Monthly Archives: September 2017

Our groups work on vehicle emissions technology continues with a new DOE NETL grant

We continue to provide theoretical support and guide experimental catalyst design efforts to the team lead by Prof. Mike Harold with a new DOE NETL grant worth $2.1M. UH is joined by Prof. Bill Epling from the University of Virginia (UVA), Oak Ridge National Laboratory (ORNL), the Southwest Research Institute (SwRI) and engineers from Fiat-Chrysler Automobiles Inc. and Johnson Matthey Inc. For more details on our research goals and possible impact on the future personal transportation please read the UH News Release or this article in The Daily Cougar.

JACS Communication on finite size effects on monolayer catalysts

JACS Finite Size Effects
Having been a PhD student in the group of Prof. Manos Mavrikakis at the University of Wisconsin, Madison, Prof. Lars Grabow had an early exposure to monolayer catalysts, or near surface alloys. At the time theory was able to make exciting predictions regarding the catalytic properties of these hypothetical materials, but only a hand-full of experimentalists accepted the challenge to actually make such well-defined structures. One such pioneer was Dr. Radoslav Adzic at Brookhaven National Laboratory and his former postdoctoral researcher, now Associate Professor, Stanko Brankovic. Since then, numerous monolayer catalysts with exceptional activity have been discovered, and their properties can generally be captured as a combination of electronic (or ligand) effects and the epitaxial strain imposed by the host material on the overlayer metal. Years later, Stanko and Lars joined forces to yet discover another crucial aspect relating to monolayer catalysts. In practice, monolayer materials are not perfect. These imperfections lead to an additional strain along the perimeter of 2-D overlayer islands. This additional strain can have a significant effect and explains experimental observations that are in contrast to the established theory. For more details, please read our recently published communication in JACS or the UH College of Engineering news article.