Hydrogen peroxide oxidation on passive iron in alkaline solutions
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.
Keywords:
electrochemical oxidation / hydrogen peroxide / passive iron / rotating disk electrodeSource:
Electrochimica Acta, 1992, 37, 10, 1845-1850Publisher:
- Pergamon-Elsevier Science Ltd, Oxford
DOI: 10.1016/0013-4686(92)85088-3
ISSN: 0013-4686
PubMed:
Scopus: 2-s2.0-0026908111
Institution/Community
Tehnološko-metalurški fakultetTY - 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 UR - conv_7472 ER -
@article{ author = "Gojković, Snežana and Zečević, S.K. and Dražić, Dragutin M.", year = "1992", 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", url = "conv_7472" }
Gojković, S., Zečević, S.K.,& Dražić, D. M.. (1992). Hydrogen peroxide oxidation on passive iron in alkaline solutions. in Electrochimica Acta Pergamon-Elsevier Science Ltd, Oxford., 37(10), 1845-1850. https://doi.org/10.1016/0013-4686(92)85088-3 conv_7472
Gojković S, Zečević S, Dražić DM. Hydrogen peroxide oxidation on passive iron in alkaline solutions. in Electrochimica Acta. 1992;37(10):1845-1850. doi:10.1016/0013-4686(92)85088-3 conv_7472 .
Gojković, Snežana, Zečević, S.K., Dražić, Dragutin M., "Hydrogen peroxide oxidation on passive iron in alkaline solutions" in Electrochimica Acta, 37, no. 10 (1992):1845-1850, https://doi.org/10.1016/0013-4686(92)85088-3 ., conv_7472 .