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Clays pillared by zirconia nanoparticles: structure, adsorption and catalytic properties

Published online by Cambridge University Press:  15 February 2011

Vladislav A. Sadykov ,
Tatyana G. Kuznetsova ,
Rimma V. Bunina ,
Natalya V. Mezentseva ,
Dmitrii K. Efremov ,
Vasilii I. Avdeev ,
Vladimir P. Doronin ,
Vladimir L. Kuznetsov ,
Aleksander M. Volodin  and
Eugenii A. Paukshtis
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Vladislav A. Sadykov
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Tatyana G. Kuznetsova
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Rimma V. Bunina
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Natalya V. Mezentseva
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Dmitrii K. Efremov
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Vasilii I. Avdeev
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Vladimir P. Doronin
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Vladimir L. Kuznetsov
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Aleksander M. Volodin
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Eugenii A. Paukshtis
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Galina M. Alikina
Affiliation:
Boreskov Institute of Catalysis SB RAS, pr. Lavrentieva, 5, 630090, Novosibirsk; [email protected]
Valerii A. Matyshak
Affiliation:
Semenov Institute of Chemical Physics, Moscow, Russia
Valerii V. Lunin
Affiliation:
Chemical Department of Moscow State University, Moscow, Russia;
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Abstract

Modeling of high resolution nitrogen adsorption isotherms by the Grand Canonical Monte Carlo (GCMC) method for zirconia-pillared clays containing 20 wt.% of ZrO2 revealed that the pillars are comprised of separate Zr4(μ-OH)8(OH)m (H2O)n units (Zr4 tetramers) and their dimers (Zr8 complexes) as sheets or loose 3D structures. This agrees with the results of modeling of the condensation process in solution using the Density Functional Theory approach (DFT) and the semiempirical PM3 method. Bridging and terminal hydroxyls strongly bound with Zr cations are involved in anchoring supported Cu cations and Pt. This nanostructure of the active component as well as the developed micro- and mesoporosity appear to be responsible for the high performance of Pt+Cu/ZrPILC catalysts in the NOx selective reduction by propylene and decane in realistic feeds.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 876: Symposium A – Nanoporous and Nanostructured Materials for Catalysis, Sensor and Gas Separation Applications , 2005 , R8.21
Copyright
Copyright © Materials Research Society 2005

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