Diffusion of molecular hydrogen in carbon aerogel

Emanuel Bahn, Orsolya Czakkel, Balázs Nagy, K. László, Silvia Villar-Rodil, Juan M D Tascón, Franz Demmel, Mark T F Telling, Peter Fouquet

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The diffusion of hydrogen molecules adsorbed in a highly porous carbon aerogel has been studied with quasi-elastic neutron scattering. Hydrogen diffusion in this carbon substrate followed an activated jump process with a single activation barrier. The temperature dependence of the diffusion rate agrees well with previous results from activated carbons and other highly porous carbons. The carbon aerogel sample showed a strongly enhanced conversion between the ortho- and para-hydrogen spin states. The ortho-para conversion process, however, was inhibited for a fraction of the hydrogen molecules. This inhibition process is attributed to a rotational confinement of the hydrogen molecules at the nanometre scale.

Original languageEnglish
Pages (from-to)572-581
Number of pages10
JournalCarbon
Volume98
DOIs
Publication statusPublished - Mar 1 2016

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Aerogels
Hydrogen
Carbon
Molecules
Elastic scattering
Neutron scattering
Activated carbon
Chemical activation
Substrates
Temperature

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Bahn, E., Czakkel, O., Nagy, B., László, K., Villar-Rodil, S., Tascón, J. M. D., ... Fouquet, P. (2016). Diffusion of molecular hydrogen in carbon aerogel. Carbon, 98, 572-581. https://doi.org/10.1016/j.carbon.2015.11.034

Diffusion of molecular hydrogen in carbon aerogel. / Bahn, Emanuel; Czakkel, Orsolya; Nagy, Balázs; László, K.; Villar-Rodil, Silvia; Tascón, Juan M D; Demmel, Franz; Telling, Mark T F; Fouquet, Peter.

In: Carbon, Vol. 98, 01.03.2016, p. 572-581.

Research output: Contribution to journalArticle

Bahn, E, Czakkel, O, Nagy, B, László, K, Villar-Rodil, S, Tascón, JMD, Demmel, F, Telling, MTF & Fouquet, P 2016, 'Diffusion of molecular hydrogen in carbon aerogel', Carbon, vol. 98, pp. 572-581. https://doi.org/10.1016/j.carbon.2015.11.034
Bahn E, Czakkel O, Nagy B, László K, Villar-Rodil S, Tascón JMD et al. Diffusion of molecular hydrogen in carbon aerogel. Carbon. 2016 Mar 1;98:572-581. https://doi.org/10.1016/j.carbon.2015.11.034
Bahn, Emanuel ; Czakkel, Orsolya ; Nagy, Balázs ; László, K. ; Villar-Rodil, Silvia ; Tascón, Juan M D ; Demmel, Franz ; Telling, Mark T F ; Fouquet, Peter. / Diffusion of molecular hydrogen in carbon aerogel. In: Carbon. 2016 ; Vol. 98. pp. 572-581.
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