 2 catalyst was successfully synthesized dicarbamates while suppressing urea polymer formation. The superior methoxylation reactivity of Pd/CeO 2 , which originated from Pd-CeO 2 synergism, facilitated the conversion of the urea species, thereby preventing urea accumulation. The balance between carbonylation and methoxylation rates is pivotal in dicarbamate synthesis via oxidative carbonylation. The superior methoxylation reactivity of Pd/CeO 2 prevents urea accumulation, thereby achieving a high yield of dicarbamates.