Carbon as a high capacity solid state storage medium for hydrogen

Author

Ahn, C.C. ; Ye, Y. ; Ratnakumar, B.V. ; Witham, C. ; Bowman, R.C., Jr. ; Fultz, B.

Author_Institution

Dept. of Eng. & Appl. Sci., California Inst. of Technol., Pasadena, CA, USA

fYear

1999

fDate

1999

Firstpage

67

Lastpage

71

Abstract

Graphite nanofibers were synthesized and their hydrogen desorption and adsorption properties are reported for temperatures of 77 and 300 K. Catalysts were made by several different methods including chemical routes, mechanical alloying and gas condensation. The nanofibers were grown by passing ethylene and H₂ gases over the catalysts at 600°C. Hydrogen desorption and adsorption were measured using a volumetric analysis Sieverts´ apparatus, and the graphite nanofibers were characterized by transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET) surface area analysis. The absolute level of hydrogen desorption measured from these materials was typically less than 0.01 H/C atom, comparable to other forms of carbon

Keywords

adsorption; carbon nanotubes; catalysts; desorption; graphite; hydrogen economy; transmission electron microscopy; 300 K; 600 C; 77 K; Brunauer-Emmett-Teller surface area analysis; C; H₂; H₂ gases; TEM; carbon; catalysts; ethylene; gas condensation; graphite nanofibers synthesis; high capacity solid state storage medium; hydrogen adsorption; hydrogen desorption; hydrogen storage material; mechanical alloying; transmission electron microscopy; volumetric analysis Sieverts´ apparatus; Alloying; Area measurement; Atomic measurements; Chemicals; Gases; Hydrogen storage; Mechanical factors; Solid state circuits; Temperature; Volume measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Battery Conference on Applications and Advances, 1999. The Fourteenth Annual

Conference_Location

Long Beach, CA

ISSN

1089-8182

Print_ISBN

0-7803-4967-9

Type

conf

DOI

10.1109/BCAA.1999.795968

Filename

795968