Single Walled Carbon Nanotube-Metal Oxide Nanocomposites for Reversible and Reproducible Storage of Hydrogen

被引:51
|
作者
Silambarasan, D. [1 ]
Surya, V. J. [2 ]
Vasu, V. [1 ]
Iyakutti, K. [3 ]
机构
[1] Madurai Kamaraj Univ, Sch Phys, Madurai 625021, Tamil Nadu, India
[2] Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan
[3] SRM Univ, Dept Phys & Nanotechnol, Kattankulathur 603203, Tamil Nadu, India
关键词
single walled carbon nanotube-metal oxide composite; hydrogen; storage capacity; desorption temperature; reproducibility; deterioration; MOLECULAR-HYDROGEN; SPILLOVER; CAPACITY; FILMS; NI;
D O I
10.1021/am403662t
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Composite material consisting of single walled carbon nanotubes (SWCNTs) and metal oxide nanoparticles has been prepared and their hydrogen storage performance is evaluated. Metal oxides such as tin oxide (SnO2), tungsten trioxide (WO3), and titanium dioxide (TiO2) are chosen as the composite constituents. The composites have been prepared by means of ultrasonication. Then, the composite samples are deposited on alumina substrates and at 100 degrees C in a Sieverts-like hydrogenation setup. Characterization techniques such as transmission electron microscopy (TEM), Raman spectroscopy, scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, energy dispersive spectroscopy (EDS), CHN elemental analysis, and thermogravimetric (TG) measurements are used to analyze the samples at various stages of experiments. Hydrogen storage capacity of the composites namely, SWCNT-SnO2, SWCNT-WO3, and SWCNT-TiO2 are found to be 1.1, 0.9, and 1.3 wt %, respectively. Hydrogenated composite samples are stable at room temperature and desorption of hydrogen is found to be 100% reversible. Desorption temperature ranges and binding energy ranges of hydrogen have been measured from the desorption studies. The hydrogenation, dehydrogenation temperature, and binding energy of hydrogen fall in the recommended range of a suitable hydrogen storage medium applicable for fuel cell applications. Reproducibility and deterioration level of the composite samples have also been examined.
引用
收藏
页码:11419 / 11426
页数:8
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