Effect of Intercalated Metals on the Electrocatalytic
Activity of 1T-MoS2 for the Hydrogen Evolution Reaction
Version 2 2017-11-17, 21:08
Version 1 2017-11-17, 15:20
Posted on 2017-11-17 - 21:08
We
show that intercalation of cations (Na+, Ca2+, Ni2+, and Co2+) into the interlayer region
of 1T-MoS2 is an effective strategy to lower the overpotential
for the hydrogen evolution reaction (HER). In acidic media the onset
potential for 1T-MoS2 with intercalated ions is lowered
by ∼60 mV relative to that for pristine 1T-MoS2 (onset
of ∼180 mV). Density functional theory (DFT) calculations show
a lowering in the Gibbs free energy for H-adsorption (ΔGH) on these intercalated structures relative
to intercalant-free 1T-MoS2. The DFT calculations suggest
that Na+ intercalation results in a ΔGH close to zero. Consistent with calculation, experiments
show that the intercalation of Na+ ions into the interlayer
region of 1T-MoS2 results in the lowest overpotential for
the HER.
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Attanayake, Nuwan
H.; Thenuwara, Akila C.; Patra, Abhirup; Aulin, Yaroslav V.; Tran, Thi M.; Chakraborty, Himanshu; et al. (2017). Effect of Intercalated Metals on the Electrocatalytic
Activity of 1T-MoS2 for the Hydrogen Evolution Reaction. ACS Publications. Collection. https://doi.org/10.1021/acsenergylett.7b00865
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AUTHORS (10)
NA
Nuwan
H. Attanayake
AT
Akila C. Thenuwara
AP
Abhirup Patra
YA
Yaroslav V. Aulin
TT
Thi M. Tran
HC
Himanshu Chakraborty
EB
Eric Borguet
MK
Michael L. Klein
JP
John P. Perdew
DS
Daniel R. Strongin