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Cheng-Yu Wang presents at AMR

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Cheng-Yu Wang successfully presented a poster at the Annual Merit Review in Washington DC on May 15.  Congratulations on a successful presentation Cheng Yu!

Lueking seminar at University of Crete

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Abstract: Hydrogen spillover involves addition of a catalyst to a high-surface area microporous support, such that the catalyst acts as a source for atomic hydrogen, the atomic hydrogen diffuses from the catalyst to the support, and ideally, the support provides a high number of tailored surface binding sites to maximize the number of atomic hydrogens interacting with the surface.  Hydrogen spillover has been proposed as a means to increase the operative adsorption temperature of nanoporous materials from cryogenic conditions to near ambient temperature.  However, this proposition has become highly controversial in the past few years, due largely to discrepancies between laboratories, and even variations of the magnitude of hydrogen uptake observed for materials prepared with near-identical techniques within the same laboratory.  These discrepancies have pointed to the fact that the hydrogen spillover mechanism is not understood on a molecular level.  Amidst this controversy, a combined approach of in situ spectroscopic techniques and theoretical multi-scale modelling calculations are being used to resolve the hydrogen spillover mechanism and illuminate the nature of the exact surface sites and structures responsible for the high uptake in select materials. The first direct spectroscopic evidence of a reversible room temperature carbon-hydrogen wag mode, and how this experimental data was used to modify model chemistry in density functional calculations, will be discussed. The ultimate goal of this project is to not only resolve the hydrogen spillover controversy, but to use the findings to design new materials for hydrogen storage and catalytic hydrogenation.

And just for fun.... I included the following picture of my non-research activities in Crete.View image

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