Voltammetric study of PrF3:Sr2+ and NdF3:Ba2+ solid electrolytes

Studies of single crystals of nonstoichiometric fluorides of PrF 3 :Sr 2+ and NdF 3 :Ba 2+ in contact with a Pt electrode were carried out using the method of voltammetry with a linear potential sweep, chronoamperometry, and cyclic voltammetry. The reaction of gaseous oxygen reduction (GOR) at the P...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2015-05, Vol.51 (5), p.429-434
Main Authors: Turaeva, M. S., Tarasenkova, I. V., Sorokin, N. I., Urchukova, M. M., Murin, I. V.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Electrochemistry
Physical Chemistry
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Summary:Studies of single crystals of nonstoichiometric fluorides of PrF 3 :Sr 2+ and NdF 3 :Ba 2+ in contact with a Pt electrode were carried out using the method of voltammetry with a linear potential sweep, chronoamperometry, and cyclic voltammetry. The reaction of gaseous oxygen reduction (GOR) at the PrF 3 :Sr 2+ /Pt interface was accompanied by appearance of mobile oxygen forms. The catalytic activity of PrF 3 :Sr 2+ with respect to gaseous oxygen, same as CeF 3 :Sr 2+ , can be explained by variable valency of praseodymium and cerium fluoride, which creates opportunities for using them in oxygen and oxygen-containing gas sensors. The GOR reaction at the NdF 3 :Ba 2+ /Pt interface appeared as a result of anodic polarization. After charging at E = 3.2 V, the NdF 3 :Ba 2+ single crystal was successfully used for fluorination of Sb and Ag. NdF 3 :Ba 2+ is most promising in devices based on reactions with participation of mobile fluoride ion in solid electrolytes, particularly, for generation of gaseous fluorine.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193515050158