Events

CCST Seminar: Abhaya Datye

University of New Mexico

 

BIO:

Abhaya Datye has been on the faculty at the University of New Mexico since 1984.  Abhaya received his Ph.D. in chemical engineering from the University of Michigan.  His research group has pioneered the development of electron microscopy tools for the study of catalysts.  Using model catalysts, his group has shown metal/support interfaces can be studied at near atomic resolution, making electron microscopy – a bulk technique – into a very sensitive and local probe of surface structure, which determines catalytic activity.  His current work involves the synthesis of biorenewable chemicals, fundamental studies of catalyst sintering, and synthesis of novel nanostructured heterogeneous catalysts, especially the stabilization of isolated single atoms on supports.  In 2016, the ACS publication Chemical & Engineering News included his research on single atom catalysis as one of the top 10 stories for the year.  His research has been recognized through numerous awards, including John Matthews Lectureship, Microscopy Society of South Africa, 2013, NSF Industry University Cooperative Research Centers, 2008 Award for Excellence, Best paper Materials Science, Microscopy and Microanalysis, 2006, and Outstanding Research Award and Outstanding Teaching Award from the School of Engineering at the University of New Mexico.

 

ABSTRACT:

"Designing Catalysts for Meeting the DOE 150 °C Challenge for Exhaust Emissions"

 

As more efficient combustion engines are developed for transportation, it is expected that less heat will be wasted in the exhaust, leading to lower exhaust temperatures.  Hence DOE has set a goal of achieving 90% conversion of target pollutants by 150 °C [1].  To meet exhaust emission standards, it is necessary to develop catalysts that provide light off at lower temperatures than the current generation of catalysts (which become active at ~200 °C).  The new targets cannot be achieved simply by increasing the loading of noble metals.  One way to achieve higher reactivity at low temperatures is by control of the crystallite size of the platinum group metal (PGM) nanoparticles [2].  Smaller particles and sub-nanometer clusters show higher reactivity, and in the limit, we can envision single atom catalysts, which provide the highest atom efficiency to reduce noble metal usage, since every atom is involved in the catalytic cycle.  The challenge is to make these single atom and sub-nm structures durable so they can survive high temperature aging protocols and demonstrate performance under realistic conditions.  This presentation will highlight our approach to enhance the reactivity and thermal durability of emissions control catalysts using single atom catalysts (SACs) [3,4].

Friday, September 15, 2017 at 10:00am

Colburn Lab, 366 CLB
University of Delaware- Colburn Lab, University of Delaware, 150 Academy St, Newark, DE 19716-3196, USA

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