The facile and scalable fabrication of ultrafine (<5 nm) nanoparticles (NPs) as effective catalysts is the key for enhancing the kinetics of most hydrogen storage materials (HSMs). The direct fabrication of ultrafine NPs in HSMs is obviously a challenge because of the inevitable NPs agglomeration during the thermo-reduction. Herein, we report a mechanochemical-force-driven procedure for the one-step preparation of Ni NPs (2-3 nm) in a MgH 2 matrix, which capitalizes on the in situ bottom-up reduction of Ni-MOF-74 in the presence of MgH 2 as a reducing and sacrificing agent at room temperature. Both theoretical calculations and experimental investigations show that ultrafine Ni NPs are much more effective on catalytic hydrogenation/dehydrogenation in Mg due to the size effect. These findings may facilitate the fabrication of other catalyzed HSMs using different MOFs as catalyst precursors.
CITATION STYLE
Jia, Y., Sun, C., Peng, Y., Fang, W., Yan, X., Yang, D., … Yao, X. (2015). Metallic Ni nanocatalyst in situ formed from a metal-organic-framework by mechanochemical reaction for hydrogen storage in magnesium. Journal of Materials Chemistry A, 3(16), 8294–8299. https://doi.org/10.1039/c5ta00278h
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