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Basbus J, Arce M, Troiani H, Prado F, Mogni L, Serquis A. Characterization of the high temperature properties of BaCe 0.4Zr 0.4Pr 0.2O 3−δ perovskite as a potential material for PC-SOFCs. NEW J CHEM 2021. [DOI: 10.1039/d1nj02197d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work presents a systematic study of the high temperature properties of BaCe0.4Zr0.4Pr0.2O3−δ perovskite in view of its potential application in proton conducting solid oxide fuel cells.
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Affiliation(s)
- Juan Basbus
- Centro Atómico Bariloche (CAB)
- INN-CNEA-CONICET
- Río Negro
- Argentina
| | - Mauricio Arce
- Centro Atómico Bariloche (CAB)
- INN-CNEA-CONICET
- Río Negro
- Argentina
- Energy Materials In-situ Laboratory (EMIL)
| | - Horacio Troiani
- Centro Atómico Bariloche (CAB)
- INN-CNEA-CONICET
- Río Negro
- Argentina
| | - Fernando Prado
- Departamento de Física
- Universidad Nacional del Sur and Instituto de Física
- CONICET
- Bahía Blanca
- Argentina
| | - Liliana Mogni
- Centro Atómico Bariloche (CAB)
- INN-CNEA-CONICET
- Río Negro
- Argentina
| | - Adriana Serquis
- Centro Atómico Bariloche (CAB)
- INN-CNEA-CONICET
- Río Negro
- Argentina
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Heras-Juaristi G, Amador U, Romero de Paz J, Fuentes RO, Chinelatto AL, Ritter C, Fagg DP, Pérez-Coll D, Mather GC. Structures, Phase Fields, and Mixed Protonic-Electronic Conductivity of Ba-Deficient, Pr-Substituted BaZr 0.7Ce 0.2Y 0.1O 3-δ. Inorg Chem 2018; 57:15023-15033. [PMID: 30444118 DOI: 10.1021/acs.inorgchem.8b02956] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The BaZr0.7Ce0.2Y0.1O3-δ-BaPrO3-δ perovskite system, of interest for high-temperature electrochemical applications involving mixed protonic-electronic conductivity, forms a solid-solution with a wide interval of Ba substoichiometry in the range Ba(Ce0.2Zr0.7)1- xPr xY0.1O3-δ, 0 ≤ x ≤ 1. Structural phase transitions mapped as a function of temperature and composition by high-resolution neutron powder diffraction and synchrotron X-ray diffraction reveal higher symmetry for lower Pr content and higher temperatures, with the largest stability field observed for rhombohedral symmetry (space group, R3̅ c). Rietveld refinement, supported by magnetic-susceptibility measurements, indicates that partitioning of the B-site cations over the A and B perovskite sites compensates Ba substoichiometry in preference to A-site vacancy formation and that multiple cations are distributed over both sites. Electron-hole transport dominates electrical conductivity in both wet and dry oxidizing conditions, with total conductivity reaching a value of ∼0.5 S cm-1 for the x = 1 end-member in dry air at 1173 K. Higher electrical conductivity and the displacement of oxygen loss to higher temperatures with increasing Pr content both reflect the role of Pr in promoting hole formation at the expense of oxygen vacancies. In more reducing conditions (N2) and at low Pr contents, conductivity is higher in humidified atmospheres (∼0.023 atm pH2O) indicating a protonic contribution to transport, whereas the greater electron-hole conductivity with increasing Pr content results in lower conductivity in humidified N2 due to the creation of protonic defects and the consumption of holes.
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Affiliation(s)
| | - Ulises Amador
- Facultad de Farmacia, Departamento de Quı́mica , Universidad CEU-San Pablo , Boadilla del Monte , Madrid 28668 , Spain
| | - Julio Romero de Paz
- C.A.I. Técnicas Físicas, Facultad de Ciencias Físicas , Universidad Complutense , 28040 Madrid , Spain
| | - Rodolfo O Fuentes
- Departamento de Física de la Materia Condensada , CNEA , Av. Gral. Paz 1499 , 1650 Buenos Aires , Argentina
| | - Adilson L Chinelatto
- Departamento de Engenharia de Materiais , Universidade Estadual de Ponta Grossa , Av. Gal. Carlos Cavalcanti, 4748 , 84030-900 Ponta Grossa , PR , Brazil
| | - Clemens Ritter
- Institut Laue-Langevin , 71 Avenue des Martyrs , Grenoble 38042 , France
| | - Duncan P Fagg
- Department of Mechanical Engineering , University of Aveiro , 3810-193 Aveiro , Portugal
| | - Domingo Pérez-Coll
- Instituto de Cerámica y Vidrio , CSIC , Cantoblanco , 28049 Madrid , Spain
| | - Glenn C Mather
- Instituto de Cerámica y Vidrio , CSIC , Cantoblanco , 28049 Madrid , Spain
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Antunes I, Amador U, Alves A, Correia MR, Ritter C, Frade JR, Pérez-Coll D, Mather GC, Fagg DP. Structure and Electrical-Transport Relations in Ba(Zr,Pr)O3−δ Perovskites. Inorg Chem 2017; 56:9120-9131. [DOI: 10.1021/acs.inorgchem.7b01128] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Ulises Amador
- Departamento de
Quı́mica, Quimica Facultad de Farmacia, Universidad CEU-San Pablo, Boadilla del Monte, Madrid 28668, Spain
| | | | | | - Clemens Ritter
- Institut Laue-Langevin, 71 Avenue
des Martyrs, Grenoble 38042, France
| | | | | | - Glenn C. Mather
- Instituto de Cerámica y Vidrio, CSIC, Cantoblanco, 28049 Madrid, Spain
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