Effect of Hydrothermal Treatment on the Composition and Structure of Pt(IV) Hydroxo Complexes As Model Precursors of the Active Component in Pt/Al2O3 Catalysts

Effect of Hydrothermal Treatment on the Composition and Structure of Pt(IV) Hydroxo Complexes As Model Precursors of the Active Component in Pt/Al2O3 Catalysts Full article

Journal

Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210

Output data

Year: 2009, Volume: 50, Number: 6, Pages: 880-885 Pages count : 6 DOI: 10.1134/S0023158409060147

Authors

Belʹskaya O.B. ¹ , Drozdov V.A. ¹ , Gulyaeva T.I. ¹ , Arbuzov A.B. ¹ , Moroz E.M. ² , Zyuzin D.A. ² , Paukshtis E.A. ² , Larina T.V. ² , Duplyakin V.K. ²

Affiliations

1	Institute of Hydrocarbon Processing, Siberian Branch, Russian Academy of Sciences, Omsk, 644040 Russia
2	Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia

The influence of hydrothermal treatment conditions (temperature, duration, acidity of the medium) on the structural and chemical transformations of the complex H2[Pt(OH)6] was studied. The composition and structure of the resulting compounds were determined by several hysicochemical methods. Thermal analysis coupled with mass spectrometry showed that, as the hydrothermal treatment temperature is raised from 25 to 120 and 150°C, the product composition in terms of empirical formulas changes as follows: PtO2 ⋅ 4H2O PtO2 ⋅ 3.5H2O PtO2 ⋅ 1.5H2O. Xray diffraction and UV and IR spectroscopy demonstrated that the changes in the chemical composition are accompanied by the amorphization of the structure and Pt–O bond strengthening. Xray structure determination using the radial electron density distribution method showed that polynuclear species ~10–15 Å in size with a structure similar to that of orthorhombic PtO2 form in the complexes subjected to “hard” hydrothermal treatment (T ≥ 150°C).

Belʹskaya O.B. , Drozdov V.A. , Gulyaeva T.I. , Arbuzov A.B. , Moroz E.M. , Zyuzin D.A. , Paukshtis E.A. , Larina T.V. , Duplyakin V.K.
Effect of Hydrothermal Treatment on the Composition and Structure of Pt(IV) Hydroxo Complexes As Model Precursors of the Active Component in Pt/Al2O3 Catalysts
Kinetics and Catalysis. 2009. V.50. N6. P.880-885. DOI: 10.1134/S0023158409060147 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Oct 14, 2008
Published print:	Oct 31, 2009
Published online:	Dec 22, 2009

Web of science:	WOS:000274742300014
Scopus:	2-s2.0-75749095576
Elibrary:	15300759
Chemical Abstracts:	2010:34204
Chemical Abstracts (print):	154:143008
OpenAlex:	W2034599582

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Elibrary	1
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