Evidence of Oxygen Intercalation and Mobility at Room Temperature in Oxides:  An Electrochemical Quartz Microbalance Study of Intercalation in La2CuO4

This paper offers direct evidence for the electrochemical intercalation of oxygen in an oxide with the K2NiF4 structure, namely, La2CuO4, at room temperature. Organic solvents, as well as water, allow that reaction to occur. The charge-to-mass ratio evaluated from a comparison with fluoride intercal...

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Bibliographic Details
Published in:Chemistry of materials 2001-06, Vol.13 (6), p.2118-2126
Main Authors: Casañ-Pastor, N, Zinck, C, Michel, C. R, Tejada-Rosales, E. M, Torres-Gómez, G
Format: Article
Language:English
Subjects:
Chemistry
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Other electrodes
Online Access:Get full text
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Summary:This paper offers direct evidence for the electrochemical intercalation of oxygen in an oxide with the K2NiF4 structure, namely, La2CuO4, at room temperature. Organic solvents, as well as water, allow that reaction to occur. The charge-to-mass ratio evaluated from a comparison with fluoride intercalation implies that either OH- or Oδ- species are being intercalated. Comparison with previous work seems to favor the latter. If an oxygen with lower charge is moving, that could indeed explain why oxygen conductivity can be observed at such low temperatures.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm001404t