Interaction of Platinum and Molybdophosphoric Heteropoly Acid under Conditions of Catalyst Preparation for Benzene Oxidation to Phenol with an O2–H2 Gas Mixture Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2006, Volume: 47, Number: 5, Pages: 704-714 Pages count : 11 DOI: 10.1134/S0023158406050089 | ||||
| Tags | Platinum Group Metal; Platinum Metal; HETEROPOLY Acid; Association Species; Keggin Structure | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 03-03-32787 |
| 2 | Council for Grants of the President of the Russian Federation | НШ-2287.2003.3 |
Abstract:
The transformations of platinum and a heteropoly acid (HPA) in binary systems prepared from H2PtCl6 or H2PtCl4 and H3PMo12O40 were studied using IR and UV-VIS spectroscopy, elemental analysis, XPS, EXAFS, TPR, and HREM. The calcination of platinum chloride with the HPA to 450°C resulted in the formation of a platinum salt of the HPA along with decomposition products (mixture I). The reduction of calcined samples containing Pt: HPA = 1: 1 with hydrogen at 300°C (mixture II) followed by exposure to air resulted in the regeneration of the HPA structure. The resulting solid samples of Pt 1−n 0 Pt n II ClmOxHy) (H3+p PMo 12−p VI Mo p V O40) (III) contained platinum and molybdenum in both oxidized and reduced states. The following association species were isolated from mixtures I and II by dissolving in water: [Pt n II PMo12O40] (I s) (n = 0.3−0.8) and [Pt n 0 PMo 12 red O40] (II s) (n ≈ 1). Under exposure to air, the solutions of I s were stable (pH ∼2), whereas Ptmet was released from II s. After the drying of I s, the solid association species (Pt n II ClmOxHy). (H3PMo12O40), where n = 0.3−0.8, m = 0.2−1, and x = 3−0, (I solid) were obtained. The I solid/SiO2 supported samples were prepared by impregnating SiO2 with a solution of I s and drying at 100°C. Platinum metal particles of size ∼20 Å and a mixed-valence association species of platinum with the HPA were observed after the reduction of I solid/SiO2 with hydrogen at 100–250°C. These samples were active in the gas-phase oxidation of benzene to phenol at 180°C with the use of an O2-H2-N2 mixture.
Cite:
Kuznetsova L.I.
, Kuznetsova N.I.
, Koshcheev S.V.
, Rogov V.A.
, Zaikovskii V.I.
, Novgorodov B.N.
, Detusheva L.G.
, Likholobov V.A.
, Kochubey D.I.
Interaction of Platinum and Molybdophosphoric Heteropoly Acid under Conditions of Catalyst Preparation for Benzene Oxidation to Phenol with an O2–H2 Gas Mixture
Kinetics and Catalysis. 2006. V.47. N5. P.704-714. DOI: 10.1134/S0023158406050089 WOS Scopus РИНЦ ANCAN OpenAlex
Interaction of Platinum and Molybdophosphoric Heteropoly Acid under Conditions of Catalyst Preparation for Benzene Oxidation to Phenol with an O2–H2 Gas Mixture
Kinetics and Catalysis. 2006. V.47. N5. P.704-714. DOI: 10.1134/S0023158406050089 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Кузнецова Л.И.
, Кузнецова Н.И.
, Кощеев С.В.
, Рогов В.А.
, Зайковский В.И.
, Новгородов Б.Н.
, Детушева Л.Г.
, Лихолобов В.А.
, Кочубей Д.И.
Взаимодействие платины и фосфорномолибденовой гетерополикислоты в условиях приготовления катализатора для окисления бензола в фенол смесью газов O2/H2
Кинетика и катализ. 2006. Т.47. №5. С.728-737. RSCI РИНЦ
Взаимодействие платины и фосфорномолибденовой гетерополикислоты в условиях приготовления катализатора для окисления бензола в фенол смесью газов O2/H2
Кинетика и катализ. 2006. Т.47. №5. С.728-737. RSCI РИНЦ
Dates:
| Submitted: | Mar 9, 2005 |
| Published print: | Sep 1, 2006 |
Identifiers:
| Web of science: | WOS:000241045200008 |
| Scopus: | 2-s2.0-33749382582 |
| Elibrary: | 13506820 |
| Chemical Abstracts: | 2006:1026889 |
| Chemical Abstracts (print): | 147:74625 |
| OpenAlex: | W2069411193 |