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Evidence of Variations in Atomic Distribution in Disordered Mixed Metal Hydroxides

Published online by Cambridge University Press:  29 July 2019

Wen Rong ,
Sarah Stepan  and
Rodney D. L. Smith Open the ORCID record for Rodney D. L. Smith [Opens in a new window]
Wen Rong
Affiliation:
Department of Chemistry, University of Waterloo, Waterloo, Canada
Sarah Stepan
Affiliation:
Department of Chemistry, University of Waterloo, Waterloo, Canada
Rodney D. L. Smith*
Affiliation:
Department of Chemistry, University of Waterloo, Waterloo, Canada Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Canada
*
*(Email: rodsmith@uwaterloo.ca)
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Abstract

Numerous fabrication protocols are known to yield transition metal oxides with structures related to layered double hydroxides, but the effect of fabrication protocol on the uniformity of mixed-metal compositions remain largely unexplored. We have analysed the apparent solubility limits and the structural implications of iron ions in nickel hydroxide lattices for materials prepared by four different fabrication protocols. Opposing shifts in the (100) and (001) reflection in powder X-ray diffraction results revealed a contraction of the nickel lattice upon successful incorporation of iron, with Ni-M distances exhibiting an apparently linear decrease with respect to iron content. This feature revealed the amount of iron incorporated into nickel-based materials to be dependent on fabrication protocol, varying from apparently negligible concentrations to over fifty atomic percent. The dependency of structure on fabrication protocols provides a handle to improve fundamental understanding of catalytically relevant coordination environments.

Keywords

crystallographic structureheterogenoussyntheticcatalytic
Type
Articles
Information
MRS Advances , Volume 4 , Issue 33-34: Energy and Sustainability , 2019 , pp. 1843 - 1850
Copyright
Copyright © Materials Research Society 2019 

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