Atomically layer-by-layer diffusion of oxygen/hydrogen in highly epitaxial PrBaCo2O5.5+δ thin films
Single-crystalline epitaxial thin films of PrBaCo2O5.5+δ (PrBCO) were prepared, and their resistance R(t) under a switching flow of oxidizing and reducing gases were measured as a function of the gas flow time t in the temperature range of 200–800 °C. During the oxidation cycle under O2, the PrBCO f...
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| Veröffentlicht in: | Applied physics letters 2015-12, Vol.107 (24) |
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| container_title | Applied physics letters |
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| creator | Bao, Shanyong Xu, Xing Enriquez, Erik Mace, Brennan E. Chen, Garry Kelliher, Sean P. Chen, Chonglin Zhang, Yamei Whangbo, Myung-Hwan Dong, Chuang Zhang, Qinyu |
| description | Single-crystalline epitaxial thin films of PrBaCo2O5.5+δ (PrBCO) were prepared, and their resistance R(t) under a switching flow of oxidizing and reducing gases were measured as a function of the gas flow time t in the temperature range of 200–800 °C. During the oxidation cycle under O2, the PrBCO films exhibit fast oscillations in their dR(t)/dt vs. t plots, which reflect the oxidation processes, Co2+/Co3+ → Co3+ and Co3+ → Co3+/Co4+, that the Co atoms of PrBCO undergo. Each oscillation consists of two peaks, with larger and smaller peaks representing the oxygen/hydrogen diffusion through the (BaO)(CoO2)(PrO)(CoO2) layers of PrBCO via the oxygen-vacancy-exchange mechanism. This finding paves a significant avenue for cathode materials operating in low-temperature solid-oxide-fuel-cell devices and for chemical sensors with wide range of operating temperature. |
| doi_str_mv | 10.1063/1.4937926 |
| format | Article |
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During the oxidation cycle under O2, the PrBCO films exhibit fast oscillations in their dR(t)/dt vs. t plots, which reflect the oxidation processes, Co2+/Co3+ → Co3+ and Co3+ → Co3+/Co4+, that the Co atoms of PrBCO undergo. Each oscillation consists of two peaks, with larger and smaller peaks representing the oxygen/hydrogen diffusion through the (BaO)(CoO2)(PrO)(CoO2) layers of PrBCO via the oxygen-vacancy-exchange mechanism. This finding paves a significant avenue for cathode materials operating in low-temperature solid-oxide-fuel-cell devices and for chemical sensors with wide range of operating temperature.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.4937926</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>Applied physics ; Barium oxides ; Chemical sensors ; Cobalt ; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; Diffusion layers ; Direct reduction ; Electrode materials ; Gas flow ; Operating temperature ; Organic chemistry ; Oxidation ; Oxygen ; Single crystals ; Thin films</subject><ispartof>Applied physics letters, 2015-12, Vol.107 (24)</ispartof><rights>2015 AIP Publishing LLC.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-1f643e566f2a300de6981d068e6b3201e3e10db9eac12af60f97f2ff243920153</citedby><cites>FETCH-LOGICAL-c319t-1f643e566f2a300de6981d068e6b3201e3e10db9eac12af60f97f2ff243920153</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttps://www.osti.gov/servlets/purl/1468476$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Bao, Shanyong</creatorcontrib><creatorcontrib>Xu, Xing</creatorcontrib><creatorcontrib>Enriquez, Erik</creatorcontrib><creatorcontrib>Mace, Brennan E.</creatorcontrib><creatorcontrib>Chen, Garry</creatorcontrib><creatorcontrib>Kelliher, Sean P.</creatorcontrib><creatorcontrib>Chen, Chonglin</creatorcontrib><creatorcontrib>Zhang, Yamei</creatorcontrib><creatorcontrib>Whangbo, Myung-Hwan</creatorcontrib><creatorcontrib>Dong, Chuang</creatorcontrib><creatorcontrib>Zhang, Qinyu</creatorcontrib><creatorcontrib>Univ. of Texas, San Antonio, TX (United States)</creatorcontrib><title>Atomically layer-by-layer diffusion of oxygen/hydrogen in highly epitaxial PrBaCo2O5.5+δ thin films</title><title>Applied physics letters</title><description>Single-crystalline epitaxial thin films of PrBaCo2O5.5+δ (PrBCO) were prepared, and their resistance R(t) under a switching flow of oxidizing and reducing gases were measured as a function of the gas flow time t in the temperature range of 200–800 °C. During the oxidation cycle under O2, the PrBCO films exhibit fast oscillations in their dR(t)/dt vs. t plots, which reflect the oxidation processes, Co2+/Co3+ → Co3+ and Co3+ → Co3+/Co4+, that the Co atoms of PrBCO undergo. Each oscillation consists of two peaks, with larger and smaller peaks representing the oxygen/hydrogen diffusion through the (BaO)(CoO2)(PrO)(CoO2) layers of PrBCO via the oxygen-vacancy-exchange mechanism. This finding paves a significant avenue for cathode materials operating in low-temperature solid-oxide-fuel-cell devices and for chemical sensors with wide range of operating temperature.