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Effect of Intercalated Metals on the Electrocatalytic Activity of 1T-MoS2 for the Hydrogen Evolution Reaction AITranslate

Nuwan H. Attanayake; Akila C. Thenuwara; Abhirup Patra; Yaroslav V. Aulin; Thi M. Tran; Himanshu Chakraborty; Eric Borguet; Michael L. Klein; John P. Perdew; Daniel R. Strongin;
Temple University; Temple University; Temple University; Temple University; Temple University; Temple University; Temple University; Temple University; Temple University; Temple University
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Abstract AITranslate

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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DOI：https://doi.org/10.1021/acsenergylett.7b00865

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Citation Information:

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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GB/T 7714-2015 [1] Nuwan H. Attanayake, Akila C. Thenuwara, Abhirup Patra, et al. ACS Energy Letters, 2018(3). DOI:10.1021/acsenergylett.7b00865.
MLA [1] Nuwan H. Attanayake, et al., ACS Energy Letters, no. 3, 2018, https://doi.org/10.1021/acsenergylett.7b00865.
APA [1] Nuwan H. Attanayake, Akila C. Thenuwara, Abhirup Patra, Yaroslav V. Aulin, Thi M. Tran, Himanshu Chakraborty, Eric Borguet, Michael L. Klein, John P. Perdew, & Daniel R. Strongin. (2018). ACS Energy Letters(3). https://doi.org/10.1021/acsenergylett.7b00865
IEEE [1] Nuwan H. Attanayake, Akila C. Thenuwara, Abhirup Patra, Yaroslav V. Aulin, Thi M. Tran, Himanshu Chakraborty, Eric Borguet, Michael L. Klein, John P. Perdew, and Daniel R. Strongin, ACS Energy Letters, no. 3, 2018, doi: 10.1021/acsenergylett.7b00865.