近期，我院研究生楊明，教師王雨鑫（通訊）、張劉挺（通訊）等的研究成果“Incorporating in-situ formed Ti3+and oxygen vacancies to TiO2 via Ni loading for superior hydrogen storage in magnesium hydride”在《International Journal of Hydrogen Energy》（IF=8.3）上發(fā)表。
論文簡介如下：
Herein, enhanced performance of catalyzed magnesium hydride (MgH2) was achieved through the rational design of TiO2 substrates incorporated with in-situ formed Ti3? and oxygen vacancies (OV) via a nanoscale nickel (Ni) immobilization strategy. The synergistic interplay between Ni-Ti bimetallic coordination and the multifunctional roles of OV collectively contributed to the remarkable catalytic enhancement. Experimental results demonstrated that the MgH2+7 wt% Ni/TiO2 composite exhibited a drastically reduced initial dehydrogenation temperature of 197 °C with a hydrogen release of 5.98 wt% within 5 minutes under isothermal condition of 265 °C. Notably, the system displayed exceptional low-temperature hydrogen adsorption properties, initiating hydrogen uptake at 45°C and reaching a reversible adsorption capacity of 4.41 wt% within 5 minutes at 165°C. Mechanistic investigations elucidated that the superior hydrogen storage performance of the Ni/TiO2 catalyst originates from multi-scale synergistic effects, including: (1) valence-state modulation of titanium species (Ti3+/Ti4+), (2) localized electronic restructuring induced by oxygen vacancies, and (3) hydrogen pump effects facilitated by the Ni-based catalyst. By integrating electronic structure engineering with interfacial catalytic synergy, this work establishes both theoretical frameworks and experimental validation for developing high-capacity, energy-efficient solid-state hydrogen storage materials.
