New attempt for CO2 utilization: One-pot catalytic syntheses of methyl, ethyl and n-butyl carbamates

The direct production of methyl, ethyl and n-butyl carbamates (MC, EC and BC) from NH3, CO2 and alcohols could efficiently be catalyzed by V2O5, and ca. 11–25% yields with 98% selectivity for alkyl carbamates could be obtained. The catalyst could be recycled six times without obvious decrease in catalytic activity. XRD and XPS analysis showed that in-situ produced (NH4)2V3O8 was the catalytically active species.

Graphical abstractThe direct production of alkyl carbamates from NH3, CO2 and alcohols was catalyzed over V2O5 catalyst, the in-situ produced (NH4)2V3O8 was proven the catalytically active species for this reaction.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► The one-pot production of alkyl carbamates from NH3, CO2 and alcohols was carried out over commercially available V2O5 catalyst. ► XRD and XPS measurements proved that In-situ produced (NH4)2V3O8 was the catalytically active species for this reaction. ► About 11-25% yields with 98% selectivity for alkyl carbamates could be obtained.