Atomic-Scale Assembly of a Heterogeneous Catalytic Site

The distance between surface Pd atoms has been shown to control the catalytic formation of vinyl acetate from ethylene and acetic acid by AuPd catalysts. Here, we use the bulk alloy's thermodynamic properties, as well as the surface lattice spacing of a AuPd(100) alloy single-crystal model cata...

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Veröffentlicht in:	Journal of the American Chemical Society 2007-11, Vol.129 (46), p.14355-14361
Hauptverfasser:	Han, Patrick, Axnanda, Stephanus, Lyubinetsky, Igor, Goodman, D. Wayne
Format:	Artikel
Sprache:	eng
Schlagworte:	DISTRIBUTION Environmental Molecular Sciences Laboratory GOLD ALLOYS HETEROGENEOUS CATALYSIS Heterogeneous Catalytic MATERIALS SCIENCE MICROSTRUCTURE PALLADIUM PALLADIUM ALLOYS SCANNING TUNNELING MICROSCOPY STM SURFACE PROPERTIES THERMODYNAMIC PROPERTIES
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container_end_page	14361
container_issue	46
container_start_page	14355
container_title	Journal of the American Chemical Society
container_volume	129
creator	Han, Patrick Axnanda, Stephanus Lyubinetsky, Igor Goodman, D. Wayne
description	The distance between surface Pd atoms has been shown to control the catalytic formation of vinyl acetate from ethylene and acetic acid by AuPd catalysts. Here, we use the bulk alloy's thermodynamic properties, as well as the surface lattice spacing of a AuPd(100) alloy single-crystal model catalyst to control and optimize the concentration of the active site (Pd atom pairs at a specific Pd−Pd distance with Au nearest-neighbors). Scanning tunneling microscopy reveals that sample annealing has a direct effect on the surface Pd arrangements: short-range order preferentially forms Pd pairs located in the c(2 × 2) sites, which are known to be optimal for vinyl acetate synthesis. This effect could be harnessed for future industrial catalyst design.
doi_str_mv	10.1021/ja074891n
format	Article
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Soc</addtitle><date>2007-11-21</date><risdate>2007</risdate><volume>129</volume><issue>46</issue><spage>14355</spage><epage>14361</epage><pages>14355-14361</pages><issn>0002-7863</issn><eissn>1520-5126</eissn><abstract>The distance between surface Pd atoms has been shown to control the catalytic formation of vinyl acetate from ethylene and acetic acid by AuPd catalysts. Here, we use the bulk alloy's thermodynamic properties, as well as the surface lattice spacing of a AuPd(100) alloy single-crystal model catalyst to control and optimize the concentration of the active site (Pd atom pairs at a specific Pd−Pd distance with Au nearest-neighbors). Scanning tunneling microscopy reveals that sample annealing has a direct effect on the surface Pd arrangements: short-range order preferentially forms Pd pairs located in the c(2 × 2) sites, which are known to be optimal for vinyl acetate synthesis. This effect could be harnessed for future industrial catalyst design.</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>17967014</pmid><doi>10.1021/ja074891n</doi><tpages>7</tpages></addata></record>
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subjects	DISTRIBUTION Environmental Molecular Sciences Laboratory GOLD ALLOYS HETEROGENEOUS CATALYSIS Heterogeneous Catalytic MATERIALS SCIENCE MICROSTRUCTURE PALLADIUM PALLADIUM ALLOYS SCANNING TUNNELING MICROSCOPY STM SURFACE PROPERTIES THERMODYNAMIC PROPERTIES
title	Atomic-Scale Assembly of a Heterogeneous Catalytic Site
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