October 10, 2019
1:00 PM - 2:00 PM
William Eckhardt Research Center (Rm 201)
Special Seminar Speaker: Massimiliano Delferro, PhD., Argonne National Laboratory
Title of Talk: Catalytic Recycling and Upcycling of Polyofins
Synthetic polymers are ubiquitous and critical to the function of modern life. However, the ubiquity of polymers has resulted in an enormous and growing amount of polymer waste, which has a long lifetime in the environment and is inefficient to recycle. Here, we have discovered Well-dispersed Pt nanoparticles supported on SrTiO3 nanocuboids by atomic layer deposition were shown to be capable of converting PE (8,000 – 158,000 Da) into value-added high-quality liquids (HQLs) by hydrogenolysis at 170 psi H2 and 300 °C under solvent-free conditions. Adsorption of PE on the catalytic surfaces plays a significant role in selective hydrogenolysis, as shown by catalytic, solid-state NMR of adsorbed 13C-enriched PE, and density functional theory. We attribute the formation of uniform low dispersity products to a combination of preferential binding of high molecular weight PE on the catalyst surface and stronger adsorption of PE to Pt than to the SrTiO3 support.