期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 115, 期 5, 页码 1757-1766出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp1100768
关键词
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资金
- The University, State and Commonwealth Governments
- Australian Research Council [DP0877155, R00107962 2001, ARC LIEF LE0989180]
- Australian Research Council [DP0877155] Funding Source: Australian Research Council
Magnesium hydride nanoparticles were synthesized within a carbon aerogel (CA) scaffold using a dibutylmagnesium precursor. The synthesis reaction was tracked using small-angle X-ray scattering (SAXS) to analyze the structural evolution during MgH2 formation. The CA/MgH2 composite was also investigated using X-ray diffraction (XRD) and transmission electron microscopy (TEM) to provide a better representation of the physical system. The CA has a large quantity of 2 nm pores as shown by nitrogen adsorption data. Both SAXS and TEM investigations confirm that MgH2 does form within the 2 nm pores but XRD proves that there is also a significant quantity of larger MgH2 particles within the system. Variations between hydrogen desorption isotherms from the CA/MgH2 composite and bulk MgH2 are detected that are indicative of changes in the decomposition properties of the small fraction of 2 nm MgH2 nanoparticles within the CA/MgH2 composite, changes which match theoretical predictions.
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