Atomic Layer Deposition of Ruthenium Nanoparticles on Electrospun Carbon Nanofibers: A Highly Efficient Nanocatalyst for the Hydrolytic Dehydrogenation of Methylamine Borane


Khalily M. A. , Yurderi M., Haider A., BULUT A., Patil B., Zahmakıran M. , ...Daha Fazla

ACS APPLIED MATERIALS & INTERFACES, cilt.10, ss.26162-26169, 2018 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 10 Konu: 31
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1021/acsami.8b04822
  • Dergi Adı: ACS APPLIED MATERIALS & INTERFACES
  • Sayfa Sayıları: ss.26162-26169

Özet

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 H-2/mol Ru x min and an excellent conversion (>99%) under air at room temperature with the activation energy (E-a) 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.