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Studies of Multi-walled Carbon Nanotubes and Their Capabilities of Hydrogen Adsorption

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Part of the book series: Environmental Chemistry for a Sustainable World ((ECSW,volume 24))

Abstract

Over the last decade, there has been a significant interest of the scientific community in the synthesis of carbonaceous materials due to its wide range of application, as well on the hydrogen storage problem. Since the discovery of carbon nanotubes by Iijima, carbon nanotubes have been one of the candidate nanomaterials for hydrogen storage. However, experimental studies on hydrogen storage capacity of carbon nanotubes are still very few, and the mechanism of how hydrogen is stored into carbon nanotubes and the factors affecting the adsorption remains still unclear.

In this chapter, we describe in detail the synthesis, purification, structural characterization, and hydrogen adsorption capabilities of multi-walled carbon nanotubes (MWCNTs) obtained by an aerosol-assisted chemical vapor deposition (AACVD) method and using low-cost raw materials. In our investigation, we found that the hydrogen adsorption capacity was strongly dependent on the chemical, structural, and morphological characteristics of the carbon nanotubes obtained and purified which depend on the starting materials used for the synthesis by AACVD. In addition, hydrogen storage properties of MWCNTs were studied using a quartz crystal microbalance (QCM). Values between 0.22 and 3.46 wt% of adsorbed hydrogen were reached depending on the exposure pressure at room temperature. The maximum adsorption capacity was obtained for a purified sample with specific surface area of 729.4 ± 2.8 m2 g−1 and average pore size of 22.3 nm.

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Acknowledgments

This research was partially funded by CONICYT (Grant no. ACT1117 and ID14I10124). We also acknowledge professor A. Cabrera from Physics Institute of the Pontificia Universidad Católica de Chile and facilities from Universidad de Chile for the provision of equipment and measurements for this research.

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Correspondence to Edgar Mosquera .

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Mosquera, E. et al. (2019). Studies of Multi-walled Carbon Nanotubes and Their Capabilities of Hydrogen Adsorption. In: Rajendran, S., Naushad, M., Balakumar, S. (eds) Nanostructured Materials for Energy Related Applications. Environmental Chemistry for a Sustainable World, vol 24. Springer, Cham. https://doi.org/10.1007/978-3-030-04500-5_6

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