Thermal evolution of structures and conductivity of Pr-substituted BaZr0.7Ce0.2Y0.1O3−δ: potential cathode components for protonic ceramic fuel cells
A complete solid solution forms between the perovskite proton conductor BaZr 0.7 Ce 0.2 Y 0.1 O 3− δ (BZCY72) and BaPr 0.9 Y 0.1 O 3− δ (BPY) on synthesis by the Pechini method and high-temperature annealing. Phase fields of selected members of the Ba(Zr 0.7 Ce 0.2 ) 1−( x /0.9) Pr x Y 0.1 O 3− δ se...
Gespeichert in:
| Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2018, Vol.6 (13), p.5324-5334 |
|---|---|
| Hauptverfasser: | , , , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 5334 |
|---|---|
| container_issue | 13 |
| container_start_page | 5324 |
| container_title | Journal of materials chemistry. A, Materials for energy and sustainability |
| container_volume | 6 |
| creator | Heras-Juaristi, Gemma Amador, Ulises Fuentes, Rodolfo O Chinelatto, Adilson L Romero de Paz, Julio Ritter, Clemens Fagg, Duncan P Pérez-Coll, Domingo Mather, Glenn C |
| description | A complete solid solution forms between the perovskite proton conductor BaZr
0.7
Ce
0.2
Y
0.1
O
3−
δ
(BZCY72) and BaPr
0.9
Y
0.1
O
3−
δ
(BPY) on synthesis by the Pechini method and high-temperature annealing. Phase fields of selected members of the Ba(Zr
0.7
Ce
0.2
)
1−(
x
/0.9)
Pr
x
Y
0.1
O
3−
δ
series were studied as a function of composition and temperature by high-resolution neutron powder diffraction revealing symmetry changes in the sequence
Pnma
→
Imma
→
→
Pm
3&cmb.macr;
m
. Higher symmetry is favoured for low Pr contents and high temperatures, as consideration of tolerance factor suggests. A volume contraction, ascribed to dehydration, is observed by synchrotron X-ray diffraction on heating in air for lower
x
. Magnetic measurements and structural data support the presence of Pr in the IV valence state on the perovskite B site. Thermogravimetric analysis in CO
2
to ∼1253 K indicates better chemical stability for
x
≤ 0.445, whereas decomposition occurred for higher
x
. Electrical conductivity increases by over two orders of magnitude in dry air at lower temperature from
x
= 0.225 to 0.675; total conductivity reaches a value of 0.4 S cm
−1
at 1173 K for
x
= 0.675. The series exhibits electron-hole transport with a positive pO
2
dependence which increases with temperature, consistent with participation of oxygen vacancies in charge compensation of the Y
3+
acceptor dopant. The activation energy for thermally activated hole hopping in air in the range 523-773 K decreases from ∼1 eV for BZCY72 to ∼0.4 eV for
x
= 0.675. Conductivity is generally lower in humidified N
2
and air (pH
2
O 0.023 atm) than the corresponding dry atmospheres, consistent with consumption of holes by less mobile protonic species; however for
x
≤ 0.225 the lower concentration of electron holes concomitant with higher oxygen-vacancy content in N
2
results in slightly higher conductivity in wet conditions due to hydration of vacancies.
