Pt-CeO[sub 2] contact and its effect on CO hydrogenation selectivity
The CO[sub 2]/CH[sub 4] ratio during methanation on Pt was found to be very sensitive to the proximity of Pt and CeO[sub 2]. On 0.6 wt% Pt/Al[sub 2]O[sub 3], the CO[sub 2]/CH[sub 4] ratio was [approx]0.09 suggesting that most of the O from CO ends up as H[sub 2]O in the product stream. In contrast,...
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| Veröffentlicht in: | Journal of catalysis 1994-08, Vol.148:2 |
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| container_title | Journal of catalysis |
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| creator | Kalakkad, D.S. Datye, A.K. Robota, H.J. |
| description | The CO[sub 2]/CH[sub 4] ratio during methanation on Pt was found to be very sensitive to the proximity of Pt and CeO[sub 2]. On 0.6 wt% Pt/Al[sub 2]O[sub 3], the CO[sub 2]/CH[sub 4] ratio was [approx]0.09 suggesting that most of the O from CO ends up as H[sub 2]O in the product stream. In contrast, on 0.6 wt% Pt/CeO[sub 2] the CO[sub 2]/CH[sub 4] ratio ranged from 0.8-1.0. The selectivity to CO[sub 2] was not a result of the sequential water-gas shift reaction nor was it caused by a surface reduction of CeO[sub 2] by CO. The highest selectivity to CO[sub 2] is observed on catalysts with the smallest Pt particle sizes, providing further evidence that Pt-CeO[sub 2] contact influences the selectivity toward CO[sub 2] formation. In this study, the authors have also investigated whether the CO[sub 2]/CH[sub 4] ratio could be used as a probe of Pt-CeO[sub 2] contact in Pt/CeO[sub 2]-Al[sub 2]O[sub 3] catalysts. 15 refs., 8 figs., 3 tabs. |
| doi_str_mv | 10.1006/jcat.1994.1259 |
| format | Article |
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On 0.6 wt% Pt/Al[sub 2]O[sub 3], the CO[sub 2]/CH[sub 4] ratio was [approx]0.09 suggesting that most of the O from CO ends up as H[sub 2]O in the product stream. In contrast, on 0.6 wt% Pt/CeO[sub 2] the CO[sub 2]/CH[sub 4] ratio ranged from 0.8-1.0. The selectivity to CO[sub 2] was not a result of the sequential water-gas shift reaction nor was it caused by a surface reduction of CeO[sub 2] by CO. The highest selectivity to CO[sub 2] is observed on catalysts with the smallest Pt particle sizes, providing further evidence that Pt-CeO[sub 2] contact influences the selectivity toward CO[sub 2] formation. In this study, the authors have also investigated whether the CO[sub 2]/CH[sub 4] ratio could be used as a probe of Pt-CeO[sub 2] contact in Pt/CeO[sub 2]-Al[sub 2]O[sub 3] catalysts. 15 refs., 8 figs., 3 tabs.</description><identifier>ISSN: 0021-9517</identifier><identifier>EISSN: 1090-2694</identifier><identifier>DOI: 10.1006/jcat.1994.1259</identifier><language>eng</language><publisher>United States</publisher><subject>01 COAL, LIGNITE, AND PEAT ; 10 SYNTHETIC FUELS ; 100200 -- Synthetic Fuels-- Production-- (1990-) ; CARBON COMPOUNDS ; CARBON MONOXIDE ; CARBON OXIDES ; CATALYSIS ; CATALYST SUPPORTS ; CATALYTIC EFFECTS ; CERIUM COMPOUNDS ; CERIUM OXIDES ; CHALCOGENIDES ; CHEMICAL REACTIONS ; ELEMENTS ; HETEROGENEOUS CATALYSIS ; HYDROGENATION ; METALS ; OXIDES ; OXYGEN COMPOUNDS ; PLATINUM ; PLATINUM METALS ; RARE EARTH COMPOUNDS ; TRANSITION ELEMENTS 010408 -- Coal, Lignite, & Peat-- C1 Processes-- (1987-)</subject><ispartof>Journal of catalysis, 1994-08, Vol.148:2</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/6687578$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Kalakkad, D.S.