Absence of the structural phase transition in ammonia borane dispersed in mesoporous silica: evidence of novel thermodynamic properties

Journal Article · Thu Jun 18 04:00:00 EDT 2009 · Journal of Physical Chemistry C, 113(24):10319-10321

DOI:https://doi.org/10.1021/jp902341s· OSTI ID:963184

Paolone, Annalisa; Palumbo, Oriele; Rispoli, Pasquale; Cantelli, Rosario; Autrey, Thomas; Karkamkar, Abhijeet J

The occurrence of the structural phase transition of NH3BH3 dispersed in mesoporous silica was studied by anelastic spectroscopy and differential scanning calorimetry. Both measurements indicate that the structural phase transition is suppressed in the sample in which ammonia borane covers only the internal surface of the scaffold. Such a drastic change in the main features of this compound indicates that novel thermodynamic properties can be obtained by means of the fine dispersion of NH3BH3 at a monolayer level. This work was produced with the support of the US Department of Energy Office of Basic Energy Sciences, Chemical Sciences Division. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 963184
• Report Number(s): PNNL-SA-65668; KC0302010
• Journal Information: Journal of Physical Chemistry C, 113(24):10319-10321, Journal Name: Journal of Physical Chemistry C, 113(24):10319-10321 Journal Issue: 24 Vol. 113; ISSN 1932-7447
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AMMONIA
Ammonia borane
BORANES
PHASE TRANSFORMATIONS
SILICA
THERMODYNAMIC PROPERTIES
anelastic spectroscopy
differential scanning calorimetry
nanophase structure
nanoscaffolds
structural phase transition