</description><subject>Applied physics</subject><subject>Barium oxides</subject><subject>Chemical sensors</subject><subject>Cobalt</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>Diffusion layers</subject><subject>Direct reduction</subject><subject>Electrode materials</subject><subject>Gas flow</subject><subject>Operating temperature</subject><subject>Organic chemistry</subject><subject>Oxidation</subject><subject>Oxygen</subject><subject>Single crystals</subject><subject>Thin films</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNotkE1OwzAQhS0EEqWw4AYWrBBK67ETJ16Wij-pUlnA2nITu3GVxsV2peZenIMzYSireaP53tPoIXQNZAKEsylMcsFKQfkJGgEpy4wBVKdoRAhhGRcFnKOLEDZpLShjI9TMotvaWnXdgDs1aJ-thuxP4MYasw_W9dgZ7A7DWvfTdmi8SwLbHrd23SaX3tmoDlZ1-M0_qLmjy2JS3H9_4dgmyNhuGy7RmVFd0Ff_c4w-nh7f5y_ZYvn8Op8tspqBiBkYnjNdcG6oYoQ0mosKGsIrzVeMEtBMA2lWQqsaqDKcGFEaagzNmUjngo3RzTHXhWhlqG3UdVu7vtd1lJDzKi95gm6P0M67z70OUW7c3vfpL0mBspKXBESi7o5U7V0IXhu583ar_CCByN-mJcj_ptkP61tvSg</recordid><startdate>20151214</startdate><enddate>20151214</enddate><creator>Bao, Shanyong</creator><creator>Xu, Xing</creator><creator>Enriquez, Erik</creator><creator>Mace, Brennan E.</creator><creator>Chen, Garry</creator><creator>Kelliher, Sean P.</creator><creator>Chen, Chonglin</creator><creator>Zhang, Yamei</creator><creator>Whangbo, Myung-Hwan</creator><creator>Dong, Chuang</creator><creator>Zhang, Qinyu</creator><general>American Institute of Physics</general><general>American Institute of Physics (AIP)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OIOZB</scope><scope>OTOTI</scope></search><sort><creationdate>20151214</creationdate><title>Atomically layer-by-layer diffusion of oxygen/hydrogen in highly epitaxial PrBaCo2O5.5+δ thin films</title><author>Bao, Shanyong ; Xu, Xing ; Enriquez, Erik ; Mace, Brennan E. ; Chen, Garry ; Kelliher, Sean P. ; Chen, Chonglin ; Zhang, Yamei ; Whangbo, Myung-Hwan ; Dong, Chuang ; Zhang, Qinyu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c319t-1f643e566f2a300de6981d068e6b3201e3e10db9eac12af60f97f2ff243920153</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Applied physics</topic><topic>Barium oxides</topic><topic>Chemical sensors</topic><topic>Cobalt</topic><topic>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</topic><topic>Diffusion layers</topic><topic>Direct reduction</topic><topic>Electrode materials</topic><topic>Gas flow</topic><topic>Operating temperature</topic><topic>Organic chemistry</topic><topic>Oxidation</topic><topic>Oxygen</topic><topic>Single crystals</topic><topic>Thin films</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bao, Shanyong</creatorcontrib><creatorcontrib>Xu, Xing</creatorcontrib><creatorcontrib>Enriquez, Erik</creatorcontrib><creatorcontrib>Mace, Brennan E.</creatorcontrib><creatorcontrib>Chen, Garry</creatorcontrib><creatorcontrib>Kelliher, Sean P.</creatorcontrib><creatorcontrib>Chen, Chonglin</creatorcontrib><creatorcontrib>Zhang, Yamei</creatorcontrib><creatorcontrib>Whangbo, Myung-Hwan</creatorcontrib><creatorcontrib>Dong, Chuang</creatorcontrib><creatorcontrib>Zhang, Qinyu</creatorcontrib><creatorcontrib>Univ. of Texas, San Antonio, TX (United States)</creatorcontrib><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bao, Shanyong</au><au>Xu, Xing</au><au>Enriquez, Erik</au><au>Mace, Brennan E.</au><au>Chen, Garry</au><au>Kelliher, Sean P.</au><au>Chen, Chonglin</au><au>Zhang, Yamei</au><au>Whangbo, Myung-Hwan</au><au>Dong, Chuang</au><au>Zhang, Qinyu</au><aucorp>Univ. of Texas, San Antonio, TX (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Atomically layer-by-layer diffusion of oxygen/hydrogen in highly epitaxial PrBaCo2O5.5+δ thin films</atitle><jtitle>Applied physics letters</jtitle><date>2015-12-14</date><risdate>2015</risdate><volume>107</volume><issue>24</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><abstract>Single-crystalline epitaxial thin films of PrBaCo2O5.5+δ (PrBCO) were prepared, and their resistance R(t) under a switching flow of oxidizing and reducing gases were measured as a function of the gas flow time t in the temperature range of 200–800 °C. 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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Applied physics Barium oxides Chemical sensors Cobalt CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Diffusion layers Direct reduction Electrode materials Gas flow Operating temperature Organic chemistry Oxidation Oxygen Single crystals Thin films |
| title | Atomically layer-by-layer diffusion of oxygen/hydrogen in highly epitaxial PrBaCo2O5.5+δ thin films |
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