Synthesis of Mesoporous Bimetallic Pt–Sn Catalytic Coatings from Polynuclear Precursors for Fine Organic Synthesis Processes Full article
| Journal |
Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779 |
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| Output data | Year: 2013, Volume: 54, Number: 6, Pages: 1034-1043 Pages count : 10 DOI: 10.1134/S0022476613060061 | ||||
| Tags | Bimetallic clusters, Capillary microreactors, Citral hydrogenation, Mesoporous titanium oxide, Nanostructured catalysts, Sol-gel synthesis | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 12-03-00722 |
| 2 | Siberian Branch of the Russian Academy of Sciences | 76 |
Abstract:
A new method is developed to obtain nanosized catalytic Pt—Sn/TiO2 coatings on the inner surface of a capillary microreactor during adsorption of polynuclear carbonyl Pt—Sn complexes on mesoporous TiO2. Titanium oxide sol prepared in the presence of template (Pluronic F127 surfactant) is supported in a dynamic mode. Pt—Sn bimetallic catalysts with an average particle size of 1.5—2 nm are synthesized by adsorption of the bimetallic [Pt3(CO)3(SnCl3)2(SnCl2H2O)] complex followed by thermal treatment. Physicochemical properties of samples (thickness, structure and morphology, chemical composition of the material, electronic state, surface area, pore volume and size distribution) are characterized by a set of methods (HR TEM, SEM, powder XRD, XRF, XPS, low-temperature nitrogen adsorption). Conditions for preparing the uniform Pt—Sn/TiO2 coating on the inner surface of a silica capillary with good adhesion are determined. To increase the TiO2 thickness multilayered TiO2 films have been synthesized by a layer-by-layer deposition. The coating thickness is found to increase with increasing the capillary diameter. The coating of a capillary with a diameter of 0.55 mm after 14-fold deposition is characterized by a thickness of 2 μm and an average pore size of 5.4 nm. The solvent effect on adsorption of Pt—Sn carbonyl complexes into TiO2 support is studied. The amount of the adsorbed complex increases in the following order: ethanol < acetone tetrahydrofuran. The physicochemical properties of the active component (surface concentration, dispersion, and composition) can be fine-tuned by the deposition method, precursor concentration in the initial solution, and condtions of activation. The catalyst activity in citral hydrogenation was 0.06—0.54 min–1 with the selectivity to the unsaturated alcohols as higher as 90 % at a citral conversion above 95 %.
Cite:
Okhlopkova L.B.
, Matus E.V.
, Ismagilov I.Z.
, Kerzhentsev M.A.
, Prosvirin I.P.
, Ismagilov Z.R.
Synthesis of Mesoporous Bimetallic Pt–Sn Catalytic Coatings from Polynuclear Precursors for Fine Organic Synthesis Processes
Journal of Structural Chemistry. 2013. V.54. N6. P.1034-1043. DOI: 10.1134/S0022476613060061 WOS Scopus РИНЦ ANCAN OpenAlex
Synthesis of Mesoporous Bimetallic Pt–Sn Catalytic Coatings from Polynuclear Precursors for Fine Organic Synthesis Processes
Journal of Structural Chemistry. 2013. V.54. N6. P.1034-1043. DOI: 10.1134/S0022476613060061 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Охлопкова Л.Б.
, Матус Е.В.
, Исмагилов И.З.
, Керженцев М.А.
, Просвирин И.П.
, Исмагилов З.Р.
Синтез мезопористых биметаллических Pt-Sn каталитических покрытий из полиядерных предшественников для процессов тонкого органического синтеза
Журнал структурной химии. 2013. Т.54. №6. С.1003-1012. RSCI РИНЦ
Синтез мезопористых биметаллических Pt-Sn каталитических покрытий из полиядерных предшественников для процессов тонкого органического синтеза
Журнал структурной химии. 2013. Т.54. №6. С.1003-1012. RSCI РИНЦ
Dates:
| Submitted: | Jun 30, 2012 |
| Published print: | Nov 1, 2013 |
| Published online: | Jan 4, 2014 |
Identifiers:
| Web of science: | WOS:000329247700006 |
| Scopus: | 2-s2.0-84898604554 |
| Elibrary: | 21466111 |
| Chemical Abstracts: | 2014:26684 |
| Chemical Abstracts (print): | 160:577491 |
| OpenAlex: | W2075971694 |