Iron(II) Sulfate Oxidation with Oxygen on a Pt/C Catalyst: A Kinetic Study Full article
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2008, Volume: 49, Number: 1, Pages: 34-42 Pages count : 9 DOI: 10.1134/S0023158408010059 | ||
| Tags | Coordination Sphere; Sulfate Oxidation; Aqua Complex; Sodium Formate; Platinum Surface | ||
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Abstract:
The kinetics of iron(II) sulfate oxidation with molecular oxygen on the 2% Pt/Sibunit catalyst was studied by a volumetric method at atmospheric pressure, T = 303 K, pH 0.33–2.4, [FeSO4] = 0.06−0.48 mol/l, and [Fe2(SO4)3] = 0−0.36 mol/l in the absence of diffusion limitations. Relationships were established between the reaction rate and the concentrations of Fe2+, Fe3+, H+, and Cl− ions in the reaction solution. The kinetic isotope effect caused by the replacement of H2O with D2O and of H+ with D+ was measured. The dependence of Fe2+ and Fe3+ adsorption on the catalyst pretreatment conditions was studied. A reaction scheme is suggested, which includes oxygen adsorption, the formation of a Fe(II) complex with surface oxygen, and the one-electron reduction of oxygen. The last step can proceed via two pathways, namely, electron transfer with H+ addition and hydrogen atom transfer from the coordination sphere of the iron(II) aqua complex. A kinetic equation providing a satisfactory fit to experimental data is set up. Numerical values are determined for the rate constants of the individual steps of the scheme suggested.
Cite:
Okhlopkova L.B.
, Kuznetsova N.I.
Iron(II) Sulfate Oxidation with Oxygen on a Pt/C Catalyst: A Kinetic Study
Kinetics and Catalysis. 2008. V.49. N1. P.34-42. DOI: 10.1134/S0023158408010059 WOS Scopus РИНЦ ANCAN OpenAlex
Iron(II) Sulfate Oxidation with Oxygen on a Pt/C Catalyst: A Kinetic Study
Kinetics and Catalysis. 2008. V.49. N1. P.34-42. DOI: 10.1134/S0023158408010059 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Охлопкова Л.Б.
, Кузнецова Н.И.
Окисление сульфата железа(II) кислородом на катализаторе Pt/C. Кинетическое исследование
Кинетика и катализ. 2008. Т.49. №1. С.38-47. РИНЦ
Окисление сульфата железа(II) кислородом на катализаторе Pt/C. Кинетическое исследование
Кинетика и катализ. 2008. Т.49. №1. С.38-47. РИНЦ
Dates:
| Submitted: | Sep 7, 2006 |
| Published print: | Jan 1, 2008 |
| Published online: | Jan 19, 2011 |
Identifiers:
| Web of science: | WOS:000253546400005 |
| Scopus: | 2-s2.0-41049108312 |
| Elibrary: | 13575093 |
| Chemical Abstracts: | 2008:342616 |
| Chemical Abstracts (print): | 148:569871 |
| OpenAlex: | W2082458372 |