Nanoscale Chevrel Phase Mo6S8 Prepared by a Molecular Precursor Approach for Highly Efficient Electrocatalysis of the Hydrogen Evolution Reaction in Acidic MediaCitation formats

  • External authors:
  • Amr Elgendy
  • Athanasios Papaderakis
  • Conor Byrne
  • Zhaozong Sun
  • Jeppe V. Lauritsen
  • Elliot P. C. Higgins
  • Andinet Ejigu

Standard

Nanoscale Chevrel Phase Mo6S8 Prepared by a Molecular Precursor Approach for Highly Efficient Electrocatalysis of the Hydrogen Evolution Reaction in Acidic Media. / Elgendy, Amr; Papaderakis, Athanasios; Byrne, Conor; Sun, Zhaozong; Lauritsen, Jeppe V.; Higgins, Elliot P. C.; Ejigu, Andinet ; Cernik, Robert; Walton, Alex; Lewis, David; Dryfe, Robert.

In: ACS Applied Energy Materials, 30.09.2021.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Elgendy, A., Papaderakis, A., Byrne, C., Sun, Z., Lauritsen, J. V., Higgins, E. P. C., Ejigu, A., Cernik, R., Walton, A., Lewis, D., & Dryfe, R. (Accepted/In press). Nanoscale Chevrel Phase Mo6S8 Prepared by a Molecular Precursor Approach for Highly Efficient Electrocatalysis of the Hydrogen Evolution Reaction in Acidic Media. ACS Applied Energy Materials.

Vancouver

Elgendy A, Papaderakis A, Byrne C, Sun Z, Lauritsen JV, Higgins EPC et al. Nanoscale Chevrel Phase Mo6S8 Prepared by a Molecular Precursor Approach for Highly Efficient Electrocatalysis of the Hydrogen Evolution Reaction in Acidic Media. ACS Applied Energy Materials. 2021 Sep 30.

Author

Elgendy, Amr ; Papaderakis, Athanasios ; Byrne, Conor ; Sun, Zhaozong ; Lauritsen, Jeppe V. ; Higgins, Elliot P. C. ; Ejigu, Andinet ; Cernik, Robert ; Walton, Alex ; Lewis, David ; Dryfe, Robert. / Nanoscale Chevrel Phase Mo6S8 Prepared by a Molecular Precursor Approach for Highly Efficient Electrocatalysis of the Hydrogen Evolution Reaction in Acidic Media. In: ACS Applied Energy Materials. 2021.

Bibtex

@article{3c4b492ce18d4b2c8a119d2ccb7166a8,
title = "Nanoscale Chevrel Phase Mo6S8 Prepared by a Molecular Precursor Approach for Highly Efficient Electrocatalysis of the Hydrogen Evolution Reaction in Acidic Media",
abstract = "Developing a simple, safe and efficient route for the preparation of nanoparticulate ternary Chevrel phases MxMo6S8 (CPs; where M = metal) is of great interest because of their applications in energy conversion and storage technologies. Currently, the wide use of these materials is restricted by the prolonged reaction time, the high energy demands required for their synthesis, the complexity of the preparation process and the ambiguity in the size of the resultant particles. Herein, we report a simple, efficient and controllable molecular precursor approach for the synthesis of nanoscale CP without the use of hydrogen gas as a reducing agent. A mixture of precursors based on molybdenum and copper dithiocarbamate complexes were subjected to thermolysis in the presence of finely divided molybdenum to furnish the copper CP, Cu2Mo6S8. The successful formation of the Cu2Mo6S8 CP is confirmed by X-ray diffraction analysis and Raman spectroscopy, while the surface chemistry of the material was examined by X-ray photoelectron spectroscopy photon depth profiling via tuneable synchrotron radiation. Microscopic characterisation results demonstrate that the synthesised material has a homogeneous structure at the nanoscale, in contrast to the microparticles obtained from conventional approaches previously reported. The prepared CP was assessed as an electrocatalyst for the hydrogen evolution reaction (HER) in acidic media. Due to its unique nanoscale texturing, the Cu-leached CP, Mo6S8, exhibits a highly promising electrocatalytic activity towards hydrogen evolution with an overpotential required to reach a current density of 10 mA cm-2 equal to 265 mV vs. RHE. The overpotential reduces to 232 mV upon mixing of the catalyst with 20% w/w of high conductivity carbon. It is expected that the proposed synthetic strategy, which represents a facile route to tailored CPs, can be extended to the preparation of versatile, easily tuneable CP Mo6S8-based electrode materials for applications in electrocatalysis.",
author = "Amr Elgendy and Athanasios Papaderakis and Conor Byrne and Zhaozong Sun and Lauritsen, {Jeppe V.} and Higgins, {Elliot P. C.} and Andinet Ejigu and Robert Cernik and Alex Walton and David Lewis and Robert Dryfe",
year = "2021",
month = sep,
day = "30",
language = "English",
journal = "ACS Applied Energy Materials",
issn = "2574-0962",
publisher = "American Chemical Society",

