CO/FTIR Spectroscopic Characterization of Pd/ZnO/Al2O3 Catalysts for Methanol Steam Reforming
An as-synthesized 8.8wt% Pd/ZnO/Al 2 O 3 catalyst was either pretreated under O 2 at 773 K followed by H 2 at 293 K or under H 2 at 773 K to obtain, respectively, a supported metallic Pd° catalyst (Pd°/ZnO/Al 2 O 3 ) or a supported PdZn alloy catalyst (PdZn/ZnO/Al 2 O 3 ). Both catalysts were studie...
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| Veröffentlicht in: | Catalysis letters 2008-05, Vol.122 (3-4), p.223-227 |
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| creator | Lebarbier, V. Dagle, R. Conant, T. Vohs, J. M. Datye, A. K. Wang, Y. |
| description | An as-synthesized 8.8wt% Pd/ZnO/Al
2
O
3
catalyst was either pretreated under O
2
at 773 K followed by H
2
at 293 K or under H
2
at 773 K to obtain, respectively, a supported metallic Pd° catalyst (Pd°/ZnO/Al
2
O
3
) or a supported PdZn alloy catalyst (PdZn/ZnO/Al
2
O
3
). Both catalysts were studied by CO adsorption using FTIR spectroscopy. For the supported PdZn alloy catalyst (PdZn/ZnO/Al
2
O
3
), exposure to a mixture of methanol and steam, simulating methanol steam reforming reaction conditions, does not change the catalyst surface composition. This implies that the active sites are PdZn alloy like structures. The exposure of the catalyst to an oxidizing environment (O
2
at 623 K) results in the break up of PdZn alloy, forming a readily reducible PdO with its metallic form being known as much less active and selective for methanol steam reforming. However, for the metallic Pd°/ZnO/Al
2
O
3
catalyst, FTIR results indicate that metallic Pd° can transform to PdZn alloy under methanol steam reforming conditions. These results suggest that PdZn alloy, even after an accidental exposure to oxygen, can self repair to form the active PdZn alloy phase under methanol steam reforming conditions. Catalytic behavior of the PdZn/ZnO/Al
2
O
3
catalyst also correlates well with the surface composition characterizations by FTIR/CO spectroscopy. |
| doi_str_mv | 10.1007/s10562-008-9407-7 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_osti_</sourceid><recordid>TN_cdi_osti_scitechconnect_934879</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2258942467</sourcerecordid><originalsourceid>FETCH-LOGICAL-c405t-798b4ad03b2ac67d56978e937cc159b55990a8af8a18ec53ecb99d1446cadc553</originalsourceid><addsrcrecordid>eNp1kE1LxDAQhoso-PkDvEXEY90kbZrmKMVVQVnxA0SQMDtN3Uo3WZN40F9vloqePGXIPPMy82TZIaOnjFI5CYyKiueU1rkqqczlRrbDhOR5LdXTZqopY3kh-dN2thvCG6VUSaZ2spdmNpk-XN2R-5XB6F1At-qRNAvwgNH4_gti7yxxHbltJ892Njkb-KwgDUQYPkMMpHOe3Ji4AOsGch8NLMmdSZ_L3r7uZ1sdDMEc_Lx72eP0_KG5zK9nF1fN2XWOJRUxl6qel9DSYs4BK9mKSsnaqEIiMqHmQihFoYauBlYbFIXBuVItK8sKoUUhir3saMx1IfY6YB8NLtBZm27SqiiThMQcj8zKu_cPE6J-cx_eprU056JWJS8rmSg2UphcBG86vfL9EvynZlSvTevRtE6m9dq0Xs-c_CRDQBg6Dxb78DvIaVEJKdYcH7mQWvbV-L8N_g__BmHijJA</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2258942467</pqid></control><display><type>article</type><title>CO/FTIR Spectroscopic Characterization of Pd/ZnO/Al2O3 Catalysts for Methanol Steam Reforming</title><source>SpringerLink Journals - AutoHoldings</source><creator>Lebarbier, V. ; Dagle, R. ; Conant, T. ; Vohs, J. M. ; Datye, A. K. ; Wang, Y.</creator><creatorcontrib>Lebarbier, V. ; Dagle, R. ; Conant, T. ; Vohs, J. M. ; Datye, A. K. ; Wang, Y. ; Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)</creatorcontrib><description>An as-synthesized 8.8wt% Pd/ZnO/Al
2
O
3
catalyst was either pretreated under O
2
at 773 K followed by H
2
at 293 K or under H
2
at 773 K to obtain, respectively, a supported metallic Pd° catalyst (Pd°/ZnO/Al
2
O
3
) or a supported PdZn alloy catalyst (PdZn/ZnO/Al
2
O
3
). Both catalysts were studied by CO adsorption using FTIR spectroscopy. For the supported PdZn alloy catalyst (PdZn/ZnO/Al
2
O
3
