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Mechanism of the Fenton reaction. Evidence for a new intermediate
Abstract
For the first time, the time dependence of the amount of O2 evolved in the reaction of Fe2+ with H2O2 (the Fenton reaction) was measured by following the decrease of the total [Fe3+] formed upon quenching the reaction mixture with an excess of a strongly acidic solution of Fe2+. The disappearance of Fe2+ in the reaction was followed by quenching it with o-phenanthroline and measuring the absorbance of the Fe2+-phenanthroline complex formed at λ=510 nm. At [H2O2]<10-4 mol dm-3, and quenching the reaction with Fe2+ ions, the formation of a new intermediate was observed. It was identified as the mixed valence binuclear species {FeOFe}5+. A new mechanism for the reaction has been proposed in which FeO2+ acts as the key intermediate. Several rate constants and ratios of rate constants have been determined. The existence of free radicals in the system does not seem to be compatible with the data.
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Cites
LXXIII.—Oxidation of tartaric acid in presence of iron
Fenton, H. J. H. (1894) · J. Chem. Soc., Trans. · doi:10.1039/ct8946500899 · Cited by 3,179
Cited by
Pignatello, J. J., Oliveros, E., & MacKay, A. (2006) · Critical Reviews in Environmental Science and Technology · doi:10.1080/10643380500326564 · Cited by 4,133
Recent Advances in Electrocatalysts for Oxygen Reduction Reaction
Shao, M., Chang, Q., Dodelet, J.-P., & Chenitz, R. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00462 · Cited by 3,903
Electro-Fenton Process and Related Electrochemical Technologies Based on Fenton’s Reaction Chemistry
Brillas, E., Sirés, I., & Oturan, M. A. (2009) · Chemical Reviews · doi:10.1021/cr900136g · Cited by 3,437
Iron and aluminium based adsorption strategies for removing arsenic from water
Giles, D. E., Mohapatra, M., Issa, T. B., Anand, S., & Singh, P. (2011) · Journal of Environmental Management · doi:10.1016/j.jenvman.2011.07.018 · Cited by 345
The Fenton Reaction. Dependence of the Rate on pH
Kremer, M. L. (2003) · The Journal of Physical Chemistry A · doi:10.1021/jp020654p · Cited by 197
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Metadata
- Authors
- Kremer, M. L.
- Venue
- Physical Chemistry Chemical Physics
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 1999
- Volume
- 1
- Issue
- 15
- Pages
- 3595-3605
- ISSN
- 1463-9076 (ISSN-L)
- 1463-9084
- OpenAlex
- W2147282249
- Cited by
- 255
- References
- 1
- FWCI
- 7.01
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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