Vacancy assisted SrO formation on La0.8Sr0.2Co0.2Fe0.8O3−δ surfaces—A synchrotron photoemission study
We present a systematic synchrotron radiation photoemission spectroscopy study of the interaction of O2 with defective La0.8Sr0.2Co0.2Fe0.8O3−δ(100) surfaces at low temperatures. First, the surface chemical evolution during low energy Ar+ ion sputtering is investigated and is found to create oxygen...
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| Veröffentlicht in: | Surface science 2015-12, Vol.642, p.33-38 |
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| container_title | Surface science |
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| creator | Kuyyalil, J. Newby, D. Laverock, J. Yu, Y. Cetin, D. Basu, S.N. Ludwig, K. Smith, K.E. |
| description | We present a systematic synchrotron radiation photoemission spectroscopy study of the interaction of O2 with defective La0.8Sr0.2Co0.2Fe0.8O3−δ(100) surfaces at low temperatures. First, the surface chemical evolution during low energy Ar+ ion sputtering is investigated and is found to create oxygen vacancies. Subsequently, the interaction of the O2 molecules with La0.8Sr0.2Co0.2Fe0.8O3−δ(100) surface is observed to create an insulating phase. We performed a detailed core-level peak-fitting analysis to identify the chemical nature of this phase and to probe the role of vacancies in the formation of this phase.
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•The interaction of oxygen molecules with defective La0.8Sr0.2Fe0.2Co0.8O3−δ (LSCF) is studied.•Oxygen vacancy creation in LSCF using low energy Ar+ ion sputtering•Formation of insulating SrO phase on LSCF surface at 150°C•Dependence of SrO formation on oxygen vacancy concentration |
| doi_str_mv | 10.1016/j.susc.2015.08.001 |
| format | Article |
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[Display omitted]
•The interaction of oxygen molecules with defective La0.8Sr0.2Fe0.2Co0.8O3−δ (LSCF) is studied.•Oxygen vacancy creation in LSCF using low energy Ar+ ion sputtering•Formation of insulating SrO phase on LSCF surface at 150°C•Dependence of SrO formation on oxygen vacancy concentration</description><identifier>ISSN: 0039-6028</identifier><identifier>EISSN: 1879-2758</identifier><identifier>DOI: 10.1016/j.susc.2015.08.001</identifier><language>eng</language><publisher>United States: Elsevier B.V</publisher><subject>Fuel cell cathode ; Lanthanum strontium cobalt ferrite ; Oxygen vacancy ; SOFC ; Thin film ; XPS</subject><ispartof>Surface science, 2015-12, Vol.642, p.33-38</ispartof><rights>2015 Elsevier B.V.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c371t-7115d496b76f3a6b57333cb7309013455ca9ef297d566513351eb07a0adb979f3</citedby><cites>FETCH-LOGICAL-c371t-7115d496b76f3a6b57333cb7309013455ca9ef297d566513351eb07a0adb979f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0039602815002204$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/1229504$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Kuyyalil, J.</creatorcontrib><creatorcontrib>Newby, D.</creatorcontrib><creatorcontrib>Laverock, J.</creatorcontrib><creatorcontrib>Yu, Y.</creatorcontrib><creatorcontrib>Cetin, D.</creatorcontrib><creatorcontrib>Basu, S.N.</creatorcontrib><creatorcontrib>Ludwig, K.</creatorcontrib><creatorcontrib>Smith, K.E.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL), Upton, NY (United States)</creatorcontrib><title>Vacancy assisted SrO formation on La0.8Sr0.2Co0.2Fe0.8O3−δ surfaces—A synchrotron photoemission study</title><title>Surface science</title><description>We present a systematic synchrotron radiation photoemission spectroscopy study of the interaction of O2 with defective La0.8Sr0.2Co0.2Fe0.8O3−δ(100) surfaces at low temperatures. First, the surface chemical evolution during low energy Ar+ ion sputtering is investigated and is found to create oxygen vacancies. Subsequently, the interaction of the O2 molecules with La0.8Sr0.2Co0.2Fe0.8O3−δ(100) surface is observed to create an insulating phase. We performed a detailed core-level peak-fitting analysis to identify the chemical nature of this phase and to probe the role of vacancies in the formation of this phase.
