Enhanced hydrogen storage properties of LiAlH4 catalyzed by CoFe2O4 nanoparticles

摘要: The catalytic effects of CoFe2O4 nanoparticles on the hydrogen storage properties LiAlH4 prepared by ball milling were investigated. onset desorption temperature + 2 mol% sample is 65 °C, which 90 °C lower that as-received LiAlH4, with approximately 7.2 wt% released at 250 °C. isothermal results show for doped dehydrogenated 120 6.8 can be within 160 min, 6.1 higher than under same conditions. Through differential scanning calorimetry (DSC) and Kissinger kinetics analyses, apparent activation energy, Ea, calculated as 52.4 kJ mol−1 H2 86.5 first two decomposition processes. This 42.4 86.1 compared pristine respectively, indicating considerably improved dehydrogenation doping catalyst in matrix. From Fourier transform infrared spectroscopy (FTIR) X-ray diffraction (XRD) a series finely dispersed Fe Co species range valence states, produced from reactions between CoFe2O4, play synergistic role remarkably improving properties. rehydrogenation have also been investigated 140 6.5 MPa pressure held 2.5 h.