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Inorganics 2014, 2(1), 16-28; doi:10.3390/inorganics2010016
Article

Investigation into the Incorporation of Phosphate into BaCe1−yAyO3−y/2 (A = Y, Yb, In)

 and
*
School of Chemistry, University of Birmingham, Birmingham B15 2TT, UK
* Author to whom correspondence should be addressed.
Received: 26 November 2013 / Revised: 23 January 2014 / Accepted: 24 January 2014 / Published: 29 January 2014
(This article belongs to the Special Issue Energy Storage and Conversion)
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Abstract

In this paper we examine the effect of doping phosphate into BaCe1−yAyO3−y/2 (A = Y, Yb, In). The samples were analysed through a combination of X-ray diffraction, TGA, Raman spectroscopy and conductivity measurements. The results showed that phosphate could be incorporated into this system up to the 10% doping level, although this required an increased Y/Yb/In content, e.g., BaCe0.6(Y/In/Yb)0.3P0.1O2.9. The phosphate doping was, however, shown to lead to a decrease in conductivity; although at low phosphate levels high conductivities were still observed, e.g., for BaCe0.65Y0.3P0.05O2.875, σ = 4.3 × 10−3 S cm−1 at 600 °C in wet N2. In terms of the effect of phosphate incorporation on the CO2 stability, it was shown to lead to a small improvement for the In containing samples, whereas the yttrium doped compositions showed no change in CO2 stability.
Keywords: perovskite; proton conductor; phosphate; cerate; oxyanions perovskite; proton conductor; phosphate; cerate; oxyanions
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Smith, A.D.; Slater, P.R. Investigation into the Incorporation of Phosphate into BaCe1−yAyO3−y/2 (A = Y, Yb, In). Inorganics 2014, 2, 16-28.

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