Influence of the strong metal-support interaction on the CO chemisorption at a Pt/SiO2 catalyst
Pt/SiO2 catalysts prepared by sol-gel processing were studied by transmission electron microscopy, electron diffraction, high-resolution electron microscopy and Fourier-transform infrared spectroscopy. The samples exhibit uniform dispersion of the metal phase with narrow particle size distribution....
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| Veröffentlicht in: | Catalysis letters 1997-01, Vol.43 (3-4), p.195-199 |
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| creator | Hippe, C Lamber, R Schulz-Ekloff, G Schubert, U |
| description | Pt/SiO2 catalysts prepared by sol-gel processing were studied by transmission electron microscopy, electron diffraction, high-resolution electron microscopy and Fourier-transform infrared spectroscopy. The samples exhibit uniform dispersion of the metal phase with narrow particle size distribution. Treatment with hydrogen in the temperature range 773-923 K yields Pt/Si alloys at lower temperatures and platinum silicides (Pt3Si and Pt12Si5) at higher temperatures. The CO chemisorption shows that with increasing degree of alloying (1) the ν (CO)l and the ν (CO)b band shifts to lower wavenumbers, (2) the intensity of the ν (CO)l band decreases and (3) the ν (CO)b/ν(CO)l intensity ratio increases. The phenomena are interpreted by simultaneous effects of Pt surface dilution, enhanced electron back-donation from platinum to CO and Pt d-band narrowing. |
| doi_str_mv | 10.1023/A:1018919412751 |
| format | Article |
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The samples exhibit uniform dispersion of the metal phase with narrow particle size distribution. Treatment with hydrogen in the temperature range 773-923 K yields Pt/Si alloys at lower temperatures and platinum silicides (Pt3Si and Pt12Si5) at higher temperatures. The CO chemisorption shows that with increasing degree of alloying (1) the ν (CO)l and the ν (CO)b band shifts to lower wavenumbers, (2) the intensity of the ν (CO)l band decreases and (3) the ν (CO)b/ν(CO)l intensity ratio increases. The phenomena are interpreted by simultaneous effects of Pt surface dilution, enhanced electron back-donation from platinum to CO and Pt d-band narrowing.</description><identifier>ISSN: 1011-372X</identifier><identifier>EISSN: 1572-879X</identifier><identifier>DOI: 10.1023/A:1018919412751</identifier><language>eng</language><publisher>Dordrecht: Springer Nature B.V</publisher><subject>Catalysis ; Catalysts ; Chemisorption ; Dilution ; Electron diffraction ; Fourier transforms ; High resolution electron microscopy ; Microscopy ; Organic chemistry ; Particle size distribution ; Platinum ; Silicides ; Silicon base alloys ; Silicon dioxide ; Sol-gel processes ; Transmission electron microscopy</subject><ispartof>Catalysis letters, 1997-01, Vol.43 (3-4), p.195-199</ispartof><rights>Catalysis Letters is a copyright of Springer, (1997). 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Treatment with hydrogen in the temperature range 773-923 K yields Pt/Si alloys at lower temperatures and platinum silicides (Pt3Si and Pt12Si5) at higher temperatures. The CO chemisorption shows that with increasing degree of alloying (1) the ν (CO)l and the ν (CO)b band shifts to lower wavenumbers, (2) the intensity of the ν (CO)l band decreases and (3) the ν (CO)b/ν(CO)l intensity ratio increases. The phenomena are interpreted by simultaneous effects of Pt surface dilution, enhanced electron back-donation from platinum to CO and Pt d-band narrowing.</description><subject>Catalysis</subject><subject>Catalysts</subject><subject>Chemisorption</subject><subject>Dilution</subject><subject>Electron diffraction</subject><subject>Fourier transforms</subject><subject>High resolution electron microscopy</subject><subject>Microscopy</subject><subject>Organic chemistry</subject><subject>Particle size distribution</subject><subject>Platinum</subject><subject>Silicides</subject><subject>Silicon base alloys</subject><subject>Silicon dioxide</subject><subject>Sol-gel processes</subject><subject>Transmission electron microscopy</subject><issn>1011-372X</issn><issn>1572-879X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNotTVtLwzAYDaLgnD77GvC57vtyWRLfxtA5GFRQYW8lbRPX0TW1SR_899YLHDiHw7kQcotwj8D4YvWAgNqgEciUxDMyQ6lYppXZn08aEDOu2P6SXMV4BACj0MxIse18O7qucjR4mg6OxjSE7oOeXLJtFse-D0OiTZfcYKvUhI5O-Mmtc1od3KmJYeh_fZuopS9p8drkjFZ2qn_FdE0uvG2ju_nnOXl_enxbP2e7fLNdr3ZZjxpTVlknQKhaGlFrzZRWIJdcWOWlt8JLAYaB56XnXnC5rC3jvnRY1lxzIYHzObn72-2H8Dm6mIpjGIduuiwYkwYYSMH4N_KrVaA</recordid><startdate>19970101</startdate><enddate>19970101</enddate><creator>Hippe, C</creator><creator>Lamber, R</creator><creator>Schulz-Ekloff, G</creator><creator>Schubert, U</creator><general>Springer Nature B.V</general><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></search><sort><creationdate>19970101</creationdate><title>Influence of the strong metal-support interaction on the CO chemisorption at a Pt/SiO2 catalyst</title><author>Hippe, C ; Lamber, R ; Schulz-Ekloff, G ; Schubert, U</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p181t-cae4047d594d88278705634a7f5fa4f540920f3bf3f4356da23fbe1bd38345033</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Catalysis</topic><topic>Catalysts</topic><topic>Chemisorption</topic><topic>Dilution</topic><topic>Electron diffraction</topic><topic>Fourier transforms</topic><topic>High resolution electron microscopy</topic><topic>Microscopy</topic><topic>Organic chemistry</topic><topic>Particle size distribution</topic><topic>Platinum</topic><topic>Silicides</topic><topic>Silicon base alloys</topic><topic>Silicon dioxide</topic><topic>Sol-gel processes</topic><topic>Transmission electron microscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hippe, C</creatorcontrib><creatorcontrib>Lamber, R</creatorcontrib><creatorcontrib>Schulz-Ekloff, G</creatorcontrib><creatorcontrib>Schubert, U</creatorcontrib><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><jtitle>Catalysis letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hippe, C</au><au>Lamber, R</au><au>Schulz-Ekloff, G</au><au>Schubert, U</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Influence of the strong metal-support interaction on the CO chemisorption at a Pt/SiO2 catalyst</atitle><jtitle>Catalysis letters</jtitle><date>1997-01-01</date><risdate>1997</risdate><volume>43</volume><issue>3-4</issue><spage>195</spage><epage>199</epage><pages>195-199</pages><issn>1011-372X</issn><eissn>1572-879X</eissn><abstract>Pt/SiO2 catalysts prepared by sol-gel processing were studied by transmission electron microscopy, electron diffraction, high-resolution electron microscopy and Fourier-transform infrared spectroscopy. 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| ispartof | Catalysis letters, 1997-01, Vol.43 (3-4), p.195-199 |
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| language | eng |
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| subjects | Catalysis Catalysts Chemisorption Dilution Electron diffraction Fourier transforms High resolution electron microscopy Microscopy Organic chemistry Particle size distribution Platinum Silicides Silicon base alloys Silicon dioxide Sol-gel processes Transmission electron microscopy |
| title | Influence of the strong metal-support interaction on the CO chemisorption at a Pt/SiO2 catalyst |
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