Cited by 1,372Electrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsAdvanced Photocatalysis Techniques

High-Performance Electrocatalysis Using Metallic Cobalt Pyrite (CoS2) Micro- and Nanostructures

Faber, Matthew S., Dziedzic, Rafal, Lukowski, Mark A., Kaiser, Nicholas S., Ding, Qi, Jin, Song·2014·Journal of the American Chemical Society

Abstract

The development of efficient and robust earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) is an ongoing challenge. We report metallic cobalt pyrite (cobalt disulfide, CoS2) as one such high-activity candidate material and demonstrate that its specific morphology--film, microwire, or nanowire, made available through controlled synthesis--plays a crucial role in determining its overall catalytic efficacy. The increase in effective electrode surface area that accompanies CoS2 micro- and nanostructuring substantially boosts its HER catalytic performance, with CoS2 nanowire electrodes achieving geometric current densities of -10 mA cm(-2) at overpotentials as low as -145 mV vs the reversible hydrogen electrode. Moreover, micro- and nanostructuring of the CoS2 material has the synergistic effect of increasing its operational stability, cyclability, and maximum achievable rate of hydrogen generation by promoting the release of evolved gas bubbles from the electrode surface. The benefits of catalyst micro- and nanostructuring are further demonstrated by the increased electrocatalytic activity of CoS2 nanowire electrodes over planar film electrodes toward polysulfide and triiodide reduction, which suggests a straightforward way to improve the performance of quantum dot- and dye-sensitized solar cells, respectively. Extension of this micro- and nanostructuring strategy to other earth-abundant materials could similarly enable inexpensive electrocatalysts that lac…

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Crossref · 10.1021/ja504099w

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Authors
Faber, M. S., Dziedzic, R., Lukowski, M. A., Kaiser, N. S., Ding, Q., & Jin, S.
Affiliations
University of Wisconsin–Madison (US)
Corresponding author
Jin, Song
Venue
Journal of the American Chemical Society
Published
2014-06-17
Volume
136
Issue
28
Pages
10053-10061
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2331768105
Cited by
1,372
References
48
Citations by year
2026: 34 · 2025: 69 · 2024: 89 · 2023: 82 · 2022: 83 · 2021: 118 · 2020: 128 · 2019: 165 · 2018: 160 · 2017: 197 · 2016: 131 · 2015: 95 · 2014: 19
FWCI
48.63
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
Funders
U.S. Department of Energy (DE-FG02-09ER46664)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
Keywords
cobalt disulfide, CoS2, hydrogen evolution reaction, electrocatalysis, nanowire electrodes, microwire electrodes, nanostructuring, earth-abundant catalysts, polysulfide reduction, triiodide reduction, quantum dot solar cells, dye-sensitized solar cells, catalyst stability, gas bubble release

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