), exposure to a mixture of methanol and steam, simulating methanol steam reforming reaction conditions, does not change the catalyst surface composition. This implies that the active sites are PdZn alloy like structures. The exposure of the catalyst to an oxidizing environment (O
2
at 623 K) results in the break up of PdZn alloy, forming a readily reducible PdO with its metallic form being known as much less active and selective for methanol steam reforming. However, for the metallic Pd°/ZnO/Al
2
O
3
catalyst, FTIR results indicate that metallic Pd° can transform to PdZn alloy under methanol steam reforming conditions. These results suggest that PdZn alloy, even after an accidental exposure to oxygen, can self repair to form the active PdZn alloy phase under methanol steam reforming conditions. Catalytic behavior of the PdZn/ZnO/Al
2
O
3
catalyst also correlates well with the surface composition characterizations by FTIR/CO spectroscopy.</description><identifier>ISSN: 1011-372X</identifier><identifier>EISSN: 1572-879X</identifier><identifier>DOI: 10.1007/s10562-008-9407-7</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>10 SYNTHETIC FUELS ; ADSORPTION ; ALLOYS ; Aluminum oxide ; Catalysis ; CATALYSTS ; Chemistry ; Chemistry and Materials Science ; Composition ; Crystals ; Environmental Molecular Sciences Laboratory ; Exact sciences and technology ; Exposure ; Fourier transforms ; FTIR spectroscopy ; General and physical chemistry ; Industrial Chemistry/Chemical Engineering ; Infrared spectroscopy ; METHANOL ; methanol steam reforming ; MIXTURES ; Organometallic Chemistry ; Oxidation ; OXYGEN ; Pd catalyst ; PdZn alloy catalyst ; Physical Chemistry ; Reforming ; REPAIR ; SPECTROSCOPY ; Spectrum analysis ; STEAM ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry ; Zinc oxide</subject><ispartof>Catalysis letters, 2008-05, Vol.122 (3-4), p.223-227</ispartof><rights>Springer Science+Business Media, LLC 2008</rights><rights>2008 INIST-CNRS</rights><rights>Catalysis Letters is a copyright of Springer, (2008). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c405t-798b4ad03b2ac67d56978e937cc159b55990a8af8a18ec53ecb99d1446cadc553</citedby><cites>FETCH-LOGICAL-c405t-798b4ad03b2ac67d56978e937cc159b55990a8af8a18ec53ecb99d1446cadc553</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10562-008-9407-7$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10562-008-9407-7$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>230,314,780,784,885,27923,27924,41487,42556,51318</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20365757$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/934879$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Lebarbier, V.</creatorcontrib><creatorcontrib>Dagle, R.</creatorcontrib><creatorcontrib>Conant, T.</creatorcontrib><creatorcontrib>Vohs, J. M.</creatorcontrib><creatorcontrib>Datye, A. K.</creatorcontrib><creatorcontrib>Wang, Y.</creatorcontrib><creatorcontrib>Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)</creatorcontrib><title>CO/FTIR Spectroscopic Characterization of Pd/ZnO/Al2O3 Catalysts for Methanol Steam Reforming</title><title>Catalysis letters</title><addtitle>Catal Lett</addtitle><description>An as-synthesized 8.8wt% Pd/ZnO/Al
2
O
3
catalyst was either pretreated under O
2
at 773 K followed by H
2
at 293 K or under H
2
at 773 K to obtain, respectively, a supported metallic Pd° catalyst (Pd°/ZnO/Al
2
O
3
) or a supported PdZn alloy catalyst (PdZn/ZnO/Al
2
O
3
). Both catalysts were studied by CO adsorption using FTIR spectroscopy. For the supported PdZn alloy catalyst (PdZn/ZnO/Al
2
O
3
), exposure to a mixture of methanol and steam, simulating methanol steam reforming reaction conditions, does not change the catalyst surface composition. This implies that the active sites are PdZn alloy like structures. The exposure of the catalyst to an oxidizing environment (O
2
