Hydrogen Spillover on $CeO_2/Pt$: Enhanced Storage of Active Hydrogen

Dutta, Gargi and Waghmare, Umesh V and Baidya, Tinku and Hegde, MS (2007) Hydrogen Spillover on $CeO_2/Pt$: Enhanced Storage of Active Hydrogen. In: Chemistry of Materials, 19 (26). pp. 6430-6436.

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Abstract

We have investigated the concept of hydrogen spillover by a density functional theory (DFT) approach in combination with experimental observations. A H/Pt molar ratio of 5 to 9 is observed over $Ce_{1-x}Pt_xO_{2- \delta}$ catalyst, where Pt is present in the +2 ionic state. The total hydrogen adsorbed over the catalyst is \sim 30 times higher than that over nano-Pt metal particles. NMR study show protonic hydrogen over the catalyst. DFT calculations indeed support the enhanced adsorption of hydrogen on the Pt-ion-doped ceria surface via spillover to the oxide support. Further, the calculations confirm the formation of protonic hydrogen on the catalyst surface in contrast to the formation of hydridic hydrogen on Pt metal.

Item Type:	Journal Article
Publication:	Chemistry of Materials
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	06 Mar 2008
Last Modified:	19 Sep 2010 04:43
URI:	http://eprints.iisc.ac.in/id/eprint/13195

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