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Insights into the reversible oxygen reduction reaction in a series of phosphonium-based ionic liquids

Pozo-Gonzalo,C, Howlett,PC, Hodgson,JL, Madsen,LA, MacFarlane,DR and Forsyth,M 2014, Insights into the reversible oxygen reduction reaction in a series of phosphonium-based ionic liquids, Physical chemistry chemical physics, vol. 16, no. 45, pp. 25062-25070, doi: 10.1039/c4cp04101a.

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Title Insights into the reversible oxygen reduction reaction in a series of phosphonium-based ionic liquids
Author(s) Pozo-Gonzalo,CORCID iD for Pozo-Gonzalo,C orcid.org/0000-0002-7890-6457
Howlett,PCORCID iD for Howlett,PC orcid.org/0000-0002-2151-2932
Hodgson,JL
Madsen,LA
MacFarlane,DR
Forsyth,MORCID iD for Forsyth,M orcid.org/0000-0002-4273-8105
Journal name Physical chemistry chemical physics
Volume number 16
Issue number 45
Start page 25062
End page 25070
Publisher Royal Society of Chemistry
Place of publication Cambridge, England
Publication date 2014-10-22
ISSN 1463-9084
Keyword(s) Science & Technology
Physical Sciences
Chemistry, Physical
Physics, Atomic, Molecular & Chemical
Chemistry
Physics
TEMPERATURE MOLTEN-SALT
SUPEROXIDE ION
ELECTROCHEMICAL REDUCTION
BATTERY ELECTROLYTES
IMIDAZOLIUM-CATION
AIR BATTERIES
LI-AIR
WATER
DIOXYGEN
ELECTROREDUCTION
Summary New findings supporting the stability of the superoxide ion, O2˙(-), in the presence of the phosphonium cation, [P6,6,6,14](+), are presented. Extended electrochemical investigations of a series of neat phosphonium-based ILs with different anions, including chloride, bis(trifluoromethylsulfonyl)imide and dicyanamide, demonstrate the chemical reversibility of the oxygen reduction process. Quantum chemistry calculations show a short intermolecular distance (r = 3.128 Å) between the superoxide ion and the phosphonium cation. NMR experiments have been performed to assess the degree of long term degradation of [P6,6,6,14](+), in the presence of superoxide and peroxide species, showing no chemically distinct degradation products of importance in reversible air cathodes.
Language eng
DOI 10.1039/c4cp04101a
Field of Research 091205 Functional Materials
030604 Electrochemistry
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
Grant ID CE0561616
Copyright notice ©2014, Royal Society of Chemistry
Persistent URL http://hdl.handle.net/10536/DRO/DU:30068246

Document type: Journal Article
Collection: Institute for Frontier Materials
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Created: Tue, 16 Dec 2014, 10:37:29 EST

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