Effect of Intercalated Metals on the Electrocatalytic Activity of 1T-MoS 2 for the Hydrogen Evolution Reaction
- Temple Univ., Philadelphia, PA (United States). Dept. of Chemistry, and Center for Computational Design of Functional Layered Materials (CCDM)
- Temple Univ., Philadelphia, PA (United States). Dept. of Chemistry, Center for Computational Design of Functional Layered Materials (CCDM)
- Temple Univ., Philadelphia, PA (United States). Dept. of Chemistry
- Temple Univ., Philadelphia, PA (United States). Dept. of Chemistry, Center for Computational Design of Functional Layered Materials (CCDM), and Inst. for Computational Molecular Science
- Temple Univ., Philadelphia, PA (United States). Dept. of Physics, Center for Computational Design of Functional Layered Materials (CCDM)
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 $$ΔG_H$$ 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.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for the Computational Design of Functional Layered Materials (CCDM)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012575
- OSTI ID:
- 1470020
- Journal Information:
- ACS Energy Letters, Vol. 3, Issue 1; Related Information: CCDM partners with Temple University (lead); Brookhaven National Laboratory; Drexel University; Duke University; North Carolina State University; Northeastern University; Princeton University; Rice University; University of Pennsylvania; ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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