Reduction of oxygen in a trialkoxy ammonium-based ionic liquid and the role of water

Pozo-Gonzalo, Cristina, Kar, Mega, Jónsson, Erlendur, Howlett, Patrick C., MacFarlane, Douglas R. and Forsyth, Maria 2016, Reduction of oxygen in a trialkoxy ammonium-based ionic liquid and the role of water, Electrochimica acta, vol. 196, pp. 727-734, doi: 10.1016/j.electacta.2016.02.208.

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Title Reduction of oxygen in a trialkoxy ammonium-based ionic liquid and the role of water
Author(s) Pozo-Gonzalo, CristinaORCID iD for Pozo-Gonzalo, Cristina
Kar, Mega
Jónsson, Erlendur
Howlett, Patrick C.ORCID iD for Howlett, Patrick C.
MacFarlane, Douglas R.
Forsyth, MariaORCID iD for Forsyth, Maria
Journal name Electrochimica acta
Volume number 196
Start page 727
End page 734
Total pages 8
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-04-01
ISSN 0013-4686
Summary The oxygen reduction reaction in a novel trialkoxy ammonium-based ionic liquid, N-ethyl-2-(2-methoxyethoxy)-N,N-bis(2-(2-methoxyethoxy)ethyl)ethan-1-aminium bis(trifluoromethylsulfonyl)imide, [N2(20201)(20201)(20201)] [NTf2] has been studied on glassy carbon and gold electrodes, showing faster electrokinetics on glass carbon because of weaker adsorption of the IL. This has been demonstrated by theoretical calculations and electrochemical studies. In the neat IL, the oxygen is reduced to superoxide (O2 -) through a one electron process; however, better performance is attained in the presence of water (42 mol%), in terms of current density, and onset potential of the reduction process via a reversible 2-electron process. Furthermore, a remarkable increase in cyclic coulombic efficiency is observed for the wet IL (66% in comparison with the neat IL (24%), showing the practicality of a reversible O2/H2O2 system for energy storage.
Language eng
DOI 10.1016/j.electacta.2016.02.208
Field of Research 030102 Electroanalytical Chemistry
091205 Functional Materials
090607 Power and Energy Systems Engineering (excl Renewable Power)
03 Chemical Sciences
09 Engineering
02 Physical Sciences
Socio Economic Objective 850602 Energy Storage (excl. Hydrogen)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
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