</creatorcontrib><creatorcontrib>Datye, A.K.</creatorcontrib><creatorcontrib>Robota, H.J.</creatorcontrib><title>Pt-CeO[sub 2] contact and its effect on CO hydrogenation selectivity</title><title>Journal of catalysis</title><description>The CO[sub 2]/CH[sub 4] ratio during methanation on Pt was found to be very sensitive to the proximity of Pt and CeO[sub 2]. On 0.6 wt% Pt/Al[sub 2]O[sub 3], the CO[sub 2]/CH[sub 4] ratio was [approx]0.09 suggesting that most of the O from CO ends up as H[sub 2]O in the product stream. In contrast, on 0.6 wt% Pt/CeO[sub 2] the CO[sub 2]/CH[sub 4] ratio ranged from 0.8-1.0. The selectivity to CO[sub 2] was not a result of the sequential water-gas shift reaction nor was it caused by a surface reduction of CeO[sub 2] by CO. The highest selectivity to CO[sub 2] is observed on catalysts with the smallest Pt particle sizes, providing further evidence that Pt-CeO[sub 2] contact influences the selectivity toward CO[sub 2] formation. In this study, the authors have also investigated whether the CO[sub 2]/CH[sub 4] ratio could be used as a probe of Pt-CeO[sub 2] contact in Pt/CeO[sub 2]-Al[sub 2]O[sub 3] catalysts. 15 refs., 8 figs., 3 tabs.</description><subject>01 COAL, LIGNITE, AND PEAT</subject><subject>10 SYNTHETIC FUELS</subject><subject>100200 -- Synthetic Fuels-- Production-- (1990-)</subject><subject>CARBON COMPOUNDS</subject><subject>CARBON MONOXIDE</subject><subject>CARBON OXIDES</subject><subject>CATALYSIS</subject><subject>CATALYST SUPPORTS</subject><subject>CATALYTIC EFFECTS</subject><subject>CERIUM COMPOUNDS</subject><subject>CERIUM OXIDES</subject><subject>CHALCOGENIDES</subject><subject>CHEMICAL REACTIONS</subject><subject>ELEMENTS</subject><subject>HETEROGENEOUS CATALYSIS</subject><subject>HYDROGENATION</subject><subject>METALS</subject><subject>OXIDES</subject><subject>OXYGEN COMPOUNDS</subject><subject>PLATINUM</subject><subject>PLATINUM METALS</subject><subject>RARE EARTH COMPOUNDS</subject><subject>TRANSITION ELEMENTS 010408 -- Coal, Lignite, & Peat-- C1 Processes-- (1987-)</subject><issn>0021-9517</issn><issn>1090-2694</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1994</creationdate><recordtype>article</recordtype><recordid>eNqNjD8LwjAUxIMoWP-szsG99b3atM1cFbc6uImUmKYakRTMU_Dbm8EP4HTc_e6OsQVCggD56q4VJShllmAq5IBFCBLiNJfZkEUAKcZSYDFmE-_vAIhClBHbHCiuTH3yrwtPz1z3jpQmrlzLLXluus4E2zte1fz2aZ_91ThFNgTePAKyb0ufGRt16uHN_KdTttxtj9U-7j3ZxmtLRt_CtQuDJs_LQhTl-q_SF5RBQG8</recordid><startdate>19940801</startdate><enddate>19940801</enddate><creator>Kalakkad, D.S.</creator><creator>Datye, A.K.</creator><creator>Robota, H.J.