2007
DOI: 10.1039/b618345j
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Rapid oxygen ion diffusion and surface exchange kinetics in PrBaCo2O5+x with a perovskite related structure and ordered A cations

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Cited by 552 publications
(357 citation statements)
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“…1,3,5 Recently, using electrical conductivity relaxation ͑ECR͒ and thermogravimetric analysis on bulk ceramic materials, we have found that PrBaCo 2 O 5+␦ ͑PBCO͒ has unusually rapid oxygen transport kinetics at low temperatures ͑300-500°C͒, suggesting its application as a cathode in SOFCs. 6 Similar results have been reported recently for GdBaCo 2 O 5.5+␦ . 7 To study electrode behavior, most of the previous studies have used porous electrodes, where uncertainties in the microstructure can lead to difficulties in interpretation of experimental results.…”
supporting
confidence: 80%
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“…1,3,5 Recently, using electrical conductivity relaxation ͑ECR͒ and thermogravimetric analysis on bulk ceramic materials, we have found that PrBaCo 2 O 5+␦ ͑PBCO͒ has unusually rapid oxygen transport kinetics at low temperatures ͑300-500°C͒, suggesting its application as a cathode in SOFCs. 6 Similar results have been reported recently for GdBaCo 2 O 5.5+␦ . 7 To study electrode behavior, most of the previous studies have used porous electrodes, where uncertainties in the microstructure can lead to difficulties in interpretation of experimental results.…”
supporting
confidence: 80%
“…Fig. 4, we have used the values for ⌫ previously measured for bulk polycrystalline PBCO 6 to make the comparison. In summary, the oxygen surface exchange kinetics of PBCO were measured using the electrical conductivity relaxation technique and verified by an independent IEDP measurement.…”
mentioning
confidence: 99%
“…However, the chemical stability of BSCF in the presence of CO 2 and water vapor was questioned [23], indicating limits for practical applications. New materials showing promising performance, such as double perovskite or bismuth ruthenate pyrochlore, have been proposed as alternative cathodes [24,25].…”
Section: Intermediate Temperature Solid Oxide Fuel Cellsmentioning
confidence: 99%
“…At the same time, the presence of cobalt cations that can easily change their oxidation state is favorable for electron conductivity [7][8][9]. Therefore, the double perovskite cobaltites have attracted considerable interest in recent years from the researchers in the field of catalysis, adsorption and cathode materials [10][11][12][13][14][15][16][17][18][19]. It is known that the respective functional properties are tightly related with the nature of electron and ion defects in non-stoichiometric oxides, in general, and in the doubleperovskite cobaltites, in particular.…”
Section: Introductionmentioning
confidence: 99%