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

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, Gamini Sumanasekera, Aditya D. Mohite, Mahendra K. Sunkara, Gautam Gupta

Research output: Contribution to journalArticle

90 Citations (Scopus)

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 â '1/4100 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 MoO x core in the core-shell nanowires, which leads to improved electrocatalytic performance.

Original languageEnglish
Article number11857
JournalNature Communications
Volume7
DOIs
Publication statusPublished - Jun 10 2016

Fingerprint

hydrazine
Nanowires
hydrazines
molybdenum disulfides
Transition metals
Hydrogen
nanowires
Metals
transition metals
Precious metals
noble metals
hydrogen
Electrocatalysis
disulfides
Platinum
durability
Durability
platinum
Current density
Doping (additives)

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Physics and Astronomy(all)

Cite this

Cummins, D. R., Martinez, U., Sherehiy, A., Kappera, R., Martinez-Garcia, A., Schulze, R. K., ... Gupta, G. (2016). Efficient hydrogen evolution in transition metal dichalcogenides via a simple one-step hydrazine reaction. Nature Communications, 7, [11857]. https://doi.org/10.1038/ncomms11857

Efficient hydrogen evolution in transition metal dichalcogenides via a simple one-step hydrazine reaction. / Cummins, Dustin R.; Martinez, Ulises; Sherehiy, Andriy; Kappera, Rajesh; Martinez-Garcia, Alejandro; Schulze, Roland K.; Jasinski, Jacek; Zhang, Jing; Gupta, Ram K.; Lou, Jun; Chhowalla, Manish; Sumanasekera, Gamini; Mohite, Aditya D.; Sunkara, Mahendra K.; Gupta, Gautam.

In: Nature Communications, Vol. 7, 11857, 10.06.2016.

Research output: Contribution to journalArticle

Cummins, DR, Martinez, U, Sherehiy, A, Kappera, R, Martinez-Garcia, A, Schulze, RK, Jasinski, J, Zhang, J, Gupta, RK, Lou, J, Chhowalla, M, Sumanasekera, G, Mohite, AD, Sunkara, MK & Gupta, G 2016, 'Efficient hydrogen evolution in transition metal dichalcogenides via a simple one-step hydrazine reaction', Nature Communications, vol. 7, 11857. https://doi.org/10.1038/ncomms11857
Cummins DR, Martinez U, Sherehiy A, Kappera R, Martinez-Garcia A, Schulze RK et al. Efficient hydrogen evolution in transition metal dichalcogenides via a simple one-step hydrazine reaction. Nature Communications. 2016 Jun 10;7. 11857. https://doi.org/10.1038/ncomms11857
Cummins, Dustin R. ; Martinez, Ulises ; Sherehiy, Andriy ; Kappera, Rajesh ; Martinez-Garcia, Alejandro ; Schulze, Roland K. ; Jasinski, Jacek ; Zhang, Jing ; Gupta, Ram K. ; Lou, Jun ; Chhowalla, Manish ; Sumanasekera, Gamini ; Mohite, Aditya D. ; Sunkara, Mahendra K. ; Gupta, Gautam. / Efficient hydrogen evolution in transition metal dichalcogenides via a simple one-step hydrazine reaction. In: Nature Communications. 2016 ; Vol. 7.
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