Metallic Ni nanocatalyst in situ formed from a metal-organic-framework by mechanochemical reaction for hydrogen storage in magnesium
Author(s)
Jia, Yi
Sun, Chenghua
Peng, Ye
Fang, Wenqi
Yan, Xuecheng
Yang, Dongjiang
Zou, Jin
Mao, Samuel S
Yao, Xiangdong
Year published
2015
Metadata
Show full item recordAbstract
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 MgH2 matrix, which capitalizes on the in situ bottom-up reduction of Ni-MOF-74 in the presence of MgH2 as a reducing and sacrificing agent at room temperature. Both theoretical calculations and ...
View more >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 MgH2 matrix, which capitalizes on the in situ bottom-up reduction of Ni-MOF-74 in the presence of MgH2 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.
View less >
View more >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 MgH2 matrix, which capitalizes on the in situ bottom-up reduction of Ni-MOF-74 in the presence of MgH2 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.
View less >
Journal Title
Journal of Materials Chemistry A: Materials for Energy and Sustainability
Volume
3
Issue
16
Subject
Macromolecular and materials chemistry
Macromolecular and materials chemistry not elsewhere classified
Materials engineering