近期，我院研究生鄧正豪、教師陳代芬（通訊）、張劉挺（通訊）等的研究成果“Carbon-doped TiO₂ supported with NiCr particles: a significant boost to MgH₂ for hydrogen storage”在《Journal of Energy Storage》（IF=9.8）上發(fā)表。

論文簡介如下：

The industrial applications of magnesium hydride (MgH₂) for solid-state hydrogen storage are hindered by its slow kinetics and high operating temperature. A key strategy to overcome these limitations is the design of an efficient catalyst to improve kinetics and reduce operating temperature. In this study, we manipulated the hydrothermal reaction by introducing glycerol as a morphology-controlling agent to precisely regulate the morphology of the carbon-doped TiO₂ (CTiO₂) support. Two types of CTiO₂ supports with distinct morphologies were successfully synthesized: nanospheres (CTiO₂-NS) and nanoflakes (CTiO₂-NF). Subsequently, Ni-Cr bimetallic catalysts were deposited on these supports, leading to a significant enhancement in the hydrogen adsorption capacity of MgH₂.The MgH₂+7wt% CTiO₂-NiCr NF composite exhibited a reduced initial desorption temperature of 195°C, notably lower than pure MgH₂ (335°C). The release of 5.0wt% H₂ required 15 min at 250°C, 6.3 min at 265°C, 3.2 min at 280°C, and 1.7 min at 295°C. Additionally, hydrogen absorption by the MgH₂ + 7wt% CTiO₂-NiCr NF composite commenced at 42°C and reached 5.0wt% at 125°C in 8min. Following 20 cycles at 300°C, the composite maintained a hydrogen capacity of 6.41wt%. Experimental characterization revealed a multiphase synergistic effect among the components that facilitated the hydrogen spill-over effect. During dehydrogenation, Mg₂Ni and Mg₂NiH₄ served as active channels for hydrogen dissociation and adsorption, enhancing hydrogen transfer efficiency. Simultaneously the NiCr and C incorporated TiO₂ functioned as an electron transfer bridge, accelerating electron transfer rates and optimizing hydrogen migration and diffusion kinetics. In summary, our study offers novel insights into the design of multiphase catalysts for magnesium-based hydrogen storage and related applications.