2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 11: New and Advanced Materials, Technologies, and Manufacturing
| Editors: | F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 174 pages |
| ISBN: | 978-1-989820-10-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Polyoxometalate Chemistry in Carbon Nanotubes
Graham Newton1; Jack Jordan1; Andrei Khlobystov1; Darren Walsh1;1UNIVERSITY OF NOTTINGHAM, Nottingham, United Kingdom;
Type of Paper: Regular
Id Paper: 253
Topic: 43
Abstract:
Polyoxometalates (POMs) have received considerable attention in recent years due to their rich redox properties and potential applications in energy storage.[1] Due to their discrete nature, the use of POMs as components in energy storage devices relies on their stable combination with conductive supports.[2] Carbon nanotubes (CNTs) are stable, hollow cylinders made entirely of carbon. These nanostructured carbons are highly conductive, mechanically strong and can be functionalized.[3] By encapsulating molecular materials within CNTs, their properties can be enhanced.
This work describes the first report of the encapsulation of the Keggin [PW12O40]3- and Wells-Dawson [P2W18O62]6- heteropolyanions within carbon nanotubes (CNTs), along with detailed structural, chemical and electronic characterizations. Transmission electron microscopy (TEM) confirms the presence of encapsulated POMs, as well as provides the necessary energy to perform observable chemical transformations within the CNTs. Access to POM redox properties from within the CNT upon encapsulation is described. The POM electrochemistry is shown to be stabilized across a greater range of conditions and cycles than typically possible. Using Raman spectroscopy, investigations probe the electronic coupling between the host and guest, showing electron transfer between the two.
Keywords:
New and advanced materials;References:
1. Sadakane, M.; Steckhan, E., Electrochemical Properties of Polyoxometalates as Electrocatalysts. Chem. Rev. 1998, 98 (1), 219-238.2. Song, Y.-F.; Tsunashima, R., Recent advances on polyoxometalate-based molecular and composite materials. Chem. Soc. Rev. 2012, 41 (22), 7384-7402.
3. Miners, S. A.; Rance, G. A.; Khlobystov, A. N., Chemical reactions confined within carbon nanotubes. Chem. Soc. Rev. 2016, 45 (17), 4727-4746.