Nanoscale Structures and Hydrogen Storage Capacity of Fe-C-H Produced by Milling Graphite with Steel Balls in a Hydrogen Atmosphere
Author
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-09-09
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
To elucidate the influence of Fe on the interaction between carbon and hydrogen in graphite nanocrystals, graphite nanocrystals were mechanically milled with steel balls in a hydrogen atmosphere, and the potential of the material produced to store hydrogen was evaluated.
X-ray diffraction and Raman spectra revealed that milling reduced the graphene size and increased the average distance between graphene layers.
Elemental analysis showed that milling increased both the H/C and Fe/C ratios in the material.
After being milled in a hydrogen atmosphere, samples released hydrogen at a lower temperature than before milling.
Thermal decomposition occurred in two stages—235 to 475°C and 692 to 749°C—and yielded a total of 1.0 wt% hydrogen.
It is hypothesized that these two stages corresponded to hydrogen released from Fe3C structures and from the Fe-catalyzed graphitization reaction, respectively.
Before milling, samples slowly released a total of 0.5 wt% hydrogen over a temperature range from about 300 to over 900°C.
Fe-C-H materials are attractive for hydrogen storage because they are composed of carbon and iron, which are inexpensive and abundant elements on Earth, and they have a high hydrogen weight density of 11 wt%.
American Psychological Association (APA)
Wakayama, Hiroaki. 2019. Nanoscale Structures and Hydrogen Storage Capacity of Fe-C-H Produced by Milling Graphite with Steel Balls in a Hydrogen Atmosphere. Journal of Nanomaterials،Vol. 2019, no. 2019, pp.1-7.
https://search.emarefa.net/detail/BIM-1182569
Modern Language Association (MLA)
Wakayama, Hiroaki. Nanoscale Structures and Hydrogen Storage Capacity of Fe-C-H Produced by Milling Graphite with Steel Balls in a Hydrogen Atmosphere. Journal of Nanomaterials No. 2019 (2019), pp.1-7.
https://search.emarefa.net/detail/BIM-1182569
American Medical Association (AMA)
Wakayama, Hiroaki. Nanoscale Structures and Hydrogen Storage Capacity of Fe-C-H Produced by Milling Graphite with Steel Balls in a Hydrogen Atmosphere. Journal of Nanomaterials. 2019. Vol. 2019, no. 2019, pp.1-7.
https://search.emarefa.net/detail/BIM-1182569
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1182569