@misc{barkhordarian_kinetic_investigation_2006, author={Barkhordarian, G.,Klassen, T.,Bormann, R.}, title={Kinetic investigation of the effect of milling time on the hydrogen sorption reaction of magnesium catalyzed with different Nb2O5 contents}, year={2006}, howpublished = {journal article}, doi = {https://doi.org/10.1016/j.jallcom.2005.05.037}, abstract = {The effect of milling time and Nb2O5 content on the magnesium hydrogen sorption reaction is investigated in this paper. The absorption and desorption kinetics of magnesium at 300 ◦C, with 0.05, 0.1, 0.2, 0.5, 1 mol% Nb2O5 contents and after 2, 5, 10, 20, 50, 100 h milling were measured. Reaction kinetics can be enhanced up to a certain limit by increasing the milling time or increasing the Nb2O5 content. The kinetic rate constants for different milling times and Nb2O5 contents were calculated and compared. Furthermore the rate-limiting step of the absorption and the desorption reactions was determined by fitting the respective kinetic equations. While the absorption is diffusion controlled,,the rate-limiting step for desorption changes, with increasing of milling time or Nb2O5 content, from chemisorption to interface velocity of the transformed phase, demonstrating the effectiveness of the Nb2O5 catalyst.}, note = {Online available at: \url{https://doi.org/10.1016/j.jallcom.2005.05.037} (DOI). Barkhordarian, G.; Klassen, T.; Bormann, R.: Kinetic investigation of the effect of milling time on the hydrogen sorption reaction of magnesium catalyzed with different Nb2O5 contents. Journal of Alloys and Compounds. 2006. vol. 407, no. 1-2, 249-255. DOI: 10.1016/j.jallcom.2005.05.037}}