Improved Hydrogen Desorption Kinetics of MgH₂ Nanoparticles by Using TiC Nanocatalyst

Abstract:

Magnesium hydride (MgH₂) is considered to be a promising hydrogen storage material because of its high gravimetric and volumetric storage capacities. However, its slow kinetics and high desorption temperature (> 300 °C) limit the practical applications. We have selected TiC nanoparticles to modify the hydrogen storage properties of MgH₂. First, Mg nanoparticles were synthesized by thermal desorption of bipyridyl complex of Mg and then MgH₂ nanoparticles were obtained by hydriding the Mg nanoparticles. Composite mixtures (MgH₂ + TiC) were prepared using high-energy ball milling. Structural analysis, morphology and particle size were investigated by X-rays diffractometer (XRD) and scanning electron microscopy (SEM) respectively. Hydrogen desorption properties of MgH₂ was investigated with various amount of TiC nanocatalyst using differential scanning calorimetry (DSC) and seivertz type apparatus (PCT). Desorption kinetics were also studied by pressure composition isotherm (PCI). Results show that the product reveals good reversible hydrogen absorption-desorption cycles even at >150 °C. The hydrogen desorption kinetics of catalyzed and noncatalyzed MgH₂ could be understood by a modified first-order reaction model, in which the surface condition was taken into account.

• Periodical: Key Engineering Materials (Volumes 510-511)
• Pages: 371-377
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.510-511.371
• Online since: May 2012
• Authors: N.A. Niaz, S.T. Hussain, S. Nasir, I. Ahmad
• Keywords: High Energy Ball Milling, Hydrogen Desorption, Nano-Catalyst, SEM

References

[1] H. -L. Chu, S. -J. Qiu, Q. -F. Tian, L. -X. Sun, Y. Zhang, F. Xu, Y. -Y. Liu, Y. -N. Qi and M. -Q. Fan: Int. J. Hydr. Energy Vol. 32 (2007), p.4925.

[2] E.C. Souza and E.A. Ticianelli: Int. J. Hydr. Energy Vol. 32 (2007), p.4917.

[3] T.Z. Si, D.M. Liu and Q.A. Zhang: Int. J. Hydr. Energy Vol. 32 (2007), p.4912.

[4] B. Bogdanovic and B. Spliethoff: Int. J. Hydr. Energy Vol. 12 (1987), p.863.

[5] W. Fan, S. Sun, L. You, G. Cao, X. Song, W. Zhang and H. Yu: J. Mat. Chemistry Vol. 13 (2003), p.3062.

[6] G. Liang: J. Alloy. Compounds Vol. 370 (2004), p.123.

[7] A. Ranjbar, M. Ismail, Z.P. Guo, X.B. Yu and H.K. Liu: Int. J. Hydr. Energy Vol. 35 (2010), p.7821.

[8] C.Z. Wu, P. Wang, X. Yao, C. Liu, D.M. Chen, G.Q. Lu and H.M. Cheng: J. Alloy. Compounds Vol. 420 (2006), p.278.

[9] P.W. Chengzhang Wu, X. Yao, CH. Liu, D. Chen, H.C. Gao Qing Lu: J. Phys. Chem. B Vol. (2005), p.22217.

[10] G. Barkhordarian, T. Klassen and R. Bormann Scr. Materialia Vol. 49 (2003), p.213.

[11] L. Xie, Y. Liu, X. Zhang, J. Qu, Y. Wang and X. Li: J. Alloy. Compounds Vol. 482 (2009), p.388.

[12] T.I. Nobuko Hanada, and H. Fujii: J. Phys. Chem. B Vol. 109 ( 2005 ), p.7188.

[13] M. -Q. Fan, L. -X. Sun, Y. Zhang, F. Xu, J. Zhang and H. -l. Chu: I Int. J. Hydr. Energy Vol. 33 (2008), p.74.

[14] M. Tian and C. Shang: J. Chem. Tech. & Biotechnology, 86 (2011), pp.69-74.

[15] J.H. Shin, G. -J. Lee, Y.W. Cho and K.S. Lee: Catal. Today Vol. 146 (2009), p.209.

[16] H.E. KlSSlNGER: anal. Chemistry Vol. 29 (1957), p.1702.