Dehydrogenation from 3d-transition-metal-doped NaAlH4: Prediction of catalysts
2007 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 90, no 14Article in journal (Refereed) Published
A fundamental understanding of the role of catalysts in improving the kinetics and thermodynamics of hydrogen sorption in NaAlH4 is the key for using this material in hydrogen storage. The authors present a systematic theoretical study of energies needed to desorb hydrogen in 3d transition metal (Sc-Cu)-doped NaAlH4. They show that Cr and Fe atoms can be far more effective catalysts than Ti in desorbing hydrogen. The role of the 3d metal atoms in improving the thermodynamics of dehydrogenation is attributed to a significant shortening of the bond length with neighboring Al atoms.
Place, publisher, year, edition, pages
2007. Vol. 90, no 14
hydrogen-storage materials, x-ray-absorption, ti, energy, hydrides
IdentifiersURN: urn:nbn:se:kth:diva-16535DOI: 10.1063/1.2719244ISI: 000245512200023OAI: oai:DiVA.org:kth-16535DiVA: diva2:334577
QC 201005252010-08-052010-08-05Bibliographically approved