Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2018 Mar 29;8(22):12282-12291.
doi: 10.1039/c8ra01507d. eCollection 2018 Mar 26.

Amine-functionalized MIL-53(Al) with embedded ruthenium nanoparticles as a highly efficient catalyst for the hydrolytic dehydrogenation of ammonia borane

Shuren Zhang  1 , Liqun Zhou  1 , Menghuan Chen  1
Affiliations

Amine-functionalized MIL-53(Al) with embedded ruthenium nanoparticles as a highly efficient catalyst for the hydrolytic dehydrogenation of ammonia borane

Shuren Zhang et al. RSC Adv. .

Abstract

Well-dispersed ruthenium nanoparticles (Ru NPs) are immobilized within the pores of amine-functionalized MIL-53 via an in situ impregnation-reduction method. The resulting Ru/MIL-53(Al)-NH2 catalyst exhibits superior catalytic performance for the dehydrogenation of ammonia borane (AB) at ambient temperature relative to the Ru/MIL-53(Al) catalyst; it has a turnover frequency (TOF) of 287 mol H2 min-1 (mol Ru)-1 and an activation energy (E a) of 30.5 kJ mol-1. The amine groups present in the MIL-53(Al)-NH2 framework facilitate the formation and stabilization of ultra-small Ru NPs by preventing their aggregation. Additionally, the Ru/MIL-53(Al)-NH2 catalyst exhibits satisfactory durability and reusability: 72.4% and 86.3% of the initial catalytic activity was maintained after the fifth successive cycle of the hydrolytic dehydrogenation of AB in the two respective tests.

PubMed Disclaimer

Conflict of interest statement

There are no conflicts to declare.

Figures

Fig. 1
Fig. 1. (a) Wide-angle and (b) magnified Ru PXRD patterns of Ru/MIL-53(Al), MIL-53(Al), Ru/MIL-53(Al)-NH2, and MIL-53(Al)-NH2.
Fig. 2
Fig. 2. FT-IR spectra of (a) MIL-53(Al)-NH2, (b) Ru/MIL-53(Al)-NH2, and (c) Ru/MIL-53(Al)-NH2 after the fifth run in the durability test.
Fig. 3
Fig. 3. TEM images of (a and b) initially prepared Ru/MIL-53(Al)-NH2 and (c and d) Ru/MIL-53(Al)-NH2 after five catalytic cycles; particle size distribution of (e) initially prepared Ru/MIL-53(Al)-NH2 and (f) Ru/MIL-53(Al)-NH2 after five catalytic cycles; (g) EDX spectrum of Ru/MIL-53(Al)-NH2.
Fig. 4
Fig. 4. XPS spectra of the synthesized Ru/MIL-53(Al)-NH2 catalyst: (a) survey scan and (b) Ru 3p spectrum.
Fig. 5
Fig. 5. Hydrogen generation from the hydrolysis of AB catalyzed by Ru/MIL-53(Al)-NH2, Ru/MIL-53, Ru NPs, MIL-53(Al), and MIL-53(Al)-NH2.
Fig. 6
Fig. 6. (a and c) Effect of temperature on the hydrogen generation rate catalyzed by Ru/MIL-53(Al)-NH2 and Ru/MIL-53(Al) catalysts; (b and d) Arrhenius plots obtained from the corresponding temperature effects.
Fig. 7
Fig. 7. (a and c) Durability of Ru/MIL-53(Al)-NH2 and Ru/MIL-53(Al) catalysts from the 1st to the 5th cycle; (b and d) corresponding percentage of the initial catalytic activity remaining after successive cycles of AB hydrolysis.
Fig. 8
Fig. 8. (a and c) Reusability of the Ru/MIL-53(Al)-NH2 and Ru/MIL-53(Al) catalysts from the 1st to the 5th cycle; (b and d) corresponding percentage of the initial catalytic activity remaining after successive cycles of AB hydrolysis.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

References

    1. Jena P. J. Phys. Chem. Lett. 2011;2:206–211. doi: 10.1021/jz1015372. - DOI
    1. Akbayrak S. Tonbul Y. Ozkar S. Dalton Trans. 2016;45:10969–10978. doi: 10.1039/C6DT01117A. - DOI - PubMed
    1. Eberle U. Felderhoff M. Schuth F. Angew. Chem., Int. Ed. 2009;48:6608–6630. doi: 10.1002/anie.200806293. - DOI - PubMed
    1. Roy B. Manna J. Sharma P. J. Alloys Compd. 2015;645:234–238. doi: 10.1016/j.jallcom.2015.01.046. - DOI
    1. Wang H. Zhou L. Han M. Tao Z. Cheng F. Chen J. J. Alloys Compd. 2015;651:382–388. doi: 10.1016/j.jallcom.2015.08.139. - DOI