464996 Polymer-Nanocrystal Composites As Tailorable CO2 Hydrogenation Catalysts
The future of humankind is tied to our collective use of energy. Hydrocarbons are a proven energy vector and account for the bulk of our energy infrastructure and feedstocks to the chemical industry. Combustion of fossil based hydrocarbons is unsustainable given finite reserves and the concomitant release of greenhouse gases. Hydrogenation of waste CO2 back in to useful fuels and feedstocks provides a pathway to use fossil resources in a sustainable way. The emerging technologies of photo and electrochemical hydrogen generation can provide the hydrogen needed for CO2 hydrogenation renewably. However, a main issue is still in finding CO2 hydrogenation catalysts that work at low temperature and that are selective towards desirable compounds such as methanol.
In this study, we introduce a framework with which an effective CO2 hydrogenation catalyst may be designed. Microporous polymers provide a tunable chemical environment into which monodisperse Palladium nanocrystal catalysts are incorporated. The synergy of the confinement effect of these frameworks with well-defined metal nanoparticles affording highly active hydrogenation sites provides a platform for catalyst study and optimization under conditions outside the range of standard inorganic supports. Combining gas sorption and catalytic data provides insights into the potential that organic supports have for carbon dioxide hydrogenation.