Exfoliation of compact layered Ti2VAlC2 MAX to open layered Ti2VC2 MXene towards enhancing the hydrogen storage properties of MgH2

Bimetal Three-Dimensional MXene Nanostructures Stabilizing Magnesium Hydrides Realize Long Cyclic Life and Faster Kinetic Rates

“…This uniformly distributed MgH 2 and nanocatalysts show a high impact on the improved hydrogen storage performance. 18,28 These results confirm the formation of the MgH 2 @3D-TiVCT x nanocomposite and uniformly distributed Ti/V nanocatalysts on the MgH 2 matrix. Hydrogen Storage Performance of the MgH 2 @3D-TiVCT x Nanocomposite.…”

“…The V 2p 3/2 spectrum contains V 2+ (512.7 eV), V 3+ (513.9 eV), V 4+ (514.2 eV), V 5+ (515.8 eV), and V−C (517.1 eV) fitted curves, whereas V 2p 1/2 is fitted with V 2+ (520.5 eV), V 3+ (522.1 eV), and V 5+ (523.4 eV) spectra, respectively. 10,28 Preparation of MgH 2 @3D-TiVCT x Nanocomposites. MgH 2 nanoparticles and MXene structures were mixed together to prepare MgH 2 @MXene nanocomposites via high-energy planetary ball milling for 8 h in the hydrogen environment.…”

“…22 This designing also shows that the 3D-TiVCT x MXene might be worked as the active sites for the nucleation/ growth of MgH 2 , which is similar to the previously reported results. 28,34 In addition, the hydrogen desorption process on the MgH 2 surface can also be promoted by the "burst effect" through nanocatalysts, which further enhance the kinetic performance. 35 Furthermore, the TiVO 4 phase around MgH 2 nanoparticles also boosts the hydrogen storage performance, reducing the desorption temperature and activation energies remarkably.…”

Synergistic Combination of Ni Nanoparticles and Ti3C2 MXene Nanosheets with MgH2 Particles for Hydrogen Storage

“…Tian et al fabricated an MgH 2 composite incorporating 5 wt % Ti 3 C 2 that could release 4.8 wt % hydrogen in 10 min at 300 °C, demonstrating superior hydrogen release kinetic performance to other transition-metal carbide catalysts. Liu et al prepared a bimetallic Ti 2 VC 2 MXene by exfoliation of the densely layered Ti 2 VAlC 2 MAX and introduced it to MgH 2 . The results revealed that the MgH 2 + 10% Ti 2 VC 2 composite could begin releasing hydrogen at 170 °C and desorb 6.2 wt % hydrogen in 5 min at 300 °C.…”

“…to other transition-metal carbide catalysts. Liu et al22 prepared a bimetallic Ti 2 VC 2 MXene by exfoliation of the densely layered Ti 2 VAlC 2 MAX and introduced it to MgH 2 . The results revealed that the MgH 2 + 10% Ti 2 VC…”