Differential Permeability of Proton Isotopes through Graphene and Graphene Analogue Monolayer

Qiuju Zhang, Minggang Ju, Liang Chen, Xiao C Zeng

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Two-dimensional (2D) monolayer nanomaterials can be exploited as the thinnest membrane with distinct differential sieving properties for proton isotopes. Motivated from the experimental evidence of differential sieving proton isotopes through graphene and hexagonal boron nitrate (h-BN) monolayer, we compute the kinetic barrier of isotope H+ and D+ permeation through model graphene and h-BN fragments at the MP2/6-31++G(d,p) level of theory. On the basis of the ratio of tunneling reaction rate constant, the isotope separation ratio of H+/D+ and H+/T+ is predicted to be ∼12 and 37, respectively. The tunneling reaction rate constant can be estimated from the zero-point-energy computed at the transition state for the proton isotope permeation though the 2D model systems. We show that the presence of Stone-Wales (55-77) defect in the model graphene fragment can significantly lower the proton permeation barrier by 0.55 eV. With the defect, the ratio of tunneling reaction rate constant of H+/D+ is increased to ∼25. In addition to model graphene and h-BN, we have examined proton permeation capability of α-boron monolayer. We compute the tunneling reaction pathway for H+ through α-boron monolayer using both the climbing nudged elastic band (c-NEB) method and the scanning-path method. Both methods suggest that α-boron monolayer entails a relatively low barrier of ∼0.20 eV for H+ permeation, much lower than that of the model graphene and h-BN fragments. Our studies provide molecular-level insights into the differential permeation of proton isotopes through 2D materials. The methods can be extended to examine isotope separation capability of other 2D materials as well.

Original languageEnglish (US)
Pages (from-to)3395-3400
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume7
Issue number17
DOIs
StatePublished - Sep 1 2016

Fingerprint

Boron
Graphite
Isotopes
Graphene
Protons
Monolayers
Permeation
permeability
graphene
boron
isotopes
analogs
protons
Nitrates
nitrates
Reaction rates
isotope separation
Rate constants
reaction kinetics
fragments

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Differential Permeability of Proton Isotopes through Graphene and Graphene Analogue Monolayer. / Zhang, Qiuju; Ju, Minggang; Chen, Liang; Zeng, Xiao C.

In: Journal of Physical Chemistry Letters, Vol. 7, No. 17, 01.09.2016, p. 3395-3400.

Research output: Contribution to journalArticle

@article{3a3ae46006584814a75412d5f333901a,
title = "Differential Permeability of Proton Isotopes through Graphene and Graphene Analogue Monolayer",
abstract = "Two-dimensional (2D) monolayer nanomaterials can be exploited as the thinnest membrane with distinct differential sieving properties for proton isotopes. Motivated from the experimental evidence of differential sieving proton isotopes through graphene and hexagonal boron nitrate (h-BN) monolayer, we compute the kinetic barrier of isotope H+ and D+ permeation through model graphene and h-BN fragments at the MP2/6-31++G(d,p) level of theory. On the basis of the ratio of tunneling reaction rate constant, the isotope separation ratio of H+/D+ and H+/T+ is predicted to be ∼12 and 37, respectively. The tunneling reaction rate constant can be estimated from the zero-point-energy computed at the transition state for the proton isotope permeation though the 2D model systems. We show that the presence of Stone-Wales (55-77) defect in the model graphene fragment can significantly lower the proton permeation barrier by 0.55 eV. With the defect, the ratio of tunneling reaction rate constant of H+/D+ is increased to ∼25. In addition to model graphene and h-BN, we have examined proton permeation capability of α-boron monolayer. We compute the tunneling reaction pathway for H+ through α-boron monolayer using both the climbing nudged elastic band (c-NEB) method and the scanning-path method. Both methods suggest that α-boron monolayer entails a relatively low barrier of ∼0.20 eV for H+ permeation, much lower than that of the model graphene and h-BN fragments. Our studies provide molecular-level insights into the differential permeation of proton isotopes through 2D materials. The methods can be extended to examine isotope separation capability of other 2D materials as well.",
author = "Qiuju Zhang and Minggang Ju and Liang Chen and Zeng, {Xiao C}",
year = "2016",
month = "9",
day = "1",
doi = "10.1021/acs.jpclett.6b01507",
language = "English (US)",
volume = "7",
pages = "3395--3400",
journal = "Journal of Physical Chemistry Letters",
issn = "1948-7185",
publisher = "American Chemical Society",
number = "17",