}

RIS

TY - JOUR

T1 - Nanoscale Chevrel Phase Mo6S8 Prepared by a Molecular Precursor Approach for Highly Efficient Electrocatalysis of the Hydrogen Evolution Reaction in Acidic Media

AU - Elgendy, Amr

AU - Papaderakis, Athanasios

AU - Byrne, Conor

AU - Sun, Zhaozong

AU - Lauritsen, Jeppe V.

AU - Higgins, Elliot P. C.

AU - Ejigu, Andinet

AU - Cernik, Robert

AU - Walton, Alex

AU - Lewis, David

AU - Dryfe, Robert

PY - 2021/9/30

Y1 - 2021/9/30

N2 - Developing a simple, safe and efficient route for the preparation of nanoparticulate ternary Chevrel phases MxMo6S8 (CPs; where M = metal) is of great interest because of their applications in energy conversion and storage technologies. Currently, the wide use of these materials is restricted by the prolonged reaction time, the high energy demands required for their synthesis, the complexity of the preparation process and the ambiguity in the size of the resultant particles. Herein, we report a simple, efficient and controllable molecular precursor approach for the synthesis of nanoscale CP without the use of hydrogen gas as a reducing agent. A mixture of precursors based on molybdenum and copper dithiocarbamate complexes were subjected to thermolysis in the presence of finely divided molybdenum to furnish the copper CP, Cu2Mo6S8. The successful formation of the Cu2Mo6S8 CP is confirmed by X-ray diffraction analysis and Raman spectroscopy, while the surface chemistry of the material was examined by X-ray photoelectron spectroscopy photon depth profiling via tuneable synchrotron radiation. Microscopic characterisation results demonstrate that the synthesised material has a homogeneous structure at the nanoscale, in contrast to the microparticles obtained from conventional approaches previously reported. The prepared CP was assessed as an electrocatalyst for the hydrogen evolution reaction (HER) in acidic media. Due to its unique nanoscale texturing, the Cu-leached CP, Mo6S8, exhibits a highly promising electrocatalytic activity towards hydrogen evolution with an overpotential required to reach a current density of 10 mA cm-2 equal to 265 mV vs. RHE. The overpotential reduces to 232 mV upon mixing of the catalyst with 20% w/w of high conductivity carbon. It is expected that the proposed synthetic strategy, which represents a facile route to tailored CPs, can be extended to the preparation of versatile, easily tuneable CP Mo6S8-based electrode materials for applications in electrocatalysis.

AB - Developing a simple, safe and efficient route for the preparation of nanoparticulate ternary Chevrel phases MxMo6S8 (CPs; where M = metal) is of great interest because of their applications in energy conversion and storage technologies. Currently, the wide use of these materials is restricted by the prolonged reaction time, the high energy demands required for their synthesis, the complexity of the preparation process and the ambiguity in the size of the resultant particles. Herein, we report a simple, efficient and controllable molecular precursor approach for the synthesis of nanoscale CP without the use of hydrogen gas as a reducing agent. A mixture of precursors based on molybdenum and copper dithiocarbamate complexes were subjected to thermolysis in the presence of finely divided molybdenum to furnish the copper CP, Cu2Mo6S8. The successful formation of the Cu2Mo6S8 CP is confirmed by X-ray diffraction analysis and Raman spectroscopy, while the surface chemistry of the material was examined by X-ray photoelectron spectroscopy photon depth profiling via tuneable synchrotron radiation. Microscopic characterisation results demonstrate that the synthesised material has a homogeneous structure at the nanoscale, in contrast to the microparticles obtained from conventional approaches previously reported. The prepared CP was assessed as an electrocatalyst for the hydrogen evolution reaction (HER) in acidic media. Due to its unique nanoscale texturing, the Cu-leached CP, Mo6S8, exhibits a highly promising electrocatalytic activity towards hydrogen evolution with an overpotential required to reach a current density of 10 mA cm-2 equal to 265 mV vs. RHE. The overpotential reduces to 232 mV upon mixing of the catalyst with 20% w/w of high conductivity carbon. It is expected that the proposed synthetic strategy, which represents a facile route to tailored CPs, can be extended to the preparation of versatile, easily tuneable CP Mo6S8-based electrode materials for applications in electrocatalysis.

M3 - Article

JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

SN - 2574-0962

ER -