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  Physico-chemical characterization of Ni/MCM-41 synthesized by a template ion exchange approach

Lehmann, T., Wolff, T., Hamel, C., Veit, P., Garke, B., & Seidel-Morgenstern, A. (2012). Physico-chemical characterization of Ni/MCM-41 synthesized by a template ion exchange approach. Microporous and Mesoporous Materials, 151, 113-125. doi:10.1016/j.micromeso.2011.11.006.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-899D-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-B377-4
Genre: Journal Article

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 Creators:
Lehmann, T.1, Author
Wolff, T.2, Author              
Hamel, C.1, 2, Author              
Veit, P.1, Author
Garke, B.1, Author
Seidel-Morgenstern, A.1, 2, Author              
Affiliations:
1Otto-von-Guericke-Universität Magdeburg, External Organizations, ou_1738156              
2Physical and Chemical Foundations of Process Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Max Planck Society, ou_1738150              

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Free keywords: template ion exchange, MCM-41, nickel phyllosilicate, deposition-precipitation, acidity
 Abstract: 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]

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Language(s): eng - English
 Dates: 2012
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 573291
Other: 24/12
DOI: 10.1016/j.micromeso.2011.11.006
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Title: Microporous and Mesoporous Materials
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 151 Sequence Number: - Start / End Page: 113 - 125 Identifier: ISSN: 1387-1811
CoNE: /journals/resource/954926228401