Metallic Iron–Nickel Sulfide Ultrathin Nanosheets As a Highly Active Electrocatalyst for Hydrogen Evolution Reaction in Acidic Media
Abstract
We report on the synthesis of iron-nickel sulfide (INS) ultrathin nanosheets by topotactic conversion from a hydroxide precursor. The INS nanosheets exhibit excellent activity and stability in strong acidic solutions as a hydrogen evolution reaction (HER) catalyst, lending an attractive alternative to the Pt catalyst. The metallic α-INS nanosheets show an even lower overpotential of 105 mV at 10 mA/cm(2) and a smaller Tafel slope of 40 mV/dec. With the help of DFT calculations, the high specific surface area, facile ion transport and charge transfer, abundant electrochemical active sites, suitable H(+) adsorption, and H2 formation kinetics and energetics are proposed to contribute to the high activity of the INS ultrathin nanosheets toward HER.
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The charge transfer resistance (Rct) of CoP-400 is much lower than that of the other CoP aerogel catalysts.
“the charge transfer resistance (Rct) value of CoP-400 is much lower (Figure 4c), indicating the rapid electron transfer process and catalytic kinetics of CoP-400”
From Sub‐1.5 nm Ultrathin CoP Nanosheet Aerogel: Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH Values (2018) · cites this paper as [21]
2D CoP nanosheets are more feasible for enhancing HER catalytic activity because 2D nanostructures expose catalytically active sites that promote interfacial charge transfer.
“Among them, 2D CoP nanosheets are more feasible to enhance HER catalytic activity, since the 2D nanostructures enable to expose catalytically active sites which promote interfacial charge transfer.”
From Sub‐1.5 nm Ultrathin CoP Nanosheet Aerogel: Efficient Electrocatalyst for Hydrogen Evolution Reaction at All pH Values (2018) · cites this paper as [21]
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Recent Advances in Electrocatalytic Hydrogen Evolution Using Nanoparticles
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- Authors
- Long, X., Li, G., Wang, Z., Zhu, H., Zhang, T., Xiao, S., Guo, W., & Yang, S.
- Affiliations
- Hong Kong University of Science and Technology (HK)
- China University of Petroleum, East China (CN)
- Corresponding author
- Yang, Shihe
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-09-14
- Volume
- 137
- Issue
- 37
- Pages
- 11900-11903
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1267917630
- Cited by
- 657
- References
- 5
- Citations by year
- 2026: 11 · 2025: 26 · 2024: 33 · 2023: 26 · 2022: 56 · 2021: 58 · 2020: 76 · 2019: 102 · 2018: 104 · 2017: 111 · 2016: 53 · 2015: 1
- FWCI
- 26.52
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
- Funders
- Research Grants Council, University Grants Committee, Hong Kong (HKUST 60651, N_HKUST610/14)
- National Natural Science Foundation of China (N_HKUST610/14)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Hydrogen Storage and Materials
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Keywords
- iron-nickel sulfide, ultrathin nanosheets, hydrogen evolution reaction, electrocatalysts, acidic media, topotactic conversion, platinum-free catalysts, overpotential, Tafel slope, H* adsorption, charge transfer, DFT calculations
- MeSH terms
- Catalysis, Electrochemistry, Hydrogen, Hydrogen-Ion Concentration, Iron, Models, Molecular, Molecular Conformation, Nickel, Nanostructures
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