Gallium nitride catalyzed the direct hydrogenation of carbon dioxide to dimethyl ether as primary product.

ABSTRACT: The selective hydrogenation of CO₂ to value-added chemicals is attractive but still challenged by the high-performance catalyst. In this work, we report that gallium nitride (GaN) catalyzes the direct hydrogenation of CO₂ to dimethyl ether (DME) with a CO-free selectivity of about 80%. The activity of GaN for the hydrogenation of CO₂ is much higher than that for the hydrogenation of CO although the product distribution is very similar. The steady-state and transient experimental results, spectroscopic studies, and density functional theory calculations rigorously reveal that DME is produced as the primary product via the methyl and formate intermediates, which are formed over different planes of GaN with similar activation energies. This essentially differs

SUBMITTER: Liu C 

PROVIDER: S-EPMC8052344 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature