Dependence of the Properties of Ce–Zr–Y–La–M–O Systems on Synthetic Conditions and on the Nature of the Transition Metal M (Mn, Fe, Co) Full article
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2007, Volume: 48, Number: 1, Pages: 143-152 Pages count : 10 DOI: 10.1134/S0023158407010193 | ||
| Tags | Cerium; Unit Cell Parameter; Transition Metal Cation; Cerium Content; Manganese Cation | ||
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Abstract:
The effects of synthetic conditions, component ratios, and the nature of the transition metal on the physicochemical and catalytic properties of Ce-Zr-Y-La-M-O (M = Mn, Fe, Co) systems are studied. The Ce-Zr-Y-La-M-O samples precipitated at ∼23°C and calcined at 600°C are single-phase and are solid solutions with a fluorite structure, which persists upon calcination at 1150°C. The Ce-Zr-Y-La-Fe(Co)-O samples precipitated at 70°C and calcined at 1150°C consist of two solid solutions, one cubic, and the other tetragonal. The specific surface area (S sp) of the samples precipitated at ∼23°C and calcined at 600°C increases in the order Ce-Zr-Y-La-O < Ce-Zr-Y-La-Mn-O < Ce-Zr-Y-La-Co-O ≈ Ce-Zr-Y-La-Fe-O. The specific surface area of the samples precipitated at 70°C is of M and is ∼110 m2/g. Calcination at 1150°C reduces S sp approximately by two orders of magnitude. The TPR of the unpromoted systems in H2 proceeds in two steps at 600–650 and 750–840°C. The introduction of M decreases the reduction temperatures and gives rise to a lower temperature peak between 150 and 300°C. The most effective promoter is cobalt. The fluorite-type catalysts containing no noble metal are active in NO reduction (X NO ≈ 100%) at T react = 400–450°C. The cobalt-containing catalysts are the most active in the oxidation of CO (X max = 28%) and hydrocarbons (X max = 4.3%).
Cite:
Turko G.A.
, Ivanova A.S.
, Plyasova L.M.
, Litvak G.S.
, Rogov V.A.
, Slavinskaya E.M.
, Polukhina I.A.
, Noskov A.S.
Dependence of the Properties of Ce–Zr–Y–La–M–O Systems on Synthetic Conditions and on the Nature of the Transition Metal M (Mn, Fe, Co)
Kinetics and Catalysis. 2007. V.48. N1. P.143-152. DOI: 10.1134/S0023158407010193 WOS Scopus РИНЦ ANCAN OpenAlex
Dependence of the Properties of Ce–Zr–Y–La–M–O Systems on Synthetic Conditions and on the Nature of the Transition Metal M (Mn, Fe, Co)
Kinetics and Catalysis. 2007. V.48. N1. P.143-152. DOI: 10.1134/S0023158407010193 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Турко Г.А.
, Иванова А.С.
, Плясова Л.М.
, Литвак Г.С.
, Рогов В.А.
, Славинская Е.М.
, Полухина И.А.
, Носков А.С.
Влияние условий синтеза и природы переходного металла (Mn, Fe, Co) на свойства Ce-Zr-Y-La-M-О-систем
Кинетика и катализ. 2007. Т.48. №1. С.150-160. РИНЦ
Влияние условий синтеза и природы переходного металла (Mn, Fe, Co) на свойства Ce-Zr-Y-La-M-О-систем
Кинетика и катализ. 2007. Т.48. №1. С.150-160. РИНЦ
Dates:
| Submitted: | May 23, 2005 |
| Published print: | Feb 1, 2007 |
Identifiers:
| Web of science: | WOS:000244313200019 |
| Scopus: | 2-s2.0-33847222747 |
| Elibrary: | 13541055 |
| Chemical Abstracts: | 2007:168763 |
| Chemical Abstracts (print): | 146:469349 |
| OpenAlex: | W2054675470 |