A density functional theory study of the catalytic role of Ti atoms in reversible hydrogen storage in the complex metal hydride, NaAlH4

Santanu Chaudhuri, James Muckerman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Presence of ∼2-4 % Ti is critical for reversible hydrogenation/ rehydrogenation in NaAlH4. We have investigated the probable catalytic role of Ti in this complex multi-step process. The present part of our study concentrates on the rehydrogenation reaction, i.e., the reverse reaction that forms NaAlU4 from its constituent binary hydrides. First principles calculations using density functional theory (DFT) show that a particular arrangement of Ti atoms on the surface of Al metal promotes the chemisorption of molecular hydrogen. We also present comparisons with existing experimental data (EXAFS and TEM) to support the existence of such an arrangement on the surface.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
Pages8-14
Number of pages7
Volume884
Publication statusPublished - 2005
Event2005 MRS Spring Meeting - San Francisco, CA, United States
Duration: Mar 28 2005Apr 1 2005

Other

Other2005 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period3/28/054/1/05

Fingerprint

Coordination Complexes
Hydrogen storage
Metal complexes
Hydrides
Density functional theory
Atoms
Chemisorption
Hydrogenation
Hydrogen
Metals
Transmission electron microscopy
sodium aluminum hydride

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

A density functional theory study of the catalytic role of Ti atoms in reversible hydrogen storage in the complex metal hydride, NaAlH4. / Chaudhuri, Santanu; Muckerman, James.

Materials Research Society Symposium Proceedings. Vol. 884 2005. p. 8-14.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chaudhuri, S & Muckerman, J 2005, A density functional theory study of the catalytic role of Ti atoms in reversible hydrogen storage in the complex metal hydride, NaAlH4. in Materials Research Society Symposium Proceedings. vol. 884, pp. 8-14, 2005 MRS Spring Meeting, San Francisco, CA, United States, 3/28/05.
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