Title: Hydrogen species in CeNi1OY and CeAl0.5Ni1OY mixed oxides' catalytic hydrogen reservoirs

Authors: L. Jalowiecki-Duhamel, S. Debeusscher, H. Jobic, E. Payen

Addresses: UCCS Unite de Catalyse et de Chimie du Solide, UMR CNRS 8181, Bat. C3, Universite des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France. ' UCCS Unite de Catalyse et de Chimie du Solide, UMR CNRS 8181, Bat. C3, Universite des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France. ' IRCELYON, Institut de Recherche sur la Catalyse et l'Environnement de Lyon, 2 avenue Albert Einstein, 69626 Villeurbanne Cedex, France. ' UCCS Unite de Catalyse et de Chimie du Solide, UMR CNRS 8181, Bat. C3, Universite des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France

Abstract: The interaction of hydrogen with cerium nickel and aluminium-based mixed oxides (CeNi1OY and CeAl0.5Ni1OY) has been studied by catalytic hydrogenation and Inelastic Neutron Scattering (INS). The mixed oxides are large catalytic hydrogen reservoirs called oxyhydrides and the presence of Al allows increasing hydrogen storage and giving the system better stability, in particular, with increasing temperature. Neutron spectroscopy of the solids studied indicates the coexistence of different hydrogen species that can be assigned to hydride species, hydrogen species in interaction with metallic nickel, as well as hydrogen species from hydroxyl groups. The mobility and reactivity of these hydrogen species have been analysed and discussed.

Keywords: hydrogen storage; oxyhydrides; anionic vacancies; ceria; nickel oxide; hydrogen reservoirs; aluminium; hydrogen species.

DOI: 10.1504/IJNHPA.2009.024777

International Journal of Nuclear Hydrogen Production and Applications, 2009 Vol.2 No.2, pp.148 - 158

Available online: 30 Apr 2009 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article