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Zn-MOF assisted dehydrogenation of ammonia borane: Enhanced kinetics and clean hydrogen generation

Gadipelli, S; Ford, J; Zhou, W; Yildirim, T; (2012) Zn-MOF assisted dehydrogenation of ammonia borane: Enhanced kinetics and clean hydrogen generation. International Journal of Hydrogen Energy , 37 (4) pp. 3633-3638. 10.1016/j.ijhydene.2011.04.008.

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Abstract

We report controllable and enhanced hydrogen release kinetics at reduced temperatures in ammonia borane (AB) catalyzed by Zn-MOF-74. AB is loaded into the unsaturated Zn-metal coordinated one-dimensional hexagonal open nanopores of MOF-74 (ABMOF) via solution infiltration. The ABMOF system provides clean hydrogen by suppressing the release of detrimental volatile byproducts such as ammonia, borazine and diborane. These byproducts prevent the direct use of AB as a hydrogen source for polymer electrolyte membrane fuel cell applications. The H2 release temperature, kinetics, and byproduct generation are dependent on the amount of AB loading. We show that nanoconfinement of AB and its interaction with the active Zn-metal centers in MOF are important in promoting efficient and clean hydrogen generation.

Type: Article
Title: Zn-MOF assisted dehydrogenation of ammonia borane: Enhanced kinetics and clean hydrogen generation
DOI: 10.1016/j.ijhydene.2011.04.008
Publisher version: http://doi.org/10.1016/j.ijhydene.2011.04.008
Language: English
Keywords: Ammonia borane, Metal-organic framework, Nanoconfinement, Dehydrogenation kinetics, Hydrogen storage
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/1544321
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