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Title: Low-energy hydrogen uptake by small-cage Cn and Cn-1B fullerenes

Abstract

We present a theoretical study of the hydrogen uptake capability of carbon fullerene cages Cn and their boron-doped heterofullerene equivalents Cn-1B, with n = 20, 40, and 60, irradiated by hydrogen atoms in an impact energy range of 0.1–100 eV. In order to predict exohedral and endohedral hydrogen captures as well as the scattering probability of hydrogen for various cage types and sizes, we perform quantum-classical molecular dynamics (QCMD) calculations using the self-consistent-charge density-functional tight-binding (SCC-DFTB) method. Maximum endohedral hydrogen capture probabilities of 20% for n = 60 and 14% for n = 40 are found at impact energies close to 15 eV for both Cn and Cn-1B systems. For n = 20, however, endohedral capture is observed at a maximum of 2%, while the exohedral capture reaches a maximum of 5% both at 15 eV. Similar results for the hydrogen capture are obtained by classical molecular dynamics based on the ReaxFF potential. Lastly, the stopping cross section per carbon atom from the QCMD simulations for all cage sizes displays a linear dependence on the projectile velocity with a threshold at 0.8 eV, and extrapolates well to the available theoretical data.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [1]
  1. Univ. Nacional Autonoma de Mexico (UNAM), Cuernavaca, Morelos (Mexico). Inst. de Ciencias Fisicas
  2. Stony Brook Univ., NY (United States). Inst. for Advance Computational Science
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computational Sciences & Engineering Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1435244
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Carbon
Additional Journal Information:
Journal Volume: 134; Journal Issue: C; Journal ID: ISSN 0008-6223
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; Hydrogen storage; Fullerenes; Heterofullerenes; Molecular dynamics; SCC-DFTB; ReaxFF potentials; Energy loss; Stopping cross section; Endohedral; Angular scattering

Citation Formats

Dominguez-Gutierrez, F. Javier, Krstic, Predrag S., Irle, Stephan, and Cabrera-Trujillo, Remigio. Low-energy hydrogen uptake by small-cage Cn and Cn-1B fullerenes. United States: N. p., 2018. Web. doi:10.1016/j.carbon.2018.03.085.
Dominguez-Gutierrez, F. Javier, Krstic, Predrag S., Irle, Stephan, & Cabrera-Trujillo, Remigio. Low-energy hydrogen uptake by small-cage Cn and Cn-1B fullerenes. United States. https://doi.org/10.1016/j.carbon.2018.03.085
Dominguez-Gutierrez, F. Javier, Krstic, Predrag S., Irle, Stephan, and Cabrera-Trujillo, Remigio. 2018. "Low-energy hydrogen uptake by small-cage Cn and Cn-1B fullerenes". United States. https://doi.org/10.1016/j.carbon.2018.03.085. https://www.osti.gov/servlets/purl/1435244.
@article{osti_1435244,
title = {Low-energy hydrogen uptake by small-cage Cn and Cn-1B fullerenes},
author = {Dominguez-Gutierrez, F. Javier and Krstic, Predrag S. and Irle, Stephan and Cabrera-Trujillo, Remigio},
abstractNote = {We present a theoretical study of the hydrogen uptake capability of carbon fullerene cages Cn and their boron-doped heterofullerene equivalents Cn-1B, with n = 20, 40, and 60, irradiated by hydrogen atoms in an impact energy range of 0.1–100 eV. In order to predict exohedral and endohedral hydrogen captures as well as the scattering probability of hydrogen for various cage types and sizes, we perform quantum-classical molecular dynamics (QCMD) calculations using the self-consistent-charge density-functional tight-binding (SCC-DFTB) method. Maximum endohedral hydrogen capture probabilities of 20% for n = 60 and 14% for n = 40 are found at impact energies close to 15 eV for both Cn and Cn-1B systems. For n = 20, however, endohedral capture is observed at a maximum of 2%, while the exohedral capture reaches a maximum of 5% both at 15 eV. Similar results for the hydrogen capture are obtained by classical molecular dynamics based on the ReaxFF potential. Lastly, the stopping cross section per carbon atom from the QCMD simulations for all cage sizes displays a linear dependence on the projectile velocity with a threshold at 0.8 eV, and extrapolates well to the available theoretical data.},
doi = {10.1016/j.carbon.2018.03.085},
url = {https://www.osti.gov/biblio/1435244}, journal = {Carbon},
issn = {0008-6223},
number = C,
volume = 134,
place = {United States},
year = {Wed Aug 29 00:00:00 EDT 2018},
month = {Wed Aug 29 00:00:00 EDT 2018}
}

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Cited by: 12 works
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Molecular dynamics simulations for hydrogen adsorption in low energy collisions with carbon and boron-nitride nanotubes
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