Site blocking effects in ethylidyne decomposition kinetics on Ru(001) : in-situ-study with infrared reflection absorption spectroscopy at elevated pressure
Utilizing in-situ FT-IRAS, we have investigated the decomposition kinetics of ethylidyne in the presence of coadsorbates on Ru(001). The results demonstrate that the stabilizing effect of coadsorbed CO and hydrogen is significantly enhanced at elevated pressure, supporting a model wherein an empty n...
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| Veröffentlicht in: | Journal of physical chemistry (1952) 1993-12, Vol.97 (49), p.12656-12659 |
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| container_end_page | 12659 |
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| container_issue | 49 |
| container_start_page | 12656 |
| container_title | Journal of physical chemistry (1952) |
| container_volume | 97 |
| creator | MIMS, C. A WEISEL, M. D HOFFMANN, F. M SINFELT, J. H WHITE, J. M |
| description | Utilizing in-situ FT-IRAS, we have investigated the decomposition kinetics of ethylidyne in the presence of coadsorbates on Ru(001). The results demonstrate that the stabilizing effect of coadsorbed CO and hydrogen is significantly enhanced at elevated pressure, supporting a model wherein an empty neighboring metal site is required before decomposition can proceed. We identify a weakly adsorbed CO species in 3-fold hollow sites in close proximity to the ethylidyne, whose coverage is controlled by the CO pressure at elevated temperatures. The results demonstrate the importance of weakly adsorbed species at high coverage in controlling surface reactions at elevated pressures and temperatures. 26 refs., 3 figs. |
| doi_str_mv | 10.1021/j100151a002 |
| format | Article |
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The results demonstrate the importance of weakly adsorbed species at high coverage in controlling surface reactions at elevated pressures and temperatures. 26 refs., 3 figs.</description><subject>10 SYNTHETIC FUELS</subject><subject>400102 -- Chemical & Spectral Procedures</subject><subject>400201 -- Chemical & Physicochemical Properties</subject><subject>ADSORPTION</subject><subject>CARBON COMPOUNDS</subject><subject>CARBON MONOXIDE</subject><subject>CARBON OXIDES</subject><subject>CATALYSTS</subject><subject>CHALCOGENIDES</subject><subject>CHEMICAL REACTIONS</subject><subject>Chemistry</subject><subject>DECOMPOSITION</subject><subject>ELEMENTS</subject><subject>Exact sciences and technology</subject><subject>FISCHER-TROPSCH SYNTHESIS</subject><subject>General and physical chemistry</subject><subject>HYDROCARBONS</subject><subject>HYDROGEN</subject><subject>INFRARED SPECTRA</subject><subject>INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY</subject><subject>KINETICS</subject><subject>METALS</subject><subject>NONMETALS</subject><subject>ORGANIC COMPOUNDS</subject><subject>OXIDES</subject><subject>OXYGEN COMPOUNDS</subject><subject>PLATINUM METALS</subject><subject>PRESSURE DEPENDENCE</subject><subject>REACTION KINETICS</subject><subject>RUTHENIUM</subject><subject>Solid-gas interface</subject><subject>SORPTION</subject><subject>SPECTRA</subject><subject>Surface physical chemistry</subject><subject>TRANSITION ELEMENTS 100200 -- Synthetic Fuels-- Production-- (1990-)</subject><issn>0022-3654</issn><issn>1541-5740</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNotkMlOxDAMhiMEEsPAiReIEAc4FLI0bcMNjdikkZBYzqMsLpOh01RJCuqz8LKExRdbvz__so3QMSUXlDB6uaGEUEEVIWwHzagoaSHqkuyiWVZYwStR7qODGDckc5zTGfp6dgmw7rx5d_0bhrYFkyJ2PYa0njpnpx6wBeO3g48uOd_jDEJyJuJcP41n2ekcX-WJIvfHIqbRTvjTpXWW2qACWByg7bLtz7DS0Yfht4xD1oKPxg8TVglDBx8qZXwIEOMY4BDttaqLcPSf5-j19uZlcV8sH-8eFtfLwjMiU0GN5dAYqoWuqaU6hzLQUhBlU5m6sjXTnCkjpLKSaCloA03T1KVmSmrO-Ryd_Pn6mNwqmvwRsza-7_N-q5qTUvIqQ6d_0KCiUV2-rDcurobgtipMK95IxmTFvwH1SXnj</recordid><startdate>19931209</startdate><enddate>19931209</enddate><creator>MIMS, C. 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A</creatorcontrib><creatorcontrib>WEISEL, M. D</creatorcontrib><creatorcontrib>HOFFMANN, F. M</creatorcontrib><creatorcontrib>SINFELT, J. H</creatorcontrib><creatorcontrib>WHITE, J. M</creatorcontrib><collection>Pascal-Francis</collection><collection>OSTI.GOV</collection><jtitle>Journal of physical chemistry (1952)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>MIMS, C. A</au><au>WEISEL, M. D</au><au>HOFFMANN, F. M</au><au>SINFELT, J. H</au><au>WHITE, J. M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Site blocking effects in ethylidyne decomposition kinetics on Ru(001) : in-situ-study with infrared reflection absorption spectroscopy at elevated pressure</atitle><jtitle>Journal of physical chemistry (1952)</jtitle><date>1993-12-09</date><risdate>1993</risdate><volume>97</volume><issue>49</issue><spage>12656</spage><epage>12659</epage><pages>12656-12659</pages><issn>0022-3654</issn><eissn>1541-5740</eissn><coden>JPCHAX</coden><abstract>Utilizing in-situ FT-IRAS, we have investigated the decomposition kinetics of ethylidyne in the presence of coadsorbates on Ru(001). The results demonstrate that the stabilizing effect of coadsorbed CO and hydrogen is significantly enhanced at elevated pressure, supporting a model wherein an empty neighboring metal site is required before decomposition can proceed. We identify a weakly adsorbed CO species in 3-fold hollow sites in close proximity to the ethylidyne, whose coverage is controlled by the CO pressure at elevated temperatures. The results demonstrate the importance of weakly adsorbed species at high coverage in controlling surface reactions at elevated pressures and temperatures. 26 refs., 3 figs.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/j100151a002</doi><tpages>4</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0022-3654 |
| ispartof | Journal of physical chemistry (1952), 1993-12, Vol.97 (49), p.12656-12659 |
| issn | 0022-3654 1541-5740 |
| language | eng |
| recordid | cdi_osti_scitechconnect_7304936 |
| source | American Chemical Society Journals |
| subjects | 10 SYNTHETIC FUELS 400102 -- Chemical & Spectral Procedures 400201 -- Chemical & Physicochemical Properties ADSORPTION CARBON COMPOUNDS CARBON MONOXIDE CARBON OXIDES CATALYSTS CHALCOGENIDES CHEMICAL REACTIONS Chemistry DECOMPOSITION ELEMENTS Exact sciences and technology FISCHER-TROPSCH SYNTHESIS General and physical chemistry HYDROCARBONS HYDROGEN INFRARED SPECTRA INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY KINETICS METALS NONMETALS ORGANIC COMPOUNDS OXIDES OXYGEN COMPOUNDS PLATINUM METALS PRESSURE DEPENDENCE REACTION KINETICS RUTHENIUM Solid-gas interface SORPTION SPECTRA Surface physical chemistry TRANSITION ELEMENTS 100200 -- Synthetic Fuels-- Production-- (1990-) |
| title | Site blocking effects in ethylidyne decomposition kinetics on Ru(001) : in-situ-study with infrared reflection absorption spectroscopy at elevated pressure |
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