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ID: 573291.1, MPI für Dynamik komplexer technischer Systeme / Physical and Chemical Foundations of Process Engineering
Physico-chemical characterization of Ni/MCM-41 synthesized by a template ion exchange approach
Authors:Lehmann, T.; Wolff, T.; Hamel, C.; Veit, P.; Garke, B.; Seidel-Morgenstern, A.
Language:English
Date of Publication (YYYY-MM-DD):2012
Title of Journal:Microporous & Mesoporous Materials
Volume:151
Start Page:113
End Page:125
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:A template ion exchange approach has been employed to prepare Ni/MCM-41 with varying nickel loadings. The synthesized samples were studied by nitrogen physisorption, X-ray diffraction, atomic absorption spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, temperature-programmed reduction and Fourier transform infrared spectroscopy. Extensive compound formation was found to result from the adopted preparation method. The Ni(II) phase was elucidated to be a nickel silicate with layer structure. Corresponding layers were comprised of an octahedral Ni(II) sheet in between two tetrahedral SiO4 sheets. Nickel compound formation was accompanied by simultaneous dissolution of the support material. The nickel phase was most likely deposited onto the external surface of the MCM-41 particles. Temperature-programmed desorption of ammonia was used to investigate the influence of nickel content on acidity. Moderate acidity was found for the undoped support material. Introduction of nickel led to the formation of two additional types of acid sited with weak and moderate acidity characteristics.

Copyright © 2011 Elsevier Inc. All rights reserved. [accessed December 7th 2011]
Free Keywords:template ion exchange, MCM-41, nickel phyllosilicate, deposition-precipitation, acidity
External Publication Status:published
Document Type:Article
Communicated by:Andreas Seidel-Morgenstern
Affiliations:MPI für Dynamik komplexer technischer Systeme/Physical and Chemical Foundations of Process Engineering
External Affiliations:Otto-von-Guericke-Universität Magdeburg,
Institut für Verfahrenstechnik,
39106 Magdeburg, Germany

Otto-von-Guericke-Universität Magdeburg,
Institut für Experimentelle Physik,
39106 Magdeburg, Germany
Identifiers:LOCALID:24/12
URL:http://dx.doi.org/10.1016/j.micromeso.2011.11.006
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