CO chemisorption on Au(110) investigated under elevated pressures by polarized reflection absorption infrared spectroscopy and scanning tunneling microscopy

Jugnet, Y.; Aires, F.J. Cadete Santos; Deranlot, C.; Piccolo, L.; Bertolini, J.C.

doi:10.1016/s0039-6028(02)02295-1

Cited by 111 publications

(133 citation statements)

References 24 publications

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“…Jugnet et al observed similar behavior for Au(110) for CO pressures above 0.1 mbar (92). STM results showed significant surface roughening and a lifting of terrace anisotropy.…”

Section: 2mentioning

confidence: 63%

Surface chemistry of catalysis by gold

et al. 2004

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IntroductionGold has long been regarded as an "inert" surface and bulk gold surfaces do not chemisorb many molecules easily. However, in the last decade, largely through the efforts of Masatake Haruta, gold particles, particularly those below 5 nm in size, have begun to garner attention for unique catalytic properties (1-8). In recent years, supported gold particles have been shown to be effective as catalysts for low temperature CO oxidation (9), selective oxidation of propene to propene oxide (10), water gas shift (11), NO reduction (12), selective hydrogenation of acetylene (or butadiene) (13)

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“…Jugnet et al observed similar behavior for Au(110) for CO pressures above 0.1 mbar (92). STM results showed significant surface roughening and a lifting of terrace anisotropy.…”

Section: 2mentioning

confidence: 63%

Surface chemistry of catalysis by gold

et al. 2004

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“…A Au(111) surface saturated with flat-lying PDI species was then dosed with carbon monoxide at a sample temperature of 93 K. Except when the surface is roughened by ion bombardment, or on a stepped surface (to artificially create low-coordination sites), carbon monoxide desorbs from gold well below liquid nitrogen temperature [14][15][16][17][18][19][20]. However, it is found that the infrared spectrum of a PDIsaturated Au(111) surface, exposed to carbon monoxide at 80 K, displays a feature at *2004 cm -1 , characteristic of CO adsorbed on an atop site.…”

Section: Resultsmentioning

confidence: 99%

“…CO desorbs from Au(110)-(1 9 2) below 80 K, but at *180 K when the surface has been roughened by Argon ion bombardment [15]. At 300 K, Au(110) requires CO pressures of *0.1 Torr to adsorb [16] and CO only adsorbs on Au(100) at high pressures [17].…”

Section: Introductionmentioning

confidence: 99%

Creation of Low-Coordination Gold Sites on Au(111) Surface by 1,4-phenylene Diisocyanide Adsorption

et al. 2011

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The adsorption of CO on a saturated overlayer of 1,4-phenylene diisocyanide (PDI) adsorbed on a Au(111) surface at 300 K is studied using scanning tunneling microscopy (STM), density functional theory (DFT) calculations and reflection absorption infrared spectroscopy (RAIRS). The PDI forms closed-packed rows of gold-PDI chains by extracting gold atoms from the Au(111) substrate. They are imaged by STM and the structure calculated by DFT. The adsorption of CO is studied on the low-coordination gold sites formed on the PDI-covered surface where it adsorbs exhibiting a CO stretching frequency of 2004 cm -1 , consistent with adsorption on an atop site. It is found that CO is stable on heating the sample to *150 K and is only removed from the surface by heating to *180 K. Since low-coordination gold atoms are suggested to be the active catalytic sites on supported gold nanoclusters, ''embossing'' the surface to form similar lowcoordination sites using PDI might offer a strategy for tailoring the catalytic activity of gold.

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“…These authors had already investigated the adsorption of CO on Au(110), by STM at high pressures (1-500 Torr) [44] and in their recent study [43] they presented results concerning the first steps of the modification of Au(110) surface at intermediate pressures (0.001-1 Torr). In this way, a rather comprehensive view of the evolution of the surface structure of Au(110) from 10 -9 to 500 Torr was obtained.…”

Section: Carbon Monoxide Adsorption On Clean and O Precovered Surfacesmentioning

confidence: 99%

Adsorption of small molecules on gold single crystal surfaces

Carabineiro

Nieuwenhuys

2009

Gold Bull

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Much more work has been carried out on supported gold catalysts (also called "real" catalysts) than on gold single crystal surfaces. However, for fundamental understanding of catalysis by gold, well-defined gold surfaces and controlled conditions using the surface science approach may provide useful information concerning reaction mechanisms and the nature of active centers. This paper presents a brief overview on the work carried out regarding adsorption of several small molecules on

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CO chemisorption on Au(110) investigated under elevated pressures by polarized reflection absorption infrared spectroscopy and scanning tunneling microscopy

Cited by 111 publications

References 24 publications

Surface chemistry of catalysis by gold

Surface chemistry of catalysis by gold

Creation of Low-Coordination Gold Sites on Au(111) Surface by 1,4-phenylene Diisocyanide Adsorption

Adsorption of small molecules on gold single crystal surfaces

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