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Oxygen−Oxygen Bond Formation by the Ru-Hbpp Water Oxidation Catalyst Occurs Solely via an Intramolecular Reaction Pathway
Abstract
A thorough kinetics investigation of the Ru-Hbpp water oxidation catalyst has been carried out at temperatures in the range 10-40 degrees C. Four oxidative electron-transfer processes that take the catalyst from its initial II,II oxidation state up to the formal IV,IV oxidation state were kinetically characterized and the corresponding activation parameters determined. Once the IV,IV oxidation state is reached, two additional slower kinetic processes take place, corresponding to the formation of an intermediate that finally evolves oxygen and regenerates the initial Ru-Hbpp catalyst. These two kinetic processes were also fully characterized with respect to the evaluation of their rate constants and activation parameters. Furthermore, (18)O labeling experiments were performed with different degrees of labeled catalyst and solvent, and the (16)O(2)/(16)O(18)O/(18)O(2) isotopic distribution of the generated molecular oxygen was calculated. These results clearly point to the existence of a single intramolecular reaction pathway for the formation of the oxygen-oxygen bond in the case of the Ru-Hbpp catalyst.
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Cited by
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
Artificial Photosynthesis: Molecular Systems for Catalytic Water Oxidation
Kärkäs, M. D., Verho, O., Johnston, E. V., & Åkermark, B. (2014) · Chemical Reviews · doi:10.1021/cr400572f · Cited by 1,376
Duan, L., Fischer, A., Xu, Y., & Sun, L. (2009) · Journal of the American Chemical Society · doi:10.1021/ja9034686 · Cited by 522
Metadata
- Authors
- Romain, S., Bozoglian, F., Sala, X., & Llobet, A.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-02-06
- Volume
- 131
- Issue
- 8
- Pages
- 2768-2769
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W1994169666
- Cited by
- 162
- References
- 0
- FWCI
- 11.19
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Oxygen−Oxygen Bond Formation by the Ru-Hbpp Water Oxidation Catalyst Occurs Solely via an Intramolecular Reaction Pathway. https://app.cochat.ai/papers/10.1021/ja808166d
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- Romain, S., Bozoglian, F., Sala, X., & Llobet, A. (2009). Oxygen−Oxygen Bond Formation by the Ru-Hbpp Water Oxidation Catalyst Occurs Solely via an Intramolecular Reaction Pathway. Journal of the American Chemical Society. https://doi.org/10.1021/ja808166d
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