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Enlarged CoO Covalency in Octahedral Sites Leading to Highly Efficient Spinel Oxides for Oxygen Evolution Reaction
Abstract
Cobalt‐containing spinel oxides are promising electrocatalysts for the oxygen evolution reaction (OER) owing to their remarkable activity and durability. However, the activity still needs further improvement and related fundamentals remain untouched. The fact that spinel oxides tend to form cation deficiencies can differentiate their electrocatalysis from other oxide materials, for example, the most studied oxygen‐deficient perovskites. Here, a systematic study of spinel ZnFexCo 2−xO 4 oxides (x = 0–2.0) toward the OER is presented and a highly active catalyst superior to benchmark IrO 2 is developed. The distinctive OER activity is found to be dominated by the metal–oxygen covalency and an enlarged CoO covalency by 10–30 at% Fe substitution is responsible for the activity enhancement. While the pH‐dependent OER activity of ZnFe 0.4 Co 1.6 O 4 (the optimal one) indicates decoupled proton–electron transfers during the OER, the involvement of lattice oxygen is not considered as a favorable route because of the downshifted O p‐band center relative to Fermi level governed by the spinel's cation deficient nature.
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Cited by
A review on fundamentals for designing oxygen evolution electrocatalysts
Song, J., Wei, C., Huang, Z.-F., Liu, C., Zeng, L., Wang, X., & Xu, Z. J. (2020) · Chemical Society Reviews · doi:10.1039/c9cs00607a · Cited by 2,936
Self-citationChatenet, M., Pollet, B. G., Dekel, D. R., Dionigi, F., Deseure, J., Millet, P., Braatz, R. D., Bazant, M. Z., Eikerling, M., Staffell, I., et al. (2022) · Chemical Society Reviews · doi:10.1039/d0cs01079k · Cited by 2,025
Oxygen Evolution Reaction in Alkaline Environment: Material Challenges and Solutions
Xie, X., Du, L., Yan, L., Park, S., Qiu, Y., Sokolowski, J., Wang, W., & Shao, Y. (2022) · Advanced Functional Materials · doi:10.1002/adfm.202110036 · Cited by 792
Rong, C., Shen, X., Wang, Y., Thomsen, L., Zhao, T., Li, Y., Lu, X., Amal, R., & Zhao, C. (2022) · Advanced Materials · doi:10.1002/adma.202110103 · Cited by 503
A Lattice‐Oxygen‐Involved Reaction Pathway to Boost Urea Oxidation
Zhang, L., Wang, L., Lin, H., Liu, Y., Ye, J., Wen, Y., Chen, A., Wang, L., Ni, F., Zhou, Z., et al. (2019) · Angewandte Chemie International Edition · doi:10.1002/anie.201909832 · Cited by 336
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Metadata
- Authors
- Zhou, Y., Sun, S., Song, J., Xi, S., Chen, B., Du, Y., Fisher, A. C., Cheng, F., Wang, X., Zhang, H., & Xu, Z. J.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2018-06-25
- Volume
- 30
- Issue
- 32
- Pages
- e1802912-e1802912
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2810705669
- Cited by
- 468
- References
- 0
- FWCI
- 10.52
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Zhou, Y., Sun, S., Song, J., Xi, S., Chen, B., Du, Y., Fisher, A. C., Cheng, F., Wang, X., Zhang, H., & Xu, Z. J. (2018). Enlarged CoO Covalency in Octahedral Sites Leading to Highly Efficient Spinel Oxides for Oxygen Evolution Reaction. Advanced Materials. https://doi.org/10.1002/adma.201802912
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