Ahmed, NS, Menzel, R, Wang, Y et al. (5 more authors) (2017) Graphene-oxide-supported CuAl and CoAl layered double hydroxides as enhanced catalysts for carbon-carbon coupling via Ullmann reaction. Journal of Solid State Chemistry, 246. pp. 130-137. ISSN 0022-4596
Abstract
Two efficient catalyst based on CuAl and CoAl layered double hydroxides (LDHs) supported on graphene oxide (GO) for the carbon-carbon coupling (Classic Ullmann Homocoupling Reaction) are reported. The pure and hybrid materials were synthesised by direct precipitation of the LDH nanoparticles onto GO, followed by a chemical, structural and physical characterisation by electron microscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), surface area measurements and X-ray photoelectron spectroscopy (XPS). The GO-supported and unsupported CuAl-LDH and CoAl-LDH hybrids were tested over the Classic Ullman Homocoupling Reaction of iodobenzene. In the current study CuAl- and CoAl-LDHs have shown excellent yields (91% and 98%, respectively) at very short reaction times (25 min). GO provides a light-weight, charge complementary and two-dimensional material that interacts effectively with the 2D LDHs, in turn enhancing the stability of LDH. After 5 re-use cycles, the catalytic activity of the LDH/GO hybrid is up to 2 times higher than for the unsupported LDH.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, Elsevier. This is an author produced version of a paper published in Journal of Solid State Chemistry. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Layered double hydroxide(s); Graphine oxide; Ullmann homocouplig reaction |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Dec 2016 11:38 |
Last Modified: | 18 Nov 2017 01:38 |
Published Version: | http://doi.org/10.1016/j.jssc.2016.11.024 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jssc.2016.11.024 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:109086 |