Catalytic effects improve hydrogen storage and dehydrogenation in Mg–La–Ni alloys, suggesting enhanced kinetics.
Yb₂O₃@C, Gd₂O₃@C, and CeO₂@C hybrid catalysts with porous, defect-rich structures were synthesized via a modified vaporization-carbonization method and incorporated (7 wt %) into Mg₉₆La₃Ni alloys by ball milling. Yb₂O₃@C increased hydrogen absorption, while Gd₂O₃@C and CeO₂@C reduced it; all enhanced dehydrogenation, with CeO₂@C most effective. At 360 °C, 3 wt % H₂ was released in 3.1 min for pristine Mg₉₆La₃Ni, but only 1.0, 1.9, and 2.7 min with CeO₂@C, Yb₂O₃@C, and Gd₂O₃@C, respectively. CeO₂@C reduced the activation energy from 121.67 to 109.78 kJ/mol. This study highlights the novelty of combining rare-earth oxides with defective carbon supports, where in situ hydrides act as "hydrogen pumps" and carbon frameworks provide nucleation sites. This synergistic strategy enhances kinetics and cycling stability without altering thermodynamics, offering new insights for Mg-based hydrogen storage alloys.
No takes yet. Share an insight, caveat, or question.
Liu et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: