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Hydrogen transport in single-walled carbon nanotubes encapsulated by palladium

Hydrogen transport and loading into single-walled carbon nanotubes (SWCNT) encapsulated by thin Pd layers onto a massive Pd substrate were studied using a complex of vacuum thermal desorption, cyclic voltammetry and ESR methods. By adding SWCNT the hydrogen capacity of the Pd–SWCNT composite under e... Full description

Journal Title: International Journal of Hydrogen Energy April 2012, Vol.37(7), pp.5676-5685
Main Author: Lipson, Andrei G.
Other Authors: Lyakhov, Boris F. , Saunin, Eugenyi I. , Solodkova, Lyudmila N. , Tsivadze, Aslan Y.
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0360-3199 ; DOI: 10.1016/j.ijhydene.2009.12.173
Link: http://dx.doi.org/10.1016/j.ijhydene.2009.12.173
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recordid: sciversesciencedirect_elsevierS0360-3199(09)02132-6
title: Hydrogen transport in single-walled carbon nanotubes encapsulated by palladium
format: Article
creator:
  • Lipson, Andrei G.
  • Lyakhov, Boris F.
  • Saunin, Eugenyi I.
  • Solodkova, Lyudmila N.
  • Tsivadze, Aslan Y.
subjects:
  • Hydrogen Transport
  • Hydrogen Loading
  • Single-Walled Carbon Nanotubes
  • Palladium Coating
ispartof: International Journal of Hydrogen Energy, April 2012, Vol.37(7), pp.5676-5685
description: Hydrogen transport and loading into single-walled carbon nanotubes (SWCNT) encapsulated by thin Pd layers onto a massive Pd substrate were studied using a complex of vacuum thermal desorption, cyclic voltammetry and ESR methods. By adding SWCNT the hydrogen capacity of the Pd–SWCNT composite under electrochemical loading increases as much as 25% relative to Palladium metal alone. This provides moderate growth in the gravimetric capacity of the total composite based on a massive Pd substrate. The hydrogen binding energy in the SWCNT (eH=0.075eV/H-atom), estimated by studies of hydrogen transport in the Pd–SWCNT composite was lower than predicted for the Pd–SWCNT complex, but higher than the physisorption on the bare SWCNT. Using ESR we established that the Pd–Cx e-complexes formed at the wall of nanotube could be considered as hydrogen adsorption site, providing both high net gravimetric capacity and low hydrogen binding energy in the Pd encapsulated SWCNT. The results obtained provide an opportunity to probe a condensed hydrogen phase of nanometer scale confined in SWCNT, encapsulated by transition metals.
language: eng
source:
identifier: ISSN: 0360-3199 ; DOI: 10.1016/j.ijhydene.2009.12.173
fulltext: no_fulltext
issn:
  • 03603199
  • 0360-3199
url: Link


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titleHydrogen transport in single-walled carbon nanotubes encapsulated by palladium
creatorLipson, Andrei G. ; Lyakhov, Boris F. ; Saunin, Eugenyi I. ; Solodkova, Lyudmila N. ; Tsivadze, Aslan Y.
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identifierISSN: 0360-3199 ; DOI: 10.1016/j.ijhydene.2009.12.173
subjectHydrogen Transport ; Hydrogen Loading ; Single-Walled Carbon Nanotubes ; Palladium Coating
descriptionHydrogen transport and loading into single-walled carbon nanotubes (SWCNT) encapsulated by thin Pd layers onto a massive Pd substrate were studied using a complex of vacuum thermal desorption, cyclic voltammetry and ESR methods. By adding SWCNT the hydrogen capacity of the Pd–SWCNT composite under electrochemical loading increases as much as 25% relative to Palladium metal alone. This provides moderate growth in the gravimetric capacity of the total composite based on a massive Pd substrate. The hydrogen binding energy in the SWCNT (eH=0.075eV/H-atom), estimated by studies of hydrogen transport in the Pd–SWCNT composite was lower than predicted for the Pd–SWCNT complex, but higher than the physisorption on the bare SWCNT. Using ESR we established that the Pd–Cx e-complexes formed at the wall of nanotube could be considered as hydrogen adsorption site, providing both high net gravimetric capacity and low hydrogen binding energy in the Pd encapsulated SWCNT. The results obtained provide an opportunity to probe a condensed hydrogen phase of nanometer scale confined in SWCNT, encapsulated by transition metals.
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abstractHydrogen transport and loading into single-walled carbon nanotubes (SWCNT) encapsulated by thin Pd layers onto a massive Pd substrate were studied using a complex of vacuum thermal desorption, cyclic voltammetry and ESR methods. By adding SWCNT the hydrogen capacity of the Pd–SWCNT composite under electrochemical loading increases as much as 25% relative to Palladium metal alone. This provides moderate growth in the gravimetric capacity of the total composite based on a massive Pd substrate. The hydrogen binding energy in the SWCNT (eH=0.075eV/H-atom), estimated by studies of hydrogen transport in the Pd–SWCNT composite was lower than predicted for the Pd–SWCNT complex, but higher than the physisorption on the bare SWCNT. Using ESR we established that the Pd–Cx e-complexes formed at the wall of nanotube could be considered as hydrogen adsorption site, providing both high net gravimetric capacity and low hydrogen binding energy in the Pd encapsulated SWCNT. The results obtained provide an opportunity to probe a condensed hydrogen phase of nanometer scale confined in SWCNT, encapsulated by transition metals.
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