Pr doping in BZCY72 induces symmetry changes and enhances mixed-conductivity for electrochemical applications, with Pr concentration influencing the charge-compensation mechanism. |
| doi_str_mv | 10.1039/c7ta09570h |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_rsc_p</sourceid><recordid>TN_cdi_proquest_journals_2018864881</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2018864881</sourcerecordid><originalsourceid>FETCH-LOGICAL-p293t-146a66082d7cd94187cd309488781e696e83076ea0118f9f5ca88154513b8e523</originalsourceid><addsrcrecordid>eNp9kLtOwzAUhi0EEhV0YUcyYk6x48Sx2aDiJlUqQxlgiVznRE2VxsGXSn0DZiYehOfgIXgSjIpgw8t_Lp_-c44ROqJkRAmTZ7rwisi8IIsdNEhJTpIik3z3NxZiHw2dW5L4BCFcygF6my3ArlSLYW3a4BvTYVNj523QPlhwWHUV1qarYt6sG7_5bt_bxIW5840PHip8qZ4sGRVjIKP0Me4yZZ8vrx_v57g3HjrfRHet_MJUEJ1Wveli0eHaWNxb403XaKzBqlXUOkCEoW3dIdqrVetg-KMH6OH6aja-TSbTm7vxxSTpU8l8QjOuOCcirQpdyYyKKIzIeGshKHDJQTBScFCEUlHLOtdKCJpnOWVzAXnKDtDp1jfu8hzA-XJpgu3iyDIlVAgerWikTraUdbrsbbNSdlP-_XfZV3Vkjv9j2Bciy4Dy</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2018864881</pqid></control><display><type>article</type><title>Thermal evolution of structures and conductivity of Pr-substituted BaZr0.7Ce0.2Y0.1O3−δ: potential cathode components for protonic ceramic fuel cells</title><source>Royal Society Of Chemistry Journals 2008-</source><creator>Heras-Juaristi, Gemma ; Amador, Ulises ; Fuentes, Rodolfo O ; Chinelatto, Adilson L ; Romero de Paz, Julio ; Ritter, Clemens ; Fagg, Duncan P ; Pérez-Coll, Domingo ; Mather, Glenn C</creator><creatorcontrib>Heras-Juaristi, Gemma ; Amador, Ulises ; Fuentes, Rodolfo O ; Chinelatto, Adilson L ; Romero de Paz, Julio ; Ritter, Clemens ; Fagg, Duncan P ; Pérez-Coll, Domingo ; Mather, Glenn C</creatorcontrib><description>A complete solid solution forms between the perovskite proton conductor BaZr
0.7
Ce
0.2
Y
0.1
O
3−
δ
(BZCY72) and BaPr
0.9
Y
0.1
O
3−
δ
(BPY) on synthesis by the Pechini method and high-temperature annealing. Phase fields of selected members of the Ba(Zr
0.7
Ce
0.2
)
1−(
x
/0.9)
Pr
x
Y
0.1
O
3−
δ
series were studied as a function of composition and temperature by high-resolution neutron powder diffraction revealing symmetry changes in the sequence
Pnma
→
Imma
→
→
Pm
3&cmb.macr;
m
. Higher symmetry is favoured for low Pr contents and high temperatures, as consideration of tolerance factor suggests. A volume contraction, ascribed to dehydration, is observed by synchrotron X-ray diffraction on heating in air for lower
x
. Magnetic measurements and structural data support the presence of Pr in the IV valence state on the perovskite B site. Thermogravimetric analysis in CO
2
to ∼1253 K indicates better chemical stability for
x
≤ 0.445, whereas decomposition occurred for higher
x
. Electrical conductivity increases by over two orders of magnitude in dry air at lower temperature from
x
= 0.225 to 0.675; total conductivity reaches a value of 0.4 S cm
−1
at 1173 K for
x
= 0.675. The series exhibits electron-hole transport with a positive pO
2
dependence which increases with temperature, consistent with participation of oxygen vacancies in charge compensation of the Y
3+
acceptor dopant. The activation energy for thermally activated hole hopping in air in the range 523-773 K decreases from ∼1 eV for BZCY72 to ∼0.4 eV for
x
= 0.675. Conductivity is generally lower in humidified N
2
and air (pH
2
O 0.023 atm) than the corresponding dry atmospheres, consistent with consumption of holes by less mobile protonic species; however for
x
≤ 0.225 the lower concentration of electron holes concomitant with higher oxygen-vacancy content in N
2
results in slightly higher conductivity in wet conditions due to hydration of vacancies.
Pr doping in BZCY72 induces symmetry changes and enhances mixed-conductivity for electrochemical applications, with Pr concentration influencing the charge-compensation mechanism.</description><identifier>ISSN: 2050-7488</identifier><identifier>EISSN: 2050-7496</identifier><identifier>DOI: 10.1039/c7ta09570h</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Air temperature ; Carbon dioxide ; Conductors ; Contraction ; Dehydration ; Electrical conductivity ; Electrical resistivity ; Fuel technology ; High temperature ; Magnetic measurement ; Oxygen ; Powder ; Stability analysis ; Symmetry ; Temperature ; Temperature dependence ; Temperature effects ; Thermal evolution ; Thermogravimetric analysis ; Vacancies ; X-ray diffraction</subject><ispartof>Journal of materials chemistry. A, Materials for energy and sustainability, 2018, Vol.6 (13), p.5324-5334</ispartof><rights>Copyright Royal Society of Chemistry 2018</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,4024,27923,27924,27925</link.rule.ids></links><search><creatorcontrib>Heras-Juaristi, Gemma</creatorcontrib><creatorcontrib>Amador, Ulises</creatorcontrib><creatorcontrib>Fuentes, Rodolfo O</creatorcontrib><creatorcontrib>Chinelatto, Adilson L</creatorcontrib><creatorcontrib>Romero de Paz, Julio</creatorcontrib><creatorcontrib>Ritter, Clemens</creatorcontrib><creatorcontrib>Fagg, Duncan P</creatorcontrib><creatorcontrib>Pérez-Coll, Domingo</creatorcontrib><creatorcontrib>Mather, Glenn C</creatorcontrib><title>Thermal evolution of structures and conductivity of Pr-substituted BaZr0.7Ce0.2Y0.1O3−δ: potential cathode components for protonic ceramic fuel cells</title><title>Journal of materials chemistry. A, Materials for energy and sustainability</title><description>A complete solid solution forms between the perovskite proton conductor BaZr
0.7
Ce
0.2
Y
0.1
O
3−
δ
(BZCY72) and BaPr
0.9
Y
0.1
O
3−
δ
(BPY) on synthesis by the Pechini method and high-temperature annealing. Phase fields of selected members of the Ba(Zr
0.7
Ce
0.2
)
1−(
x
/0.9)
Pr
x
Y
0.1
O
3−
δ
series were studied as a function of composition and temperature by high-resolution neutron powder diffraction revealing symmetry changes in the sequence
Pnma
→
Imma
→
→
Pm
3&cmb.macr;
m
. Higher symmetry is favoured for low Pr contents and high temperatures, as consideration of tolerance factor suggests. A volume contraction, ascribed to dehydration, is observed by synchrotron X-ray diffraction on heating in air for lower
x
. Magnetic measurements and structural data support the presence of Pr in the IV valence state on the perovskite B site. Thermogravimetric analysis in CO
2
to ∼1253 K indicates better chemical stability for
x
≤ 0.445, whereas decomposition occurred for higher
x
. Electrical conductivity increases by over two orders of magnitude in dry air at lower temperature from
x
= 0.225 to 0.675; total conductivity reaches a value of 0.4 S cm
−1
at 1173 K for
x
= 0.675. The series exhibits electron-hole transport with a positive pO
2
dependence which increases with temperature, consistent with participation of oxygen vacancies in charge compensation of the Y
3+
acceptor dopant. The activation energy for thermally activated hole hopping in air in the range 523-773 K decreases from ∼1 eV for BZCY72 to ∼0.4 eV for
x
= 0.675. Conductivity is generally lower in humidified N
2
and air (pH
2
O 0.023 atm) than the corresponding dry atmospheres, consistent with consumption of holes by less mobile protonic species; however for
x
≤ 0.225 the lower concentration of electron holes concomitant with higher oxygen-vacancy content in N
2
results in slightly higher conductivity in wet conditions due to hydration of vacancies.
Pr doping in BZCY72 induces symmetry changes and enhances mixed-conductivity for electrochemical applications, with Pr concentration influencing the charge-compensation mechanism.</description><subject>Air temperature</subject><subject>Carbon dioxide</subject><subject>Conductors</subject><subject>Contraction</subject><subject>Dehydration</subject><subject>Electrical conductivity</subject><subject>Electrical resistivity</subject><subject>Fuel technology</subject><subject>High temperature</subject><subject>Magnetic measurement</subject><subject>Oxygen</subject><subject>Powder</subject><subject>Stability analysis</subject><subject>Symmetry</subject><subject>Temperature</subject><subject>Temperature dependence</subject><subject>Temperature effects</subject><subject>Thermal evolution</subject><subject>Thermogravimetric analysis</subject><subject>Vacancies</subject><subject>X-ray diffraction</subject><issn>2050-7488</issn><issn>2050-7496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kLtOwzAUhi0EEhV0YUcyYk6x48Sx2aDiJlUqQxlgiVznRE2VxsGXSn0DZiYehOfgIXgSjIpgw8t_Lp_-c44ROqJkRAmTZ7rwisi8IIsdNEhJTpIik3z3NxZiHw2dW5L4BCFcygF6my3ArlSLYW3a4BvTYVNj523QPlhwWHUV1qarYt6sG7_5bt_bxIW5840PHip8qZ4sGRVjIKP0Me4yZZ8vrx_v57g3HjrfRHet_MJUEJ1Wveli0eHaWNxb403XaKzBqlXUOkCEoW3dIdqrVetg-KMH6OH6aja-TSbTm7vxxSTpU8l8QjOuOCcirQpdyYyKKIzIeGshKHDJQTBScFCEUlHLOtdKCJpnOWVzAXnKDtDp1jfu8hzA-XJpgu3iyDIlVAgerWikTraUdbrsbbNSdlP-_XfZV3Vkjv9j2Bciy4Dy</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>Heras-Juaristi, Gemma</creator><creator>Amador, Ulises</creator><creator>Fuentes, Rodolfo O</creator><creator>Chinelatto, Adilson L</creator><creator>Romero de Paz, Julio</creator><creator>Ritter, Clemens</creator><creator>Fagg, Duncan P</creator><creator>Pérez-Coll, Domingo</creator><creator>Mather, Glenn C</creator><general>Royal Society of Chemistry</general><scope>7SP</scope><scope>7SR</scope><scope>7ST</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>JG9</scope><scope>L7M</scope><scope>SOI</scope></search><sort><creationdate>2018</creationdate><title>Thermal evolution of structures and conductivity of Pr-substituted BaZr0.7Ce0.2Y0.1O3−δ: potential cathode components for protonic ceramic fuel cells</title><author>Heras-Juaristi, Gemma ; Amador, Ulises ; Fuentes, Rodolfo O ; Chinelatto, Adilson L ; Romero de Paz, Julio ; Ritter, Clemens ; Fagg, Duncan P ; Pérez-Coll, Domingo ; Mather, Glenn C</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p293t-146a66082d7cd94187cd309488781e696e83076ea0118f9f5ca88154513b8e523</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Air temperature</topic><topic>Carbon dioxide</topic><topic>Conductors</topic><topic>Contraction</topic><topic>Dehydration</topic><topic>Electrical conductivity</topic><topic>Electrical resistivity</topic><topic>Fuel technology</topic><topic>High temperature</topic><topic>Magnetic measurement</topic><topic>Oxygen</topic><topic>Powder</topic><topic>Stability analysis</topic><topic>Symmetry</topic><topic>Temperature</topic><topic>Temperature dependence</topic><topic>Temperature effects</topic><topic>Thermal evolution</topic><topic>Thermogravimetric analysis</topic><topic>Vacancies</topic><topic>X-ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Heras-Juaristi, Gemma</creatorcontrib><creatorcontrib>Amador, Ulises</creatorcontrib><creatorcontrib>Fuentes, Rodolfo O</creatorcontrib><creatorcontrib>Chinelatto, Adilson L</creatorcontrib><creatorcontrib>Romero de Paz, Julio</creatorcontrib><creatorcontrib>Ritter, Clemens</creatorcontrib><creatorcontrib>Fagg, Duncan P</creatorcontrib><creatorcontrib>Pérez-Coll, Domingo</creatorcontrib><creatorcontrib>Mather, Glenn C</creatorcontrib><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Environment Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><jtitle>Journal of materials chemistry. A, Materials for energy and sustainability</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Heras-Juaristi, Gemma</au><au>Amador, Ulises</au><au>Fuentes, Rodolfo O</au><au>Chinelatto, Adilson L</au><au>Romero de Paz, Julio</au><au>Ritter, Clemens</au><au>Fagg, Duncan P</au><au>Pérez-Coll, Domingo</au><au>Mather, Glenn C</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermal evolution of structures and conductivity of Pr-substituted BaZr0.7Ce0.2Y0.1O3−δ: potential cathode components for protonic ceramic fuel cells</atitle><jtitle>Journal of materials chemistry. A, Materials for energy and sustainability</jtitle><date>2018</date><risdate>2018</risdate><volume>6</volume><issue>13</issue><spage>5324</spage><epage>5334</epage><pages>5324-5334</pages><issn>2050-7488</issn><eissn>2050-7496</eissn><abstract>A complete solid solution forms between the perovskite proton conductor BaZr
0.7
Ce
0.2
Y
0.1
O
3−
δ
(BZCY72) and BaPr
0.9
Y
0.1
O
3−
δ
(BPY) on synthesis by the Pechini method and high-temperature annealing. Phase fields of selected members of the Ba(Zr
0.7
Ce
0.2
)
1−(
x
/0.9)
Pr
x
Y
0.1
O
3−
δ
series were studied as a function of composition and temperature by high-resolution neutron powder diffraction revealing symmetry changes in the sequence
Pnma
→
Imma
→
→
Pm
3&cmb.macr;
m
. Higher symmetry is favoured for low Pr contents and high temperatures, as consideration of tolerance factor suggests. A volume contraction, ascribed to dehydration, is observed by synchrotron X-ray diffraction on heating in air for lower
x
. Magnetic measurements and structural data support the presence of Pr in the IV valence state on the perovskite B site. Thermogravimetric analysis in CO
2
to ∼1253 K indicates better chemical stability for
x
≤ 0.445, whereas decomposition occurred for higher
x
. Electrical conductivity increases by over two orders of magnitude in dry air at lower temperature from
x
= 0.225 to 0.675; total conductivity reaches a value of 0.4 S cm
−1
at 1173 K for
x
= 0.675. The series exhibits electron-hole transport with a positive pO
2
dependence which increases with temperature, consistent with participation of oxygen vacancies in charge compensation of the Y
3+
acceptor dopant. The activation energy for thermally activated hole hopping in air in the range 523-773 K decreases from ∼1 eV for BZCY72 to ∼0.4 eV for
x
= 0.675. Conductivity is generally lower in humidified N
2
and air (pH
2
O 0.023 atm) than the corresponding dry atmospheres, consistent with consumption of holes by less mobile protonic species; however for
x
≤ 0.225 the lower concentration of electron holes concomitant with higher oxygen-vacancy content in N
2
results in slightly higher conductivity in wet conditions due to hydration of vacancies.
Pr doping in BZCY72 induces symmetry changes and enhances mixed-conductivity for electrochemical applications, with Pr concentration influencing the charge-compensation mechanism.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/c7ta09570h</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 2050-7488 |
| ispartof | Journal of materials chemistry. A, Materials for energy and sustainability, 2018, Vol.6 (13), p.5324-5334 |
| issn | 2050-7488 2050-7496 |
| language | eng |
| recordid | cdi_proquest_journals_2018864881 |
| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Air temperature Carbon dioxide Conductors Contraction Dehydration Electrical conductivity Electrical resistivity Fuel technology High temperature Magnetic measurement Oxygen Powder Stability analysis Symmetry Temperature Temperature dependence Temperature effects Thermal evolution Thermogravimetric analysis Vacancies X-ray diffraction |
| title | Thermal evolution of structures and conductivity of Pr-substituted BaZr0.7Ce0.2Y0.1O3−δ: potential cathode components for protonic ceramic fuel cells |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-07T17%3A43%3A24IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_rsc_p&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Thermal%20evolution%20of%20structures%20and%20conductivity%20of%20Pr-substituted%20BaZr0.7Ce0.2Y0.1O3%E2%88%92%CE%B4:%20potential%20cathode%20components%20for%20protonic%20ceramic%20fuel%20cells&rft.jtitle=Journal%20of%20materials%20chemistry.%20A,%20Materials%20for%20energy%20and%20sustainability&rft.au=Heras-Juaristi,%20Gemma&rft.date=2018&rft.volume=6&rft.issue=13&rft.spage=5324&rft.epage=5334&rft.pages=5324-5334&rft.issn=2050-7488&rft.eissn=2050-7496&rft_id=info:doi/10.1039/c7ta09570h&rft_dat=%3Cproquest_rsc_p%3E2018864881%3C/proquest_rsc_p%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2018864881&rft_id=info:pmid/&rfr_iscdi=true |