(332e) Atomically-Thin Noble Metal Coatings on Early Transition Metal Carbide Nanoparticles: a Versatile Catalytic Platform for Electro- and Thermocatalysis
AIChE Annual Meeting
2016
2016 AIChE Annual Meeting
Catalysis and Reaction Engineering Division
Award Session in Honor of Prof. Jim Dumesic II
Tuesday, November 15, 2016 - 2:30pm to 3:00pm
Here, new developments in the use of heterometallic early transition metal carbide (TMC) nanoparticles will be described as a novel platform to replace (or at least drastically reduce) noble metal utilization in electro- and thermo-catalytic applications. A new method to synthesize TMCs and core-shell TMC-noble metal structures with exquisite control over composition, size, crystal phase, and purity will be demonstrated. We will show how advanced synthesis techniques can be coupled with rigorous reactivity and characterization studies to uncover unique synergies in nanostructured catalysts. Specifically, we will show that Pt and PtRu monolayers supported on bimetallic titanium tungsten carbide (TiWC) cores are highly CO-tolerant electrocatalysts for hydrogen oxidation and that they achieve an order of magnitude increase in methanol electrooxidation activity over commercial catalysts even after 10,000 cycles with superb resistance to sintering. Collectively, these core-shell catalysts present a novel platform to drastically enhance utilization of noble metals while substantially enhancing their reactivity and stability