期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 111, 期 6, 页码 2679-2682出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp066644w
关键词
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Palladium-doped double-walled silica nanotubes (SNTs) were synthesized by sol-gel transcription, and H-2 adsorption experiments were carried out at 298 K. The H-2-storage capacities of the palladium-doped SNTs were 0.15 wt % for SNT-5, 1.90 wt % for SNT-10, and 0.75 wt % for SNT-15, showing that the palladium-doped tubes are very effective as an H-2-storage material even at room temperature. Remarkably, SNT-10 had the highest storage capacity. The results indicate that palladium nanoparticles acted as the primary receptor for adsorption of atomic hydrogen. Also, this finding suggests that a moderate amount of palladium nanoparticles is important to effectively uptake H-2 in the nanotubes. We suggest that palladium-doped double-walled SNTs are useful as H-2-storage materials in fuel cells.
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