at 623 K) results in the break up of PdZn alloy, forming a readily reducible PdO with its metallic form being known as much less active and selective for methanol steam reforming. However, for the metallic Pd°/ZnO/Al
2
O
3
catalyst, FTIR results indicate that metallic Pd° can transform to PdZn alloy under methanol steam reforming conditions. These results suggest that PdZn alloy, even after an accidental exposure to oxygen, can self repair to form the active PdZn alloy phase under methanol steam reforming conditions. Catalytic behavior of the PdZn/ZnO/Al
2
O
3
catalyst also correlates well with the surface composition characterizations by FTIR/CO spectroscopy.</description><subject>10 SYNTHETIC FUELS</subject><subject>ADSORPTION</subject><subject>ALLOYS</subject><subject>Aluminum oxide</subject><subject>Catalysis</subject><subject>CATALYSTS</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Composition</subject><subject>Crystals</subject><subject>Environmental Molecular Sciences Laboratory</subject><subject>Exact sciences and technology</subject><subject>Exposure</subject><subject>Fourier transforms</subject><subject>FTIR spectroscopy</subject><subject>General and physical chemistry</subject><subject>Industrial Chemistry/Chemical Engineering</subject><subject>Infrared spectroscopy</subject><subject>METHANOL</subject><subject>methanol steam reforming</subject><subject>MIXTURES</subject><subject>Organometallic Chemistry</subject><subject>Oxidation</subject><subject>OXYGEN</subject><subject>Pd catalyst</subject><subject>PdZn alloy catalyst</subject><subject>Physical Chemistry</subject><subject>Reforming</subject><subject>REPAIR</subject><subject>SPECTROSCOPY</subject><subject>Spectrum analysis</subject><subject>STEAM</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><subject>Zinc oxide</subject><issn>1011-372X</issn><issn>1572-879X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp1kE1LxDAQhoso-PkDvEXEY90kbZrmKMVVQVnxA0SQMDtN3Uo3WZN40F9vloqePGXIPPMy82TZIaOnjFI5CYyKiueU1rkqqczlRrbDhOR5LdXTZqopY3kh-dN2thvCG6VUSaZ2spdmNpk-XN2R-5XB6F1At-qRNAvwgNH4_gti7yxxHbltJ892Njkb-KwgDUQYPkMMpHOe3Ji4AOsGch8NLMmdSZ_L3r7uZ1sdDMEc_Lx72eP0_KG5zK9nF1fN2XWOJRUxl6qel9DSYs4BK9mKSsnaqEIiMqHmQihFoYauBlYbFIXBuVItK8sKoUUhir3saMx1IfY6YB8NLtBZm27SqiiThMQcj8zKu_cPE6J-cx_eprU056JWJS8rmSg2UphcBG86vfL9EvynZlSvTevRtE6m9dq0Xs-c_CRDQBg6Dxb78DvIaVEJKdYcH7mQWvbV-L8N_g__BmHijJA</recordid><startdate>20080501</startdate><enddate>20080501</enddate><creator>Lebarbier, V.</creator><creator>Dagle, R.</creator><creator>Conant, T.</creator><creator>Vohs, J. M.</creator><creator>Datye, A. K.</creator><creator>Wang, Y.</creator><general>Springer US</general><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>OTOTI</scope></search><sort><creationdate>20080501</creationdate><title>CO/FTIR Spectroscopic Characterization of Pd/ZnO/Al2O3 Catalysts for Methanol Steam Reforming</title><author>Lebarbier, V. ; Dagle, R. ; Conant, T. ; Vohs, J. M. ; Datye, A. K. ; Wang, Y.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c405t-798b4ad03b2ac67d56978e937cc159b55990a8af8a18ec53ecb99d1446cadc553</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>10 SYNTHETIC FUELS</topic><topic>ADSORPTION</topic><topic>ALLOYS</topic><topic>Aluminum oxide</topic><topic>Catalysis</topic><topic>CATALYSTS</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Composition</topic><topic>Crystals</topic><topic>Environmental Molecular Sciences Laboratory</topic><topic>Exact sciences and technology</topic><topic>Exposure</topic><topic>Fourier transforms</topic><topic>FTIR spectroscopy</topic><topic>General and physical chemistry</topic><topic>Industrial Chemistry/Chemical Engineering</topic><topic>Infrared spectroscopy</topic><topic>METHANOL</topic><topic>methanol steam reforming</topic><topic>MIXTURES</topic><topic>Organometallic Chemistry</topic><topic>Oxidation</topic><topic>OXYGEN</topic><topic>Pd catalyst</topic><topic>PdZn alloy catalyst</topic><topic>Physical Chemistry</topic><topic>Reforming</topic><topic>REPAIR</topic><topic>SPECTROSCOPY</topic><topic>Spectrum analysis</topic><topic>STEAM</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><topic>Zinc oxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lebarbier, V.