The kinetics of hydrogen peroxide oxidation were studied on passive iron in alkaline solutions of pH ranging from 9.8 to 13.8, using the rotating disk electrode. Measurements were taken using the linear sweep technique. The kinetic parameters of H2O2 oxidation were determined: the Tafel slope is 110 mV dec-1 and the reaction order with respect to H2O2 is 0.5 and with respect to the OH- ion 0.7. It is assumed that the rate determining step is the transfer of the first electron to the HO-2 ion adsorbed under Temkin conditions. The pH dependence of the reaction rate is attributed to the pH dependent properties of the passive iron surface. There are no indications for the semiconducting behaviour of the passive film. The rate of H2O2 chemical decomposition was estimated. It was found that the passive film on iron was a poor catalyst for H2O2 chemical decomposition.
Keywords:
electrochemical oxidation / hydrogen peroxide / passive iron / rotating disk electrode
TY - JOUR
AU - Gojković, Snežana
AU - Zečević, S.K.
AU - Dražić, Dragutin M.
PY - 1992
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/34
AB - The kinetics of hydrogen peroxide oxidation were studied on passive iron in alkaline solutions of pH ranging from 9.8 to 13.8, using the rotating disk electrode. Measurements were taken using the linear sweep technique. The kinetic parameters of H2O2 oxidation were determined: the Tafel slope is 110 mV dec-1 and the reaction order with respect to H2O2 is 0.5 and with respect to the OH- ion 0.7. It is assumed that the rate determining step is the transfer of the first electron to the HO-2 ion adsorbed under Temkin conditions. The pH dependence of the reaction rate is attributed to the pH dependent properties of the passive iron surface. There are no indications for the semiconducting behaviour of the passive film. The rate of H2O2 chemical decomposition was estimated. It was found that the passive film on iron was a poor catalyst for H2O2 chemical decomposition.
PB - Pergamon-Elsevier Science Ltd, Oxford
T2 - Electrochimica Acta
T1 - Hydrogen peroxide oxidation on passive iron in alkaline solutions
EP - 1850
IS - 10
SP - 1845
VL - 37
DO - 10.1016/0013-4686(92)85088-3
ER -
@article{
author = "Gojković, Snežana and Zečević, S.K. and Dražić, Dragutin M.",
year = "1992",
url = "http://TechnoRep.tmf.bg.ac.rs/handle/123456789/34",
abstract = "The kinetics of hydrogen peroxide oxidation were studied on passive iron in alkaline solutions of pH ranging from 9.8 to 13.8, using the rotating disk electrode. Measurements were taken using the linear sweep technique. The kinetic parameters of H2O2 oxidation were determined: the Tafel slope is 110 mV dec-1 and the reaction order with respect to H2O2 is 0.5 and with respect to the OH- ion 0.7. It is assumed that the rate determining step is the transfer of the first electron to the HO-2 ion adsorbed under Temkin conditions. The pH dependence of the reaction rate is attributed to the pH dependent properties of the passive iron surface. There are no indications for the semiconducting behaviour of the passive film. The rate of H2O2 chemical decomposition was estimated. It was found that the passive film on iron was a poor catalyst for H2O2 chemical decomposition.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Electrochimica Acta",
title = "Hydrogen peroxide oxidation on passive iron in alkaline solutions",
pages = "1850-1845",
number = "10",
volume = "37",
doi = "10.1016/0013-4686(92)85088-3"
}
Gojković, S., Zečević, S.K.,& Dražić, D. M. (1992). Hydrogen peroxide oxidation on passive iron in alkaline solutions.
Electrochimica Acta
Pergamon-Elsevier Science Ltd, Oxford., 37(10), 1845-1850.
https://doi.org/10.1016/0013-4686(92)85088-3
Gojković S, Zečević S, Dražić DM. Hydrogen peroxide oxidation on passive iron in alkaline solutions. Electrochimica Acta. 1992;37(10):1845-1850
Gojković Snežana, Zečević S.K., Dražić Dragutin M., "Hydrogen peroxide oxidation on passive iron in alkaline solutions" Electrochimica Acta, 37, no. 10 (1992):1845-1850,
https://doi.org/10.1016/0013-4686(92)85088-3 .
