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

Louise Jalowiecki-Duhamel (1) , Sylvanie Debeusscher (1) , Hervé Jobic (2) , Edmond Payen (1)

1 UCCS - Unité de Catalyse et Chimie du Solide - UMR 8181
2 IRCELYON - Institut de recherches sur la catalyse et l'environnement de Lyon

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 and the presence of Al allows increasing hydrogen storage and giving a better stability to the system, in particular, with temperature. Neutron spectroscopy evidences in the solids studied the coexistence of different hydrogen species that can be related 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.

Mots clés: Hydrogen storage; hydride; mixed oxides; nickel oxide; INS

Domaines: Catalyse

Louise Jalowiecki-Duhamel, Sylvanie Debeusscher, Hervé Jobic, Edmond Payen. Hydrogen species in CeNi1OY and CeAl0.5Ni1OY mixed oxides catalytic hydrogen reservoirs. Procceedings Hydrogen Economy and Hydrogen Treatment of Materials, Fifth International Conference HTM-2007, 2007, 2, pp.524-530. ⟨hal-00182490⟩