Hydrogen spillover on ruthenium-decorated carbon based substrates

Hydrogen spillover refers to a net weak chemisorption process whereby the dissociation of hydrogen occurs at active metal catalyst sites. Subsequently the diffusion of surface hydrogen species occurs to other sites on the substrate where no dissociative hydrogen adsorption has occurred. Specifically in our studies we have developed several new processing techniques for the deposition of the metal catalyst particles onto high surface area carbon substrates. (>3000m2/g. While the phenomenon of hydrogen spillover has been demonstrated experimentally, there still exist doubt as to whether or not the spillover hydrogen process can reach the kinetic, volumetric and gravimetric requirements for transportation hydrogen storage applications. Our presentation will outline the recent results of hydrogen capacity on a series of ruthenium decorated activated carbon, pyrolyzed PEEK, carbon aerogel and b-doped carbon materials. The specifics of the synthetic techniques, characterization of materials and hydrogen sorption kinetics will be discussed.