Improvement of Hydrogenation and Dehydrogenation Kinetics on MgH2 by the Catalytic Effect of ZrO2
Hydrogen desorption temperature of MgH2, which was milled with 20 pieces of ZrO2 balls for 20 h, was decreased to 240 °C, although steel−ball−milled MgH2 required more than 350 °C. Moreover, the completely dehydrogenated product was able to absorb hydrogen of ~3.5 mass% even at room temperature under 1 MPa hydrogen within 5 hours. Inductively coupled plasma−atomic emission spectroscopy analysis revealed zirconium element was doped into MgH2 from the ZrO2 balls during the milling process. Therefore, it was concluded that the presence of ZrO2 improved the kinetics of the hydrogenation and dehydrogenation behaviors of MgH2.
Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen
L. Zeng et al., "Improvement of Hydrogenation and Dehydrogenation Kinetics on MgH2 by the Catalytic Effect of ZrO2", Applied Mechanics and Materials, Vols. 117-119, pp. 1195-1198, 2012