Activation parameters of ferryl ion reactions in aqueous acid solutions

F. Jacobsen; J. Holcman; K. Sehested

doi:10.1002/(SICI)1097-4601(1997)29:1<17::AID-KIN3>3.0.CO;2-O

Activation parameters of ferryl ion reactions in aqueous acid solutions

F. Jacobsen, J. Holcman, K. Sehested

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Abstract

The temperature dependence of the oxidation kinetics of Fe²⁺ by O₃ at pH 0-3 was studied by stopped-flow technique in the temperature range 5-40°C. Activation parameters of the reactions involved in formation and decay of the ferryl ion (iron(IV)), FeO²⁺are determined. The reaction of Fe²⁺ + FeO²⁺ was found to branch into two channels forming iron(III)-dimer, Fe(OH)₂Fe⁴⁺, and Fe³⁺. The yield of the dinner, Fe(OH)₂Fe⁴⁺, increases with temperature on the expense of the Fe³⁺ yield. On the basis of the overall rate constant and relative yield of Fe(OH)₂Fe⁴⁺ the activation energy is determined for both channels. The activation parameters of the hydrolysis of the ferryl ion and its reaction with H₂O₂ were also determined.

Original language	English
Journal	International Journal of Chemical Kinetics
Volume	29
Issue number	1
Pages (from-to)	17-24
ISSN	0538-8066
DOIs	https://doi.org/10.1002/(SICI)1097-4601(1997)29:1<17::AID-KIN3>3.0.CO;2-O
Publication status	Published - 1997

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title = "Activation parameters of ferryl ion reactions in aqueous acid solutions",

abstract = "The temperature dependence of the oxidation kinetics of Fe2+ by O3 at pH 0-3 was studied by stopped-flow technique in the temperature range 5-40°C. Activation parameters of the reactions involved in formation and decay of the ferryl ion (iron(IV)), FeO2+ are determined. The reaction of Fe2+ + FeO2+ was found to branch into two channels forming iron(III)-dimer, Fe(OH)2Fe4+, and Fe3+. The yield of the dinner, Fe(OH)2Fe4+, increases with temperature on the expense of the Fe3+ yield. On the basis of the overall rate constant and relative yield of Fe(OH)2Fe4+ the activation energy is determined for both channels. The activation parameters of the hydrolysis of the ferryl ion and its reaction with H2O2 were also determined.",

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T1 - Activation parameters of ferryl ion reactions in aqueous acid solutions

AU - Jacobsen, F.

AU - Holcman, J.

AU - Sehested, K.

PY - 1997

Y1 - 1997

N2 - The temperature dependence of the oxidation kinetics of Fe2+ by O3 at pH 0-3 was studied by stopped-flow technique in the temperature range 5-40°C. Activation parameters of the reactions involved in formation and decay of the ferryl ion (iron(IV)), FeO2+ are determined. The reaction of Fe2+ + FeO2+ was found to branch into two channels forming iron(III)-dimer, Fe(OH)2Fe4+, and Fe3+. The yield of the dinner, Fe(OH)2Fe4+, increases with temperature on the expense of the Fe3+ yield. On the basis of the overall rate constant and relative yield of Fe(OH)2Fe4+ the activation energy is determined for both channels. The activation parameters of the hydrolysis of the ferryl ion and its reaction with H2O2 were also determined.

AB - The temperature dependence of the oxidation kinetics of Fe2+ by O3 at pH 0-3 was studied by stopped-flow technique in the temperature range 5-40°C. Activation parameters of the reactions involved in formation and decay of the ferryl ion (iron(IV)), FeO2+ are determined. The reaction of Fe2+ + FeO2+ was found to branch into two channels forming iron(III)-dimer, Fe(OH)2Fe4+, and Fe3+. The yield of the dinner, Fe(OH)2Fe4+, increases with temperature on the expense of the Fe3+ yield. On the basis of the overall rate constant and relative yield of Fe(OH)2Fe4+ the activation energy is determined for both channels. The activation parameters of the hydrolysis of the ferryl ion and its reaction with H2O2 were also determined.

KW - Vindenergi og atmosfæriske processer

U2 - 10.1002/(SICI)1097-4601(1997)29:1<17::AID-KIN3>3.0.CO;2-O

DO - 10.1002/(SICI)1097-4601(1997)29:1<17::AID-KIN3>3.0.CO;2-O

M3 - Journal article

SN - 0538-8066

VL - 29

SP - 17

EP - 24

JO - International Journal of Chemical Kinetics

JF - International Journal of Chemical Kinetics

IS - 1

ER -

Activation parameters of ferryl ion reactions in aqueous acid solutions

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