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Operando Spectroscopic Identification of Active Sites in NiFe Prussian Blue Analogues as Electrocatalysts: Activation of Oxygen Atoms for Oxygen Evolution Reaction
Abstract
Developing highly efficient oxygen evolution reaction (OER) catalysts and understanding their activity are pivotal for electrochemical conversion technologies. Here, we report NiFe Prussian blue analogue (PBA) as a promising electrocatalyst for OER in alkaline conditions. This material has an impressively low overpotential of 258 mV that reaches a current density of 10 mA cm –2 . Post-mortem characterization showed that the as-prepared catalyst is entirely transformed into amorphous nickel hydroxide after the electrochemical treatment, and Ni(OH) 2 acts as the active species. Operando X-ray spectroscopic studies further found that this in situ generated Ni(OH) 2 displays an unique feature that allows deprotonation under applied potential creating NiOOH 2– x that contains Ni 4+ ions. The deprotonation reaction is reversible and potential-dependent, i.e., the amount of Ni 4+ increases with increasing applied potential. Theoretical calculations were used to show that the role of Ni 4+ is to trigger oxidized oxygen ions as electrophilic centers with the subsequent activation of anion redox reactions for OER.
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Opportunities and challenges for a sustainable energy future
Chu, S., & Majumdar, A. (2012) · Nature · doi:10.1038/nature11475 · Cited by 12,550
Electrocatalysis for the oxygen evolution reaction: recent development and future perspectives
Suen, N.-T., Hung, S.-F., Quan, Q., Zhang, N., Xu, Y.-J., & Chen, H. M. (2017) · Chemical Society Reviews · doi:10.1039/c6cs00328a · Cited by 6,307
Low Overpotential in Vacancy-Rich Ultrathin CoSe2 Nanosheets for Water Oxidation
Liu, Y., Cheng, H., Lyu, M., Fan, S., Liu, Q., Zhang, W., Zhi, Y., Wang, C., Xiao, C., Wei, S., et al. (2014) · Journal of the American Chemical Society · doi:10.1021/ja5085157 · Cited by 1,094
Han, L., Yu, X., & Lou, X. W. (. (2016) · Advanced Materials · doi:10.1002/adma.201506315 · Cited by 633
Cited by
Liu, X., Meng, J., Zhu, J., Huang, M., Wen, B., Guo, R., & Mai, L. (2021) · Advanced Materials · doi:10.1002/adma.202007344 · Cited by 438
Mechanistic insight into the active centers of single/dual-atom Ni/Fe-based oxygen electrocatalysts
Wan, W., Zhao, Y., Wei, S., Triana, C. A., Li, J., Arcifa, A., Allen, C. S., Cao, R., & Patzke, G. R. (2021) · Nature Communications · doi:10.1038/s41467-021-25811-0 · Cited by 432
Self-citationHu, Y., Luo, G., Wang, L., Liu, X., Qu, Y., Zhou, Y., Zhou, F., Li, Z., Li, Y., Yao, T., et al. (2021) · Advanced Energy Materials · doi:10.1002/aenm.202002816 · Cited by 423
The HER/OER mechanistic study of an FeCoNi-based electrocatalyst for alkaline water splitting
Tsai, F.-T., Deng, Y.-T., Pao, C.-W., Chen, J.-L., Lee, J.-F., Lai, K.-T., & Liaw, W.-F. (2020) · Journal of Materials Chemistry A · doi:10.1039/d0ta01877e · Cited by 346
Huang, C., Zhou, Q., Duan, D., Yu, L., Zhang, W., Wang, Z., Liu, J., Peng, B., An, P., Zhang, J., et al. (2022) · Energy & Environmental Science · doi:10.1039/d2ee01478e · Cited by 319
Metadata
- Authors
- Su, X., Wang, Y., Zhou, J., Gu, S., Li, J., & Zhang, S.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2018-08-15
- Volume
- 140
- Issue
- 36
- Pages
- 11286-11292
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2886852674
- Cited by
- 460
- References
- 4
- FWCI
- 11.59
- Type
- journal article
- Language
- en
- Open access
- closed
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- Su, X., Wang, Y., Zhou, J., Gu, S., Li, J., & Zhang, S. (2018). Operando Spectroscopic Identification of Active Sites in NiFe Prussian Blue Analogues as Electrocatalysts: Activation of Oxygen Atoms for Oxygen Evolution Reaction. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.8b05294
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