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 language | English |
|---|---|
| Article number | 11857 |
| Journal | Nature Communications |
| Volume | 7 |
| DOIs | |
| Publication status | Published - Jun 10 2016 |
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ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Chemistry(all)
- Physics and Astronomy(all)
Cite this
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 journal › Article
}
TY - JOUR
T1 - Efficient hydrogen evolution in transition metal dichalcogenides via a simple one-step hydrazine reaction
AU - Cummins, Dustin R.
AU - Martinez, Ulises
AU - Sherehiy, Andriy
AU - Kappera, Rajesh
AU - Martinez-Garcia, Alejandro
AU - Schulze, Roland K.
AU - Jasinski, Jacek
AU - Zhang, Jing
AU - Gupta, Ram K.
AU - Lou, Jun
AU - Chhowalla, Manish
AU - Sumanasekera, Gamini
AU - Mohite, Aditya D.
AU - Sunkara, Mahendra K.
AU - Gupta, Gautam
PY - 2016/6/10
Y1 - 2016/6/10
N2 - 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.
AB - 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.
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U2 - 10.1038/ncomms11857
DO - 10.1038/ncomms11857
M3 - Article
VL - 7
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 11857
ER -