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Observing the oxidation state turnover in heterogeneous iridium-based water oxidation catalysts
Open accessAbstract
In this work the oxidation states assumed by Ir in oxide systems used as heterogeneous catalysts for water oxidation are determined by means of in situ X-ray Absorption Spectroscopy (XAS). Using a highly hydrated iridium oxide film allows the maximum number of Ir sites to be involved in the electrochemical processes occurring at the catalysts during water oxidation (oxygen evolution reaction, OER). X-ray Absorption Near Edge Structure (XANES) spectra clearly indicate the co-existence of Ir(III) and Ir(V) at the electrode potentials where OER occurs. This represents a fundamental step both in the understanding of the water oxidation mechanism catalysed by heterogeneous Ir oxide systems, and in the possible tailoring of electrocatalysts for OER.
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Citations
Cites
Benchmarking Heterogeneous Electrocatalysts for the Oxygen Evolution Reaction
McCrory, C. C. L., Jung, S., Peters, J. C., & Jaramillo, T. F. (2013) · Journal of the American Chemical Society · doi:10.1021/ja407115p · Cited by 7,026
The Mechanism of Water Oxidation: From Electrolysis via Homogeneous to Biological Catalysis
Dau, H., Limberg, C., Reier, T., Risch, M., Roggan, S., & Strasser, P. (2010) · ChemCatChem · doi:10.1002/cctc.201000126 · Cited by 1,783
Cited by
Reier, T., Nong, H. N., Teschner, D., Schlögl, R., & Strasser, P. (2017) · Advanced Energy Materials · doi:10.1002/aenm.201601275 · Cited by 1,253
The stability number as a metric for electrocatalyst stability benchmarking
Geiger, S., Kasian, O., Ledendecker, M., Pizzutilo, E., Mingers, A. M., Fu, W. T., Diaz-Morales, O., Li, Z., Oellers, T., Fruchter, L., et al. (2018) · Nature Catalysis · doi:10.1038/s41929-018-0085-6 · Cited by 1,045
Ultrahigh-Loading of Ir Single Atoms on NiO Matrix to Dramatically Enhance Oxygen Evolution Reaction
Wang, Q., Huang, X., Zhao, Z. L., Wang, M., Xiang, B., Li, J., Feng, Z., Xu, H., & Gu, M. (2020) · Journal of the American Chemical Society · doi:10.1021/jacs.9b12642 · Cited by 657
Zhao, G., Li, P., Cheng, N., Dou, S. X., & Sun, W. (2020) · Advanced Materials · doi:10.1002/adma.202000872 · Cited by 333
Deng, Y., & Yeo, B. S. (2017) · ACS Catalysis · doi:10.1021/acscatal.7b02561 · Cited by 284
Metadata
- Authors
- Minguzzi, A., Lugaresi, O., Achilli, E., Locatelli, C., Vertova, A., Ghigna, P., & Rondinini, S.
- Venue
- Chemical Science
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2014-05-19
- Volume
- 5
- Issue
- 9
- Pages
- 3591
- ISSN
- 2041-6520 (ISSN-L)
- 2041-6539
- OpenAlex
- W2134881932
- Cited by
- 241
- References
- 2
- FWCI
- 5.89
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Minguzzi, A., Lugaresi, O., Achilli, E., Locatelli, C., Vertova, A., Ghigna, P., & Rondinini, S. (2014). Observing the oxidation state turnover in heterogeneous iridium-based water oxidation catalysts. Chemical Science. https://doi.org/10.1039/c4sc00975d
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