Effect of Milling Parameters on the Dehydrogenation Properties of the Mg-Ti-H system

Journal Article · Thu Nov 05 04:00:00 EST 2009 · Journal of Physical Chemistry C, 113(44):19344-19350

DOI:https://doi.org/10.1021/jp907218t· OSTI ID:969604

Choi, Young Joon; Lu, Jun; Sohn, Hong Yong; Fang, Zhigang Zak; Ronnebro, Ewa

Magnesium-based alloys are promising candidates as potential hydrogen storage materials due to their inherent high hydrogen contents. Small particle size which can be achieved by milling, and small amounts of transition-metal compounds as catalysts result in increased hydrogen release/uptake kinetics. In this work, we examined the effects of various milling parameters and TiH2 content on the dehydrogenation properties of the Mg-Ti-H system. The samples were prepared with different amounts of TiH2 using various milling methods and conditions. The activation energy and the enthalpy change of dehydrogenation of the milled samples were determined by Thermogravimetric Analysis (TGA) and Differential Thermal Analyzer (DTA). The results indicated that the activation energy and enthalpy change of MgH2 dehydrogenation were significantly reduced when 9.1 mol % of TiH2 was added to it and the mixture was milled in a dual planet

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 969604
• Report Number(s): PNNL-SA-67551; EB4202000
• Journal Information: Journal of Physical Chemistry C, 113(44):19344-19350, Journal Name: Journal of Physical Chemistry C, 113(44):19344-19350 Journal Issue: 44 Vol. 113; ISSN 1932-7447
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
ACTIVATION ENERGY
ALLOYS
CATALYSTS
DEHYDROGENATION
ENTHALPY
HYDROGEN
HYDROGEN STORAGE
KINETICS
MILLING
MIXTURES
PARTICLE SIZE
PLANETS
THERMAL GRAVIMETRIC ANALYSIS