Atomic layer deposition of ruthenium nanoparticles on electrospun carbon nanofibers: a highly efficient nanocatalyst for the hydrolytic dehydrogenation of methylamine borane
Author
Khalily, M. A.
Yurderi, M.
Haider A.
Bulut, A.
Patil, B.
Zahmakiran, M.
Uyar, Tamer
Date
2018Source Title
ACS Applied Materials and Interfaces
Print ISSN
1944-8244
Electronic ISSN
1944-8252
Publisher
American Chemical Society
Volume
10
Issue
31
Pages
26162 - 26169
Language
English
Type
ArticleItem Usage Stats
131
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Abstract
We report the fabrication of a novel and highly active nanocatalyst system comprising electrospun carbon nanofiber (CNF)-supported ruthenium nanoparticles (NPs) (Ru@CNF), which can reproducibly be prepared by the ozone-assisted atomic layer deposition (ALD) of Ru NPs on electrospun CNFs. Polyacrylonitrile (PAN) was electropsun into bead-free one-dimensional (1D) nanofibers by electrospinning. The electrospun PAN nanofibers were converted into well-defined 1D CNFs by a two-step carbonization process. We took advantage of an ozone-assisted ALD technique to uniformly decorate the CNF support by highly monodisperse Ru NPs of 3.4 ± 0.4 nm size. The Ru@CNF nanocatalyst system catalyzes the hydrolytic dehydrogenation of methylamine borane (CH3NH2BH3), which has been considered as one of the attractive materials for the efficient chemical hydrogen storage, with a record turnover frequency of 563 mol H2/mol Ru × min and an excellent conversion (>99%) under air at room temperature with the activation energy (Ea) of 30.1 kJ/mol. Moreover, Ru@CNF demonstrated remarkable reusability performance and conserved 72% of its inherent catalytic activity even at the fifth recycle.
Keywords
Ammonia boraneAtomic layer deposition
Carbon nanofibers
Catalysis
Electrospinning
Hydrogen generation
Methylamine borane
Ruthenium nanoparticles