Investigating the decomposition pathways and hydrogen storage capacity of V, Cr, and Fe amino borohydrides
- PDF / 881,881 Bytes
- 7 Pages / 612 x 792 pts (letter) Page_size
- 97 Downloads / 212 Views
Advances:
Email alerts: Click here Subscriptions: Click here Commercial reprints: Click here Terms of use : Click here
Investigating the decomposition pathways and hydrogen storage capacity of V, Cr, and Fe amino borohydrides Zachary J. Huba, Matilde Portnoy, Kristen A. Colwell and Albert E. Epshteyn MRS Advances / FirstView Article / July 2016, pp 1 - 6 DOI: 10.1557/adv.2016.394, Published online: 23 May 2016
Link to this article: http://journals.cambridge.org/abstract_S2059852116003947 How to cite this article: Zachary J. Huba, Matilde Portnoy, Kristen A. Colwell and Albert E. Epshteyn Investigating the decomposition pathways and hydrogen storage capacity of V, Cr, and Fe amino borohydrides. MRS Advances, Available on CJO 2016 doi:10.1557/ adv.2016.394 Request Permissions : Click here
Downloaded from http://journals.cambridge.org/ADV, IP address: 128.210.126.199 on 07 Jul 2016
MRS Advances © 2016 Materials Research Society DOI: 10.1557/adv.2016.394
Investigating the decomposition pathways and hydrogen storage capacity of V, Cr, and Fe amino borohydrides Zachary J. Huba1, Matilde Portnoy2, Kristen A. Colwell3, Albert E. Epshteyn4 1
NRC Postdoctoral Associate, Chemistry Division, US Naval Research Laboratory, Washington,
DC 20375 2
HBCU Summer Student, Chemistry Division, US Naval Research Laboratory, Washington, DC
3
NREIP Summer Student, Chemistry Division, US Naval Research Laboratory, Washington, DC
4
Chemistry Division, US Naval Research Laboratory, Washington DC 20375
ABSTRACT Cr, V, and Fe amino borohydride complexes were synthesized using a solution based approach. Thermogravimetric Analysis with simultaneous Differential Scanning Calorimetry was used to investigate their decomposition behavior. The synthesized Cr and Fe complexes exhibited significant hydrogen release around 100 °C. The synthesized V complex showed a large mass loss at temperatures between 50 °C and 100 °C and release of amine byproducts. FTIR of decomposed intermediates showed the decomposition of Cr amino borohydride occurs through the simultaneous loss of hydrogen from both the borohydride and amino ligands, while the Fe complex displays preferential dehydrogenation of the borohydride over the amino ligand. The decomposed products take on a BN type structure when heated to 400 °C.
INTRODUCTION Mobile platforms powered by hydrogen in a future Hydrogen Economy will require technology enabling the storage of hydrogen with high gravimetric and volumetric densities.1, 2 Metal borohydrides (M(BH4)n; (M=metal, n=oxidation state of metal)) are coveted as a hydrogen storage material with high storage capacity.3 However, 1st row transition metal borohydrides are commonly unstable at room temperature making them difficult to synthesize and handle.4 We investigate whether the addition of an amino ligand could serve to increase hydrogen loading, while stabilizing the metal borohydride to give a more controlled release of H2. In this work, transition metal amino borohydrides (Cr, Fe, and V) are synthesized and the characteristics of t
Data Loading...
