On the Oxidation of Gold

Shishakov, N. A.

doi:10.1021/j100839a508

Cited by 9 publications

(3 citation statements)

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“…However, the surface of gold single crystals cannot be populated with chemisorbed molecular or dissociated oxygen, no matter how large the exposure to molecular oxygen (79,95), except at very high temperatures as described in Comsa's work (45)(46)(47)(48)(49). Although some early research reported chemisorption of oxygen (96)(97)(98), later work has ascribed these results to oxygen dissociation on calcium or silicon impurities (99,100). This has led researchers to employ other means to deliver oxygen to the surface.…”

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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Section: 2mentioning

confidence: 99%

Surface chemistry of catalysis by gold

et al. 2004

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“…There have been many efforts over the years to investigate the interaction of oxygen with gold surfaces to better understand the unique oxidative catalytic properties of gold catalysts. Gold single-crystal surfaces do not measurably chemisorb oxygen either molecularly or dissociatively under ultrahigh vacuum (UHV) conditions or at elevated temperatures and pressures; , however, molecular oxygen physically adsorbs up to ∼50 K (physisorbed oxygen cannot be transferred to a chemisorbed state by simply annealing the surface). , Although some earlier investigations reported chemisorption of molecular oxygen on gold surfaces, − researchers presented evidence later showing that the observed oxygen dissociation was actually induced by calcium , or silicon impurities.…”

Section: Adsorption Of Molecules/atoms On Au Single-crystalline Surfacesmentioning

confidence: 99%

Structure and Surface Chemistry of Gold-Based Model Catalysts

2011

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“…The stable adsorption of 0.6 monolayer in dry air may be due to a film of gold oxide [17]. In the wet atmospheres, however, adsorption may have been on a water film on the gold.…”

Section: Figure 2 Adsorption Of Radiostearic Acid Onto Iron Filmsmentioning

confidence: 99%

Direct Measurement of Adsorption of Radiostearic Acid onto Vapor-Deposited Metal Films

Walker¹,

Ries²

1964

Advances in Chemistry

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Radiostearic acid was adsorbed from n-hexadecane onto mica and thin vapor-deposited films of iron, gold, and copper that had been exposed to dry and water-saturated helium or air. Adsorption was measured directly and continuously by a recently developed technique. The mica substrate showed essentially zero adsorption. None of the metals adsorbed more than one stable compact monolayer. Iron and gold showed a large difference in adsorption in dry helium or air, but adsorbed about the same amount, 0.2 to 0.5 monolayer, when exposed to either wet helium or air. Copper adsorbed 0.3 to 0.7 monolayer in all atmospheres except wet air, in which it showed a weak adsorption of nine monolayers; rinsing with hexane removed all but one monolayer.In most techniques for studying adsorption on metals, uniform, clean, and reproducible metal surfaces are difficult to prepare and the adsorption process cannot be followed continuously [2, 3,4, 7,10,11,16, 18, 21], Clean and reproducible metal surfaces are also difficult to prepare and maintain in methods that measure adsorption continuously and directly on a metal-coated window of a Geiger tube [l, 6,7,13]. A recently developed apparatus and technique provide controlled conditions for the production and maintenance of relatively clean metal films and the precise measurement of adsorption [20]. Metal is evaporated onto a mica window supported within a high-vacuum apparatus; adsorption onto the metal film is measured directly and continuously by a counter tube below the window.Reported previously were results of the adsorption of radiostearic acid from dilute n-hexadecane solution onto the mica substrate and 295 Downloaded by UNIV OF MICHIGAN ANN ARBOR on February 18, 2015 |

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On the Oxidation of Gold

Abstract: I. Hydrogen exchange at 150°.

Cited by 9 publications

References 0 publications

Surface chemistry of catalysis by gold

Surface chemistry of catalysis by gold

Structure and Surface Chemistry of Gold-Based Model Catalysts

Direct Measurement of Adsorption of Radiostearic Acid onto Vapor-Deposited Metal Films

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