Cited by 941Electrocatalysts for Energy ConversionCatalysis and Hydrodesulfurization StudiesMetalloenzymes and iron-sulfur proteins

Fe, Co, and Ni ions promote the catalytic activity of amorphous molybdenum sulfide films for hydrogen evolution

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Merki, Daniel, Vrubel, Heron, Rovelli, Lorenzo, Fierro, Stéphane, Hu, Xile·2012·Chemical Science

Abstract

Molybdenum sulfide materials have been shown as promising non-precious catalysts for hydrogen evolution. This paper describes the study of the promotional effects of certain transition metal ions on the activity of amorphous MoS3 films. Ternary metal sulfide films, M–MoS3 (M = Mn, Fe, Co, Ni, Cu, Zn), have been prepared by cyclic voltammetry of aqueous solutions containing MCl2 and (NH4)2[MoS4]. Whereas the Mn–, Cu–, and Zn–MoS3 films show similar or only slightly higher catalytic activity as the MoS3 film, the Fe–, Co–, and Ni–MoS3 films are significantly more active. The promotional effects of Fe, Co, and Ni ions exist under both acidic and neutral conditions, but the effects are more pronounced under neutral conditions. Up to a 12-fold increase in exchange current density and a 10-fold increase in the current density at an overpotential of 150 mV are observed at pH = 7. It is shown that Fe, Co, and Ni ions promote the growth of the MoS3 films, resulting a high surface area and a higher catalyst loading. These changes are the main contributors to the enhanced activity at pH = 0. However, at pH = 7, Fe, Co, and Ni ions appear to also increase the intrinsic activity of the MoS3 film.

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Crossref · 10.1039/c2sc20539d

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Authors
Merki, D., Vrubel, H., Rovelli, L., Fierro, S., & Hu, X.
Affiliations
École Polytechnique Fédérale de Lausanne (CH)
Corresponding author
Hu, Xile
Venue
Chemical Science
Published
2012
Volume
3
Issue
8
Pages
2515
ISSN
  • 2041-6520 (ISSN-L)
  • 2041-6539
OpenAlex
W2120703005
Cited by
941
References
0
Citations by year
2026: 17 · 2025: 30 · 2024: 34 · 2023: 53 · 2022: 49 · 2021: 54 · 2020: 78 · 2019: 94 · 2018: 102 · 2017: 115 · 2016: 104 · 2015: 91 · 2014: 74 · 2013: 34 · 2012: 11
FWCI
25.75
Type
journal article
Language
en
Open access
Locations
  • Chemical Science (publishedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Engineering › Mechanical Engineering › Catalysis and Hydrodesulfurization Studies
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Metalloenzymes and iron-sulfur proteins
Keywords
amorphous molybdenum sulfide, hydrogen evolution reaction, non-noble metal catalysts, transition metal doping, ternary sulfides, film growth, surface area, exchange current density, pH dependence

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