</creator><scope>OTOTI</scope></search><sort><creationdate>19940801</creationdate><title>Pt-CeO[sub 2] contact and its effect on CO hydrogenation selectivity</title><author>Kalakkad, D.S. ; Datye, A.K. ; Robota, H.J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-osti_scitechconnect_66875783</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1994</creationdate><topic>01 COAL, LIGNITE, AND PEAT</topic><topic>10 SYNTHETIC FUELS</topic><topic>100200 -- Synthetic Fuels-- Production-- (1990-)</topic><topic>CARBON COMPOUNDS</topic><topic>CARBON MONOXIDE</topic><topic>CARBON OXIDES</topic><topic>CATALYSIS</topic><topic>CATALYST SUPPORTS</topic><topic>CATALYTIC EFFECTS</topic><topic>CERIUM COMPOUNDS</topic><topic>CERIUM OXIDES</topic><topic>CHALCOGENIDES</topic><topic>CHEMICAL REACTIONS</topic><topic>ELEMENTS</topic><topic>HETEROGENEOUS CATALYSIS</topic><topic>HYDROGENATION</topic><topic>METALS</topic><topic>OXIDES</topic><topic>OXYGEN COMPOUNDS</topic><topic>PLATINUM</topic><topic>PLATINUM METALS</topic><topic>RARE EARTH COMPOUNDS</topic><topic>TRANSITION ELEMENTS 010408 -- Coal, Lignite, & Peat-- C1 Processes-- (1987-)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kalakkad, D.S.</creatorcontrib><creatorcontrib>Datye, A.K.</creatorcontrib><creatorcontrib>Robota, H.J.</creatorcontrib><collection>OSTI.GOV</collection><jtitle>Journal of catalysis</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kalakkad, D.S.</au><au>Datye, A.K.</au><au>Robota, H.J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pt-CeO[sub 2] contact and its effect on CO hydrogenation selectivity</atitle><jtitle>Journal of catalysis</jtitle><date>1994-08-01</date><risdate>1994</risdate><volume>148:2</volume><issn>0021-9517</issn><eissn>1090-2694</eissn><abstract>The CO[sub 2]/CH[sub 4] ratio during methanation on Pt was found to be very sensitive to the proximity of Pt and CeO[sub 2]. On 0.6 wt% Pt/Al[sub 2]O[sub 3], the CO[sub 2]/CH[sub 4] ratio was [approx]0.09 suggesting that most of the O from CO ends up as H[sub 2]O in the product stream. In contrast, on 0.6 wt% Pt/CeO[sub 2] the CO[sub 2]/CH[sub 4] ratio ranged from 0.8-1.0. The selectivity to CO[sub 2] was not a result of the sequential water-gas shift reaction nor was it caused by a surface reduction of CeO[sub 2] by CO. The highest selectivity to CO[sub 2] is observed on catalysts with the smallest Pt particle sizes, providing further evidence that Pt-CeO[sub 2] contact influences the selectivity toward CO[sub 2] formation. In this study, the authors have also investigated whether the CO[sub 2]/CH[sub 4] ratio could be used as a probe of Pt-CeO[sub 2] contact in Pt/CeO[sub 2]-Al[sub 2]O[sub 3] catalysts. 15 refs., 8 figs., 3 tabs.</abstract><cop>United States</cop><doi>10.1006/jcat.1994.1259</doi></addata></record> |
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| identifier | ISSN: 0021-9517 |
| ispartof | Journal of catalysis, 1994-08, Vol.148:2 |
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| language | eng |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | 01 COAL, LIGNITE, AND PEAT 10 SYNTHETIC FUELS 100200 -- Synthetic Fuels-- Production-- (1990-) CARBON COMPOUNDS CARBON MONOXIDE CARBON OXIDES CATALYSIS CATALYST SUPPORTS CATALYTIC EFFECTS CERIUM COMPOUNDS CERIUM OXIDES CHALCOGENIDES CHEMICAL REACTIONS ELEMENTS HETEROGENEOUS CATALYSIS HYDROGENATION METALS OXIDES OXYGEN COMPOUNDS PLATINUM PLATINUM METALS RARE EARTH COMPOUNDS TRANSITION ELEMENTS 010408 -- Coal, Lignite, & Peat-- C1 Processes-- (1987-) |
| title | Pt-CeO[sub 2] contact and its effect on CO hydrogenation selectivity |
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