[Display omitted]
•The interaction of oxygen molecules with defective La0.8Sr0.2Fe0.2Co0.8O3−δ (LSCF) is studied.•Oxygen vacancy creation in LSCF using low energy Ar+ ion sputtering•Formation of insulating SrO phase on LSCF surface at 150°C•Dependence of SrO formation on oxygen vacancy concentration</description><subject>Fuel cell cathode</subject><subject>Lanthanum strontium cobalt ferrite</subject><subject>Oxygen vacancy</subject><subject>SOFC</subject><subject>Thin film</subject><subject>XPS</subject><issn>0039-6028</issn><issn>1879-2758</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp9kM9KxDAQxoMouK6-gKfivXXSNE0DXpbFf7Cwh1WvIU1TNsVtliQr9ObRs_goPocPsU9iynp2GGb4YH4fw4fQJYYMAy6vu8zvvMpywDSDKgPAR2iCK8bTnNHqGE0ACE9LyKtTdOZ9B7EKTieoe5FK9mpIpPfGB90kK7dMWus2MhjbJ7EXErJq5SDL5zaOOx3lkuw_Pn--E79zrVTa79-_ZokferV2NrgIbdc2WL0x0TUqH3bNcI5OWvnq9cXfnqLnu9un-UO6WN4_zmeLVBGGQ8owpk3By5qVLZFlTRkhRNWMAAdMCkqV5LrNOWtoWVJMCMW6BiZBNjVnvCVTdHXwtT4Y4ZUJWq2V7XutgsB5zikU8Sg_HClnvXe6FVtnNtINAoMYIxWdGCMVY6QCKhEjjdDNAdLx_Tej3eiue6Ub40bzxpr_8F8U84DP</recordid><startdate>20151201</startdate><enddate>20151201</enddate><creator>Kuyyalil, J.</creator><creator>Newby, D.</creator><creator>Laverock, J.</creator><creator>Yu, Y.</creator><creator>Cetin, D.</creator><creator>Basu, S.N.</creator><creator>Ludwig, K.</creator><creator>Smith, K.E.</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>20151201</creationdate><title>Vacancy assisted SrO formation on La0.8Sr0.2Co0.2Fe0.8O3−δ surfaces—A synchrotron photoemission study</title><author>Kuyyalil, J. ; Newby, D. ; Laverock, J. ; Yu, Y. ; Cetin, D. ; Basu, S.N. ; Ludwig, K. ; Smith, K.E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c371t-7115d496b76f3a6b57333cb7309013455ca9ef297d566513351eb07a0adb979f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Fuel cell cathode</topic><topic>Lanthanum strontium cobalt ferrite</topic><topic>Oxygen vacancy</topic><topic>SOFC</topic><topic>Thin film</topic><topic>XPS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kuyyalil, J.</creatorcontrib><creatorcontrib>Newby, D.</creatorcontrib><creatorcontrib>Laverock, J.</creatorcontrib><creatorcontrib>Yu, Y.</creatorcontrib><creatorcontrib>Cetin, D.</creatorcontrib><creatorcontrib>Basu, S.N.</creatorcontrib><creatorcontrib>Ludwig, K.</creatorcontrib><creatorcontrib>Smith, K.E.</creatorcontrib><creatorcontrib>Brookhaven National Laboratory (BNL), Upton, NY (United States)</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Surface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kuyyalil, J.</au><au>Newby, D.</au><au>Laverock, J.</au><au>Yu, Y.</au><au>Cetin, D.</au><au>Basu, S.N.</au><au>Ludwig, K.</au><au>Smith, K.E.</au><aucorp>Brookhaven National Laboratory (BNL), Upton, NY (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Vacancy assisted SrO formation on La0.8Sr0.2Co0.2Fe0.8O3−δ surfaces—A synchrotron photoemission study</atitle><jtitle>Surface science</jtitle><date>2015-12-01</date><risdate>2015</risdate><volume>642</volume><spage>33</spage><epage>38</epage><pages>33-38</pages><issn>0039-6028</issn><eissn>1879-2758</eissn><abstract>We present a systematic synchrotron radiation photoemission spectroscopy study of the interaction of O2 with defective La0.8Sr0.2Co0.2Fe0.8O3−δ(100) surfaces at low temperatures. First, the surface chemical evolution during low energy Ar+ ion sputtering is investigated and is found to create oxygen vacancies. Subsequently, the interaction of the O2 molecules with La0.8Sr0.2Co0.2Fe0.8O3−δ(100) surface is observed to create an insulating phase. We performed a detailed core-level peak-fitting analysis to identify the chemical nature of this phase and to probe the role of vacancies in the formation of this phase.
[Display omitted]
•The interaction of oxygen molecules with defective La0.8Sr0.2Fe0.2Co0.8O3−δ (LSCF) is studied.•Oxygen vacancy creation in LSCF using low energy Ar+ ion sputtering•Formation of insulating SrO phase on LSCF surface at 150°C•Dependence of SrO formation on oxygen vacancy concentration</abstract><cop>United States</cop><pub>Elsevier B.V</pub><doi>10.1016/j.susc.2015.08.001</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Surface science, 2015-12, Vol.642, p.33-38 |
| issn | 0039-6028 1879-2758 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1229504 |
| source | Elsevier ScienceDirect Journals |
| subjects | Fuel cell cathode Lanthanum strontium cobalt ferrite Oxygen vacancy SOFC Thin film XPS |
| title | Vacancy assisted SrO formation on La0.8Sr0.2Co0.2Fe0.8O3−δ surfaces—A synchrotron photoemission study |
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