Silica-Supported PdGa Nanoparticles: Metal Synergy for Highly Active and Selective CO₂-to-CH₃OH Hydrogenation.

ABSTRACT: The direct conversion of CO₂ to CH₃OH represents an appealing strategy for the mitigation of anthropogenic CO₂ emissions. Here, we report that small, narrowly distributed alloyed PdGa nanoparticles, prepared via surface organometallic chemistry from silica-supported Ga^III isolated sites, selectively catalyze the hydrogenation of CO₂ to CH₃OH. At 230 °C and 25 bar, high activity (22.3 mol_MeOH mol_Pd ^-1 h^-1) and selectivity for CH₃OH/DME (81%) are observed, while the corresponding silica-supported Pd nanoparticles show low activity and selectivity. X-ray absorption spectroscopy (XAS), IR, NMR, and scanning transmission electron microscopy-energy-dispersive X-ray provide evi

SUBMITTER: Docherty SR 

PROVIDER: S-EPMC8395611 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature