Electron transfer kinetics on natural crystals of MoS2 and graphiteCitation formats

  • External authors:
  • Peter Toth
  • Hollie Patten
  • Stephen Worrall
  • Andrew Rodgers
  • Ernie Hill
  • Konstantin Novoselov
  • Thanasis Georgiou
  • Liam Britnell

Standard

Electron transfer kinetics on natural crystals of MoS2 and graphite. / Velicky, Matej; Bissett, Mark; Toth, Peter; Patten, Hollie; Worrall, Stephen; Rodgers, Andrew; Hill, Ernie; Kinloch, Ian A; Novoselov, Konstantin; Georgiou, Thanasis; Britnell, Liam; Dryfe, Robert.

In: Physical Chemistry Chemical Physics, Vol. 17, No. 27, 12.06.2015, p. 17844-17853.

Research output: Contribution to journalArticle

Harvard

Velicky, M, Bissett, M, Toth, P, Patten, H, Worrall, S, Rodgers, A, Hill, E, Kinloch, IA, Novoselov, K, Georgiou, T, Britnell, L & Dryfe, R 2015, 'Electron transfer kinetics on natural crystals of MoS2 and graphite' Physical Chemistry Chemical Physics, vol. 17, no. 27, pp. 17844-17853. https://doi.org/10.1039/c5cp02490k

APA

Velicky, M., Bissett, M., Toth, P., Patten, H., Worrall, S., Rodgers, A., ... Dryfe, R. (2015). Electron transfer kinetics on natural crystals of MoS2 and graphite. Physical Chemistry Chemical Physics, 17(27), 17844-17853. https://doi.org/10.1039/c5cp02490k

Vancouver

Velicky M, Bissett M, Toth P, Patten H, Worrall S, Rodgers A et al. Electron transfer kinetics on natural crystals of MoS2 and graphite. Physical Chemistry Chemical Physics. 2015 Jun 12;17(27):17844-17853. https://doi.org/10.1039/c5cp02490k

Author

Velicky, Matej ; Bissett, Mark ; Toth, Peter ; Patten, Hollie ; Worrall, Stephen ; Rodgers, Andrew ; Hill, Ernie ; Kinloch, Ian A ; Novoselov, Konstantin ; Georgiou, Thanasis ; Britnell, Liam ; Dryfe, Robert. / Electron transfer kinetics on natural crystals of MoS2 and graphite. In: Physical Chemistry Chemical Physics. 2015 ; Vol. 17, No. 27. pp. 17844-17853.

Bibtex

@article{676ba053733c419f841b071b0d50023b,
title = "Electron transfer kinetics on natural crystals of MoS2 and graphite",
abstract = "Here, we evaluate the electrochemical performance of sparsely studied natural crystals of molybdenite and graphite, which have increasingly been used for fabrication of next generation monolayer molybdenum disulphide and graphene energy storage devices. Heterogeneous electron transfer kinetics of several redox mediators, including Fe(CN)(6)(3-/4-), Ru(NH3)(6)(3+/2+) and IrCl62-/3- are determined using voltammetry in a micro-droplet cell. The kinetics on both materials are studied as a function of surface defectiveness, surface ageing, applied potential and illumination. We find that the basal planes of both natural MoS2 and graphite show significant electroactivity, but a large decrease in electron transfer kinetics is observed on atmosphere-aged surfaces in comparison to in situ freshly cleaved surfaces of both materials. This is attributed to surface oxidation and adsorption of airborne contaminants at the surface exposed to an ambient environment. In contrast to semimetallic graphite, the electrode kinetics on semiconducting MoS2 are strongly dependent on the surface illumination and applied potential. Furthermore, while visibly present defects/cracks do not significantly affect the response of graphite, the kinetics on MoS2 systematically accelerate with small increase in disorder. These findings have direct implications for use of MoS2 and graphene/graphite as electrode materials in electrochemistry-related applications.",
author = "Matej Velicky and Mark Bissett and Peter Toth and Hollie Patten and Stephen Worrall and Andrew Rodgers and Ernie Hill and Kinloch, {Ian A} and Konstantin Novoselov and Thanasis Georgiou and Liam Britnell and Robert Dryfe",
note = "Electronic supplementary information (ESI) available: AFM measurement, electron transfer kinetics determination, and XPS and EDX spectroscopy of the aged and freshly cleaved MoS2 surface; video of the in situ cleaving method. See DOI: 10.1039/c5cp02490k",
year = "2015",
month = "6",
day = "12",
doi = "10.1039/c5cp02490k",
language = "English",
volume = "17",
pages = "17844--17853",
journal = "Physical Chemistry Chemical Physics: high quality research in physical chemistry, chemical physics and biophysical chemistry",
issn = "1463-9076",
publisher = "Royal Society of Chemistry",
number = "27",

