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2008 | 6 | 1 | 115-124
Tytuł artykułu

Investigation on the catalytic activity of doped low-percentage oxide catalysts Mn/ZnO obtained from oxalate precursor

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The precursors with a low manganese content ≤ 0.07% Mn were synthesized by spontaneous crystallization from Zn2+, Mn2+ and C2O42−-containing solutions. The initial ratio Zn2+:C2O42− = 1:1 and 1:2 influences the morphology and prevailing orientations of the crystallites in the oxalate samples. The presence of such small Mn content in the samples does not change the morphology or size of the crystals. The ZnO and Mn/ZnO oxides with manganese content from 0.51×10−2 to 15.1×10−2 Wt % are obtained after thermal decomposition of the oxalates. The oxides preserved the morphology of the precursors. The catalytic tests show that the pure ZnO has a poor activity for CO oxidation reaction. Its doping with Mn promotes the catalytic activity (up from twice to five times) in spite of the very low contents of the dopants. The observed increase of the activity depends on both dopant concentration and Zn2+:C2O42− ratio, probably due to the different mechanism of the manganese inclusion and different morphology of the oxides. The catalysts of the 1:2 series are more active in CO oxidation reaction. [...]
Słowa kluczowe
Wydawca

Czasopismo
Rocznik
Tom
6
Numer
1
Strony
115-124
Opis fizyczny
Daty
wydano
2008-03-01
online
2008-03-01
Twórcy
  • Department of Inorganic Chemistry, Faculty of Chemistry, University of Sofia, 1 J. Bouchier Av., Sofia, 1164, Bulgaria, nhbd@inorg.chem.uni-sofia.bg
  • Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl 11, Sofia, 1113, Bulgaria
  • Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl 11, Sofia, 1113, Bulgaria
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-007-0071-3
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