The DOI matches its Crossref record; 54 of the 54 references it cites were found in a registry or an index.
CoSe2 and NiSe2 Nanocrystals as Superior Bifunctional Catalysts for Electrochemical and Photoelectrochemical Water Splitting
Abstract
Catalysts for oxygen evolution reactions (OER) and hydrogen evolution reactions (HER) are central to key renewable energy technologies, including fuel cells and water splitting. Despite tremendous effort, the development of low-cost electrode catalysts with high activity remains a great challenge. In this study, we report the synthesis of CoSe2 and NiSe2 nanocrystals (NCs) as excellent bifunctional catalysts for simultaneous generation of H2 and O2 in water-splitting reactions. NiSe2 NCs exhibit superior electrocatalytic efficiency in OER, with a Tafel slope (b) of 38 mV dec(-1) (in 1 M KOH), and HER, with b = 44 mV dec(-1) (in 0.5 M H2SO4). In comparison, CoSe2 NCs are less efficient for OER (b = 50 mV dec(-1)), but more efficient for HER (b = 40 mV dec(-1)). It was found that CoSe2 NCs contained more metallic metal ions than NiSe2, which could be responsible for their improved performance in HER. Robust evidence for surface oxidation suggests that the surface oxide layers are the actual active sites for OER, and that CoSe2 (or NiSe2) under the surface act as good conductive layers. The higher catalytic activity of NiSe2 is attributed to their oxide layers being more active than those of CoSe2. Furthermore, we fabricated a Si-based photoanode by depositing NiSe2 NCs onto an n-type Si nanowire array, which showed efficient photoelectrochemical water oxidation with a low onset potential (0.7 V versus reversible hydrogen electrode) and high durability. The remarkable catalytic activity, low cost, and scalability of NiSe2 make it a promising candidate for practical water-splitting solar cells.
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Citations
Cites
Identification of Active Edge Sites for Electrochemical H 2 Evolution from MoS 2 Nanocatalysts
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Noble metal-free hydrogen evolution catalysts for water splitting
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Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction
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A Perovskite Oxide Optimized for Oxygen Evolution Catalysis from Molecular Orbital Principles
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MoS 2 Nanoparticles Grown on Graphene: An Advanced Catalyst for the Hydrogen Evolution Reaction
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Cited by
Heterostructures for Electrochemical Hydrogen Evolution Reaction: A Review
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Ďurovič, M., Hnát, J., & Bouzek, K. (2021) · Journal of Power Sources · doi:10.1016/j.jpowsour.2021.229708 · Cited by 436
Ming, F., Liang, H., Shi, H., Xu, X., Mei, G., & Wang, Z. (2016) · Journal of Materials Chemistry A · doi:10.1039/c6ta06496e · Cited by 332
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Metadata
- Authors
- Kwak, I. H., Im, H. S., Jang, D. M., Kim, Y. W., Park, K., Lim, Y. R., Cha, E. H., & Park, J.
- Venue
- ACS Applied Materials & Interfaces
- Publisher
- American Chemical Society (ACS)
- Published
- 2016-02-17
- Volume
- 8
- Issue
- 8
- Pages
- 5327-5334
- ISSN
- 1944-8244 (ISSN-L)
- 1944-8252
- OpenAlex
- W2264947591
- Cited by
- 486
- References
- 54
- FWCI
- 19.04
- Type
- journal article
- Language
- en
- Open access
- closed
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- Kwak, I. H., Im, H. S., Jang, D. M., Kim, Y. W., Park, K., Lim, Y. R., Cha, E. H., & Park, J. (2016). CoSe2 and NiSe2 Nanocrystals as Superior Bifunctional Catalysts for Electrochemical and Photoelectrochemical Water Splitting. ACS Applied Materials & Interfaces. https://doi.org/10.1021/acsami.5b12093
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