}

RIS

TY - JOUR

T1 - Electron transfer kinetics on natural crystals of MoS2 and graphite

AU - Velicky, Matej

AU - Bissett, Mark

AU - Toth, Peter

AU - Patten, Hollie

AU - Worrall, Stephen

AU - Rodgers, Andrew

AU - Hill, Ernie

AU - Kinloch, Ian A

AU - Novoselov, Konstantin

AU - Georgiou, Thanasis

AU - Britnell, Liam

AU - Dryfe, Robert

N1 - Electronic supplementary information (ESI) available: AFM measurement, electron transfer kinetics determination, and XPS and EDX spectroscopy of the aged and freshly cleaved MoS2 surface; video of the in situ cleaving method. See DOI: 10.1039/c5cp02490k

PY - 2015/6/12

Y1 - 2015/6/12

N2 - Here, we evaluate the electrochemical performance of sparsely studied natural crystals of molybdenite and graphite, which have increasingly been used for fabrication of next generation monolayer molybdenum disulphide and graphene energy storage devices. Heterogeneous electron transfer kinetics of several redox mediators, including Fe(CN)(6)(3-/4-), Ru(NH3)(6)(3+/2+) and IrCl62-/3- are determined using voltammetry in a micro-droplet cell. The kinetics on both materials are studied as a function of surface defectiveness, surface ageing, applied potential and illumination. We find that the basal planes of both natural MoS2 and graphite show significant electroactivity, but a large decrease in electron transfer kinetics is observed on atmosphere-aged surfaces in comparison to in situ freshly cleaved surfaces of both materials. This is attributed to surface oxidation and adsorption of airborne contaminants at the surface exposed to an ambient environment. In contrast to semimetallic graphite, the electrode kinetics on semiconducting MoS2 are strongly dependent on the surface illumination and applied potential. Furthermore, while visibly present defects/cracks do not significantly affect the response of graphite, the kinetics on MoS2 systematically accelerate with small increase in disorder. These findings have direct implications for use of MoS2 and graphene/graphite as electrode materials in electrochemistry-related applications.

AB - Here, we evaluate the electrochemical performance of sparsely studied natural crystals of molybdenite and graphite, which have increasingly been used for fabrication of next generation monolayer molybdenum disulphide and graphene energy storage devices. Heterogeneous electron transfer kinetics of several redox mediators, including Fe(CN)(6)(3-/4-), Ru(NH3)(6)(3+/2+) and IrCl62-/3- are determined using voltammetry in a micro-droplet cell. The kinetics on both materials are studied as a function of surface defectiveness, surface ageing, applied potential and illumination. We find that the basal planes of both natural MoS2 and graphite show significant electroactivity, but a large decrease in electron transfer kinetics is observed on atmosphere-aged surfaces in comparison to in situ freshly cleaved surfaces of both materials. This is attributed to surface oxidation and adsorption of airborne contaminants at the surface exposed to an ambient environment. In contrast to semimetallic graphite, the electrode kinetics on semiconducting MoS2 are strongly dependent on the surface illumination and applied potential. Furthermore, while visibly present defects/cracks do not significantly affect the response of graphite, the kinetics on MoS2 systematically accelerate with small increase in disorder. These findings have direct implications for use of MoS2 and graphene/graphite as electrode materials in electrochemistry-related applications.

U2 - 10.1039/c5cp02490k

DO - 10.1039/c5cp02490k

M3 - Article

VL - 17

SP - 17844

EP - 17853

JO - Physical Chemistry Chemical Physics: high quality research in physical chemistry, chemical physics and biophysical chemistry

JF - Physical Chemistry Chemical Physics: high quality research in physical chemistry, chemical physics and biophysical chemistry

SN - 1463-9076

IS - 27

ER -