Dehydriding reaction of AlH3: in situ microscopic observations combined with thermal and surface analyses.
The dehydriding reaction of single-phase alpha- AlH3 was investigated by in situ microscopic observations combined with thermal and surface analyses. Before the dehydriding reaction, primary AlH3 particles of size 100 nm-1 microm were thought to be covered by an oxide layer with a thickness of less than 5 nm. Both the precipitation/grain-growth of metallic Al of size 1-50 nm and an increase in 'boundary space' were clearly observed inside the particles, while the morphologies of the particles covered by the layer did not change during the dehydriding reaction. This preliminary report provides fundamental information for a further study of AlH3 as a possible hydrogen storage material.
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
K
K
Ikeda
S
S
Muto
K
K
Tatsumi
M
M
Menjo
S
S
Kato
M
M
Bielmann
A
A
Züttel
C M
CM
Jensen
S
S
Orimo
D000535:Aluminum / Q000737:chemistry*; D003198:Computer Simulation; D003460:Crystallization / Q000379:methods*; D006859:Hydrogen / Q000737:chemistry* / Q000302:isolation & purification*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008956:Models, Chemical; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties
D046911:Macromolecular Substances; D006859:Hydrogen; D000535:Aluminum