</creatorcontrib><creatorcontrib>Dagle, R.</creatorcontrib><creatorcontrib>Conant, T.</creatorcontrib><creatorcontrib>Vohs, J. M.</creatorcontrib><creatorcontrib>Datye, A. K.</creatorcontrib><creatorcontrib>Wang, Y.</creatorcontrib><creatorcontrib>Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Science Database</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>OSTI.GOV</collection><jtitle>Catalysis letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lebarbier, V.</au><au>Dagle, R.</au><au>Conant, T.</au><au>Vohs, J. M.</au><au>Datye, A. K.</au><au>Wang, Y.</au><aucorp>Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>CO/FTIR Spectroscopic Characterization of Pd/ZnO/Al2O3 Catalysts for Methanol Steam Reforming</atitle><jtitle>Catalysis letters</jtitle><stitle>Catal Lett</stitle><date>2008-05-01</date><risdate>2008</risdate><volume>122</volume><issue>3-4</issue><spage>223</spage><epage>227</epage><pages>223-227</pages><issn>1011-372X</issn><eissn>1572-879X</eissn><abstract>An as-synthesized 8.8wt% Pd/ZnO/Al
2
O
3
catalyst was either pretreated under O
2
at 773 K followed by H
2
at 293 K or under H
2
at 773 K to obtain, respectively, a supported metallic Pd° catalyst (Pd°/ZnO/Al
2
O
3
) or a supported PdZn alloy catalyst (PdZn/ZnO/Al
2
O
3
). Both catalysts were studied by CO adsorption using FTIR spectroscopy. For the supported PdZn alloy catalyst (PdZn/ZnO/Al
2
O
3
), exposure to a mixture of methanol and steam, simulating methanol steam reforming reaction conditions, does not change the catalyst surface composition. This implies that the active sites are PdZn alloy like structures. The exposure of the catalyst to an oxidizing environment (O
2
at 623 K) results in the break up of PdZn alloy, forming a readily reducible PdO with its metallic form being known as much less active and selective for methanol steam reforming. However, for the metallic Pd°/ZnO/Al
2
O
3
catalyst, FTIR results indicate that metallic Pd° can transform to PdZn alloy under methanol steam reforming conditions. These results suggest that PdZn alloy, even after an accidental exposure to oxygen, can self repair to form the active PdZn alloy phase under methanol steam reforming conditions. Catalytic behavior of the PdZn/ZnO/Al
2
O
3
catalyst also correlates well with the surface composition characterizations by FTIR/CO spectroscopy.</abstract><cop>Boston</cop><pub>Springer US</pub><doi>10.1007/s10562-008-9407-7</doi><tpages>5</tpages></addata></record> |
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| ispartof | Catalysis letters, 2008-05, Vol.122 (3-4), p.223-227 |
| issn | 1011-372X 1572-879X |
| language | eng |
| recordid | cdi_osti_scitechconnect_934879 |
| source | SpringerLink Journals - AutoHoldings |
| subjects | 10 SYNTHETIC FUELS ADSORPTION ALLOYS Aluminum oxide Catalysis CATALYSTS Chemistry Chemistry and Materials Science Composition Crystals Environmental Molecular Sciences Laboratory Exact sciences and technology Exposure Fourier transforms FTIR spectroscopy General and physical chemistry Industrial Chemistry/Chemical Engineering Infrared spectroscopy METHANOL methanol steam reforming MIXTURES Organometallic Chemistry Oxidation OXYGEN Pd catalyst PdZn alloy catalyst Physical Chemistry Reforming REPAIR SPECTROSCOPY Spectrum analysis STEAM Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry Zinc oxide |
| title | CO/FTIR Spectroscopic Characterization of Pd/ZnO/Al2O3 Catalysts for Methanol Steam Reforming |
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