Fractal disperse hydrogen sorption kinetics in spark discharge generated Mg/NbOx and Mg/Pd nanocomposites

Fractal disperse hydrogen sorption kinetics in spark discharge generated Mg/NbOx and Mg/Pd nanocomposites

Anastasopol, A.
Pfeiffer, T.V.
Schmidt-Ott, A.
Mulder, F.M.
Eijt, S.W.H.

Applied Sciences

2011-11-08

Isothermal hydrogen desorption of spark discharge generated Mg/NbOx and Mg/Pd metal hydride nanocomposites is consistently described by a kinetic model based on multiple reaction rates, in contrast to the Johnson-Mehl-Avrami-Kolmogorov [M. Avrami, J. Phys. Chem. 9, 177 (1941); W. A. Johnson and R. F. Mehl, Trans. Am. Inst. Min., Metal. Eng. 135, 416 (1939); A. N. Kolmogorov, Izv. Akad. Nauk SSSR, Ser. Mat. 3, 355 (1937); F. Liu, F. Sommer, C. Bos, and E. J. Mittemeijer, Int. Mat. Rev. 52, 193 (2007)] model which is commonly applied to explain the kinetics of metal hydride transformations. The broad range of reaction rates arises from the disperse character of the particle size and the dendritic morphology of the samples. The model is expected to be generally applicable for metal hydrides which show a significant variation in particle sizes, in configuration and/or chemical composition of local surroundings of the reacting nanoparticles.

chemical analysis
chemical reactions
desorption
magnesium
magnesium compounds
nanocomposites
niobium compounds
palladium
particle size
plasma materials processing
sparks

http://resolver.tudelft.nl/uuid:2261aaac-afb4-48b4-a0b4-c482efab23c8

https://doi.org/10.1063/1.3659315

American Institute of Physics

0003-6951

http://link.aip.org/link/doi/10.1063/1.3659315

Applied Physics Letters, 99 (19), 2011

Institutional Repository

journal article

(c) 2011 The Author(s)
American Institute of Physics