| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1523786 | Materials Chemistry and Physics | 2012 | 5 Pages |
Nanoscale MgH2 was synthesized through loading di-n-butylmagnesium (MgBu2) solution into the pores of ordered mesoporous silicas (SBA-15) with a pore diameter in a range of 5–10 nm, followed by freeze drying and hydrogenation treatment. The MgBu2 inside the pore channels of SBA-15 decomposed into MgH2 upon hydrogenation at 493 K under 6 MPa hydrogen. The nanoconfined MgH2 exhibited greatly decreased desorption temperature of 540 K, a reduction of 146 K in comparison with that of commercial MgH2, or 65 K reduction relative to that of MgH2 obtained from MgBu2 without confinement. Moreover, lower desorption temperature for the MgH2 supported by SBA-15 with smaller pore diameter. The improvement on the dehydrogenation properties of MgH2 was attributed to the nanosizing effect induced by the nanoconfinement of mesoporous silica.
► We synthesized nanoscale MgH2 via confinement of mesoporous silica. ► The loaded MgBu2 decomposed into MgH2 upon hydrogenation. ► The nanoconfined MgH2 showed greatly decreased desorption temperature. ► Lower desorption temperature for the support with smaller pore diameter.
