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Initial Steps in the Reaction of H2O2 with Fe2+ and Fe3+ Ions: Inconsistency in the Free Radical Theory
Initial Steps in the Reaction of H2O2 with Fe2+ and Fe3+ Ions: Inconsistency in the Free Radical Theory
- Source :
- Reactions, Vol 4, Iss 1, Pp 171-175 (2023)
- Publication Year :
- 2023
- Publisher :
- MDPI AG, 2023.
-
Abstract
- Consideration of the changes in free energy shows that the assumed initial steps in reactions of H2O2 with Fe2+ and Fe3+ in the free radical theory are not consistent. The free radical theory is unable to account for the Fe3+-initiated decomposition of H2O2 or for oxidations by it. In reactions with Fe2+ ions at high [H2O2], where O2 evolution reaches a limit, such limit is not foreseen by the free radical model. At lower [H2O2], because of a disallowed substitution in the equation used, the interpretation is not valid. It appears, therefore, that free radicals derived from H2O2 do not provide a suitable basis for constructing models for these reactions. Non-radical models are more successful in interpreting experimental results.
- Subjects :
- Fenton reaction
free radicals
free energy
Fe2+
Fe3+
H2O2
Chemistry
QD1-999
Subjects
Details
- Language :
- English
- ISSN :
- 2624781X
- Volume :
- 4
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Reactions
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.7666a6d0a920410eab812f96e825e96a
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/reactions4010010