Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74

Research output: Contribution to journal › Article › Research › peer review

Authors

  • Ali Javed
  • Ina Strauss
  • Hana Bunzen
  • Jürgen Caro
  • Michael Tiemann

Research Organisations

External Research Organisations

  • Paderborn University
  • University of Augsburg
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Details

Original languageEnglish
Article number1263
Pages (from-to)1-9
Number of pages9
JournalNanomaterials
Volume10
Issue number7
Early online date28 Jun 2020
Publication statusPublished - Jul 2020

Abstract

Large Co-MOF-74 crystals of a few hundred micrometers were prepared by solvothermal synthesis, and their structure and morphology were characterized by scanning electron microscopy (SEM), IR, and Raman spectroscopy. The hydrothermal stability of the material up to 60 °C at 93% relative humidity was verified by temperature-dependent XRD. Proton conductivity was studied by impedance spectroscopy, using a single crystal. By varying the relative humidity (70–95%), temperature (21–60 °C), and orientation of the crystal relative to the electrical potential, it was found that proton conduction occurs predominantly through the linear, unidirectional (1D) micropore channels of Co-MOF-74, and that water molecules inside the channels are responsible for the proton mobility by a Grotthuss-type mechanism.

Keywords

    Anisotropy, Co-MOF-74, Fuel cell, Impedance spectroscopy, Metal-organic framework, Proton conductivity, Single crystal

ASJC Scopus subject areas

Cite this

Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74. / Javed, Ali; Strauss, Ina; Bunzen, Hana et al.
In: Nanomaterials, Vol. 10, No. 7, 1263, 07.2020, p. 1-9.

Research output: Contribution to journal › Article › Research › peer review

Javed, A, Strauss, I, Bunzen, H, Caro, J & Tiemann, M 2020, 'Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74', Nanomaterials, vol. 10, no. 7, 1263, pp. 1-9. https://doi.org/10.3390/nano10071263
Javed, A., Strauss, I., Bunzen, H., Caro, J., & Tiemann, M. (2020). Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74. Nanomaterials, 10(7), 1-9. Article 1263. https://doi.org/10.3390/nano10071263
Javed A, Strauss I, Bunzen H, Caro J, Tiemann M. Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74. Nanomaterials. 2020 Jul;10(7):1-9. 1263. Epub 2020 Jun 28. doi: 10.3390/nano10071263
Javed, Ali ; Strauss, Ina ; Bunzen, Hana et al. / Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74. In: Nanomaterials. 2020 ; Vol. 10, No. 7. pp. 1-9.
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title = "Humidity-Mediated Anisotropic Proton Conductivity through the 1D Channels of Co-MOF-74",
abstract = "Large Co-MOF-74 crystals of a few hundred micrometers were prepared by solvothermal synthesis, and their structure and morphology were characterized by scanning electron microscopy (SEM), IR, and Raman spectroscopy. The hydrothermal stability of the material up to 60 °C at 93% relative humidity was verified by temperature-dependent XRD. Proton conductivity was studied by impedance spectroscopy, using a single crystal. By varying the relative humidity (70–95%), temperature (21–60 °C), and orientation of the crystal relative to the electrical potential, it was found that proton conduction occurs predominantly through the linear, unidirectional (1D) micropore channels of Co-MOF-74, and that water molecules inside the channels are responsible for the proton mobility by a Grotthuss-type mechanism.",
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note = "Funding Information: Acknowledgments: We thank Alexander Reitz for providing confocal laser microscopic images and Alexander Mundstock for fruitful and supportive discussion. I.S. thanks the Graduierten Akademie of the Leibniz University Hannover for financial support. Funding Information: Funding: This research was funded by Deutsche Forschungsgemeinschaft (DFG) within the priority program 1928: Coordination Networks: Building Blocks for Functional Systems, COORNETs. ",
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AU - Bunzen, Hana

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N1 - Funding Information: Acknowledgments: We thank Alexander Reitz for providing confocal laser microscopic images and Alexander Mundstock for fruitful and supportive discussion. I.S. thanks the Graduierten Akademie of the Leibniz University Hannover for financial support. Funding Information: Funding: This research was funded by Deutsche Forschungsgemeinschaft (DFG) within the priority program 1928: Coordination Networks: Building Blocks for Functional Systems, COORNETs.

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