Research
In the Environmental Catalysis Lab, we focus on understanding reaction mechanisms on and along a catalyst surface. Our research spans fundamental understanding of catalytic surfaces (reaction mechanism development and kinetics) to thinking about application (degradation studies and more realistic reaction conditions). Using this knowledge, our goal is to design better catalysts, both at the active site scale, and at the reactor scale, through tailor-designing catalyst active sites and active site densities. Our main research directions include:
Understanding reaction mechanisms, with emphasis on complex feed conditions
Understanding how catalysts change with time on stream and with exposure to known catalyst poisons or degradation modes
Understanding how periodic changes in reaction conditions change the catalyst surface and therefore reaction rates
Designing catalysts from the atomic to reactor scale
Current projects in our lab include
the interconversion of Rh single atoms and Rh particles during CO oxidation and NO reduction reactions,
the rates of ceria and ceria/zirconia reduction and oxidation and how they interact with sulfur,
sulfur poisoning of SCR catalysts,
using periodic reactor operation to enhance methane conversion yields and acrylonitrile production via the ammoxidation of propylene reaction and
resolving how N2O forms over precious metal surfaces.