Direct Observation of Ion Exchange in Mechanically Activated LiH+MgB2 System Using Ultra-High Field Nuclear Magnetic Resonance Spectroscopy

Journal Article · Mon Apr 06 04:00:00 EDT 2009 · Applied Physics Letters, 94(14):Art No.: 141905

DOI:https://doi.org/10.1063/1.3110966· OSTI ID:958454

Hu, Jian Z; Kwak, Ja Hun; Yang, Zhenguo; Wan, Xiufeng; Shaw, Leonard D

The LiBH4 + MgH2 system has great potential for hydrogen vehicle applications. In this study, the reported solid-state hydrogenation system made of LiH + 1/2MgB2 has been investigated using ultra-high field nuclear magnetic resonance spectroscopy. It is found that Mg-Li ion exchange occurs within MgB2 during ball milling to form a compound of (Mg1-xLi2x)B2 which facilitates the formation of LiBH4 in the subsequent hydriding reaction. This discovery offers a scientific foundation for investigating the detailed mechanisms of solid-state hydrogenation and dehdrogenation of the LiBH4 +MgH2 system in the future.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 958454
• Report Number(s): PNNL-SA-62265; 13499d; EB4202000
• Journal Information: Applied Physics Letters, 94(14):Art No.: 141905, Journal Name: Applied Physics Letters, 94(14):Art No.: 141905 Journal Issue: 14 Vol. 94; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
DEHYDROGENATION
Environmental Molecular Sciences Laboratory
HYDROGEN
HYDROGENATION
ION EXCHANGE
MILLING
NUCLEAR MAGNETIC RESONANCE
SPECTROSCOPY
fuel cell
hydrogen
ion
vehicles