}

TY - JOUR

T1 - Differential Permeability of Proton Isotopes through Graphene and Graphene Analogue Monolayer

AU - Zhang, Qiuju

AU - Ju, Minggang

AU - Chen, Liang

AU - Zeng, Xiao C

PY - 2016/9/1

Y1 - 2016/9/1

N2 - Two-dimensional (2D) monolayer nanomaterials can be exploited as the thinnest membrane with distinct differential sieving properties for proton isotopes. Motivated from the experimental evidence of differential sieving proton isotopes through graphene and hexagonal boron nitrate (h-BN) monolayer, we compute the kinetic barrier of isotope H+ and D+ permeation through model graphene and h-BN fragments at the MP2/6-31++G(d,p) level of theory. On the basis of the ratio of tunneling reaction rate constant, the isotope separation ratio of H+/D+ and H+/T+ is predicted to be ∼12 and 37, respectively. The tunneling reaction rate constant can be estimated from the zero-point-energy computed at the transition state for the proton isotope permeation though the 2D model systems. We show that the presence of Stone-Wales (55-77) defect in the model graphene fragment can significantly lower the proton permeation barrier by 0.55 eV. With the defect, the ratio of tunneling reaction rate constant of H+/D+ is increased to ∼25. In addition to model graphene and h-BN, we have examined proton permeation capability of α-boron monolayer. We compute the tunneling reaction pathway for H+ through α-boron monolayer using both the climbing nudged elastic band (c-NEB) method and the scanning-path method. Both methods suggest that α-boron monolayer entails a relatively low barrier of ∼0.20 eV for H+ permeation, much lower than that of the model graphene and h-BN fragments. Our studies provide molecular-level insights into the differential permeation of proton isotopes through 2D materials. The methods can be extended to examine isotope separation capability of other 2D materials as well.

AB - Two-dimensional (2D) monolayer nanomaterials can be exploited as the thinnest membrane with distinct differential sieving properties for proton isotopes. Motivated from the experimental evidence of differential sieving proton isotopes through graphene and hexagonal boron nitrate (h-BN) monolayer, we compute the kinetic barrier of isotope H+ and D+ permeation through model graphene and h-BN fragments at the MP2/6-31++G(d,p) level of theory. On the basis of the ratio of tunneling reaction rate constant, the isotope separation ratio of H+/D+ and H+/T+ is predicted to be ∼12 and 37, respectively. The tunneling reaction rate constant can be estimated from the zero-point-energy computed at the transition state for the proton isotope permeation though the 2D model systems. We show that the presence of Stone-Wales (55-77) defect in the model graphene fragment can significantly lower the proton permeation barrier by 0.55 eV. With the defect, the ratio of tunneling reaction rate constant of H+/D+ is increased to ∼25. In addition to model graphene and h-BN, we have examined proton permeation capability of α-boron monolayer. We compute the tunneling reaction pathway for H+ through α-boron monolayer using both the climbing nudged elastic band (c-NEB) method and the scanning-path method. Both methods suggest that α-boron monolayer entails a relatively low barrier of ∼0.20 eV for H+ permeation, much lower than that of the model graphene and h-BN fragments. Our studies provide molecular-level insights into the differential permeation of proton isotopes through 2D materials. The methods can be extended to examine isotope separation capability of other 2D materials as well.

UR - http://www.scopus.com/inward/record.url?scp=84984911071&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84984911071&partnerID=8YFLogxK

U2 - 10.1021/acs.jpclett.6b01507

DO - 10.1021/acs.jpclett.6b01507

M3 - Article

VL - 7

SP - 3395

EP - 3400

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 17

ER -