Highly Active and Stable Hybrid Catalyst of Cobalt-Doped FeS2 Nanosheets–Carbon Nanotubes for Hydrogen Evolution Reaction
Abstract
Hydrogen evolution reaction (HER) from water through electrocatalysis using cost-effective materials to replace precious Pt catalysts holds great promise for clean energy technologies. In this work we developed a highly active and stable catalyst containing Co doped earth abundant iron pyrite FeS(2) nanosheets hybridized with carbon nanotubes (Fe(1-x)CoxS(2)/CNT hybrid catalysts) for HER in acidic solutions. The pyrite phase of Fe(1-x)CoxS(2)/CNT was characterized by powder X-ray diffraction and absorption spectroscopy. Electrochemical measurements showed a low overpotential of ∼0.12 V at 20 mA/cm(2), small Tafel slope of ∼46 mV/decade, and long-term durability over 40 h of HER operation using bulk quantities of Fe(0.9)Co(0.1)S(2)/CNT hybrid catalysts at high loadings (∼7 mg/cm(2)). Density functional theory calculation revealed that the origin of high catalytic activity stemmed from a large reduction of the kinetic energy barrier of H atom adsorption on FeS(2) surface upon Co doping in the iron pyrite structure. It is also found that the high HER catalytic activity of Fe(0.9)Co(0.1)S(2) hinges on the hybridization with CNTs to impart strong heteroatomic interactions between CNT and Fe(0.9)Co(0.1)S(2). This work produces the most active HER catalyst based on iron pyrite, suggesting a scalable, low cost, and highly efficient catalyst for hydrogen generation.
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Transition metal dichalcogenides (TMDs) are considered excellent catalytic materials that may replace precious metal catalysts due to their similar electronic structure to precious metals and outstanding catalytic performance.
“Especially, transition metal dichalcogenides (TMDs) are considered excellent catalytic materials that may replace precious metal catalysts due to their similar electronic structure to precious metals and outstanding catalytic performance [11, 12].”
From Molybdenum disulfide supported on chitin carbon aerogels as an efficient and stable hydrogen evolution electrocatalyst (2025) · cites this paper as [12]
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- Authors
- Wang, D.-Y., Gong, M., Chou, H.-L., Pan, C.-J., Chen, H.-A., Wu, Y., Lin, M.-C., Guan, M., Yang, J., Chen, C.-W., Wang, Y.-L., Hwang, B.-J., Chen, C.-C., & Dai, H.
- Affiliations
- National Taiwan Normal University (TW)
- Stanford University (US)
- National Taiwan University of Science and Technology (TW)
- National Taiwan University (TW)
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Institute of Atomic and Molecular Sciences, Academia Sinica (TW)
- Corresponding author
- Hwang, Bing-Joe
- Chen, Chia-Chun
- Dai, Hongjie
- ORCID
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-01-27
- Volume
- 137
- Issue
- 4
- Pages
- 1587-1592
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2079493928
- Cited by
- 874
- References
- 8
- Citations by year
- 2026: 24 · 2025: 34 · 2024: 41 · 2023: 42 · 2022: 51 · 2021: 75 · 2020: 93 · 2019: 131 · 2018: 128 · 2017: 122 · 2016: 98 · 2015: 34
- FWCI
- 37.64
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- Funders
- U.S. Department of Energy
- Stanford University
- Precourt Institute for Energy, Stanford University
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Keywords
- hydrogen evolution reaction, pyrite, carbon nanotubes, hybrid electrocatalyst, acidic water splitting, earth-abundant catalysts, platinum-free catalysts, catalyst stability, density functional theory
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