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Efficient hydrogen evolution in transition metal dichalcogenides via a simple one-step hydrazine reaction

Author

Listed:
  • Dustin R. Cummins

    (Materials Physics and Applications (MPA-11), Los Alamos National Laboratory
    Chemical Engineering and Conn Center for Renewable Energy Research, University of Louisville)

  • Ulises Martinez

    (Materials Physics and Applications (MPA-11), Los Alamos National Laboratory)

  • Andriy Sherehiy

    (Chemical Engineering and Conn Center for Renewable Energy Research, University of Louisville)

  • Rajesh Kappera

    (Materials Physics and Applications (MPA-11), Los Alamos National Laboratory
    Materials Science and Engineering, Rutgers University)

  • Alejandro Martinez-Garcia

    (Chemical Engineering and Conn Center for Renewable Energy Research, University of Louisville)

  • Roland K. Schulze

    (Materials Science and Technology (MST-6), Los Alamos National Laboratory)

  • Jacek Jasinski

    (Chemical Engineering and Conn Center for Renewable Energy Research, University of Louisville)

  • Jing Zhang

    (Materials Science and NanoEngineering, Rice University)

  • Ram K. Gupta

    (Chemistry, Pittsburg State University)

  • Jun Lou

    (Materials Science and NanoEngineering, Rice University)

  • Manish Chhowalla

    (Materials Science and Engineering, Rutgers University)

  • Gamini Sumanasekera

    (Chemical Engineering and Conn Center for Renewable Energy Research, University of Louisville)

  • Aditya D. Mohite

    (Materials Physics and Applications (MPA-11), Los Alamos National Laboratory)

  • Mahendra K. Sunkara

    (Chemical Engineering and Conn Center for Renewable Energy Research, University of Louisville)

  • Gautam Gupta

    (Materials Physics and Applications (MPA-11), Los Alamos National Laboratory)

Abstract

Hydrogen evolution reaction is catalysed efficiently with precious metals, such as platinum; however, transition metal dichalcogenides have recently emerged as a promising class of materials for electrocatalysis, but these materials still have low activity and durability when compared with precious metals. Here we report a simple one-step scalable approach, where MoOx/MoS2 core-shell nanowires and molybdenum disulfide sheets are exposed to dilute aqueous hydrazine at room temperature, which results in marked improvement in electrocatalytic performance. The nanowires exhibit ∼100 mV improvement in overpotential following exposure to dilute hydrazine, while also showing a 10-fold increase in current density and a significant change in Tafel slope. In situ electrical, gate-dependent measurements and spectroscopic investigations reveal that hydrazine acts as an electron dopant in molybdenum disulfide, increasing its conductivity, while also reducing the MoOx core in the core-shell nanowires, which leads to improved electrocatalytic performance.

Suggested Citation

  • Dustin R. Cummins & Ulises Martinez & Andriy Sherehiy & Rajesh Kappera & Alejandro Martinez-Garcia & Roland K. Schulze & Jacek Jasinski & Jing Zhang & Ram K. Gupta & Jun Lou & Manish Chhowalla & Gamin, 2016. "Efficient hydrogen evolution in transition metal dichalcogenides via a simple one-step hydrazine reaction," Nature Communications, Nature, vol. 7(1), pages 1-10, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11857
    DOI: 10.1038/ncomms11857
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