Adsorption of oxygen and hydrogen on Au(110)-(1 × 2)

Sault, Allen G.; Madix, Robert J.; Campbell, Charles T.

doi:10.1016/0039-6028(86)90616-3

Cited by 259 publications

(169 citation statements)

References 33 publications

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“…There are only a few studies that investigate the interaction of hydrogen with gold. On Au(110) (1 x 2) surfaces no hydrogen chemisorption was observed (61). Weak adsorption of a small amount of hydrogen was found on thin, unsintered gold films: At a pressure of 0.3 Pa and a temperature of 78 K, the hydrogen coverage was less than 0.015 (62).…”

Section: Interaction Of Gold and Hydrogenmentioning

confidence: 96%

Hydrogenation over gold catalysts: The interaction of gold with hydrogen

Kartusch

Bokhoven

2009

Gold Bull

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Section: Interaction Of Gold and Hydrogenmentioning

confidence: 96%

Hydrogenation over gold catalysts: The interaction of gold with hydrogen

Kartusch

Bokhoven

2009

Gold Bull

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“…The H 2 uptake recorded for Au/Al 2 O 3 is close to the instrumental detection limit. It is, however, known that a high activation barrier inhibits a dissociative adsorption of hydrogen on group IB metals [55,56] where the adsorption capacity of supported Au is dependent on the nature of the Au coordination to the support. [57] Dissociative adsorption of hydrogen on supported Au appears to occur on low coordination sites (edges and corners).…”

Section: Hydrogen Uptakementioning

confidence: 99%

Alumina‐Supported Ni–Au: Surface Synergistic Effects in Catalytic Hydrodechlorination

et al. 2009

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Catalytic gas‐phase hydrodechlorination (HDC) of 2,4‐dichlorophenol (2,4‐DCP) has been investigated over Ni/Al2O3 and Au/Al2O3 prepared by impregnation, and Au–Ni/Al2O3 prepared by reductive deposition of Au onto Ni. Catalyst activation by temperature‐programmed reduction is examined and the activated catalysts are characterized in terms of H2 chemisorption, XRD and TEM‐energy dispersive X‐ray (EDX) measurements. Ni/Al2O3 (<1–10 nm) and Au/Al2O3 (<1–15 nm) exhibit a relatively narrow metal size distribution while Au–Ni/Al2O3 bore larger particles (1–30 nm) with variable surface Ni/Au ratios. Au/Al2O3 exhibits low H2 uptake and low HDC activity to generate 2‐chlorophenol (2‐CP) as the sole product. H2 chemisorption on Au–Ni/Al2O3 was approximately five times lower than that recorded for Ni/Al2O3 but both catalysts delivered equivalent initial HDC activities. Ni/Al2O3 exhibits an irreversible temporal deactivation where partial dechlorination to 2‐CP is increasingly favored over full dechlorination to phenol. In contrast, thermal treatment of Au–Ni/Al2O3 in H2 after reaction elevates HDC activity with a preferential full HDC to phenol. This response is linked to a surface reconstruction resulting in a more homogeneous combination of Ni and Au. This result was also achieved by a direct treatment of Au–Ni/Al2O3 with HCl. A parallel/ consecutive kinetic model is used to quantify the catalytic HDC response.

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“…Sault et al examined the adsorption of atomic hydrogen on Au(110) using the hot filament technique that was successful for atomic oxygen dosing (109). Hydrogen was observed to desorb in a single peak at 216 K. Stobinski found that while hydrogen and deuterium will not adsorb at all on sintered gold films, molecular chemisorption was observed on unsintered films at 78 K (110).…”

Section: 2mentioning

confidence: 99%

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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Adsorption of oxygen and hydrogen on Au(110)-(1 × 2)

Cited by 259 publications

References 33 publications

Hydrogenation over gold catalysts: The interaction of gold with hydrogen

Hydrogenation over gold catalysts: The interaction of gold with hydrogen

Alumina‐Supported Ni–Au: Surface Synergistic Effects in Catalytic Hydrodechlorination

Surface chemistry of catalysis by gold

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