Infrared spectroscopic studies of CO adsorption by metals. The effect of other gases in adsorption

Guerra, Cosimo

doi:10.1016/0021-9797(69)90191-x

Cited by 23 publications

(3 citation statements)

References 10 publications

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“…This shift, which is opposite in direction to group VIII metals, is typical for group IB metals (10). While the strength of adsorption and the coverage dependent band shifts were characteristic for Au, the observed CO band position on the reduced Au/SiOz pellet was significantly lower than the previously reported wavenumbers (2)(3)(4)(5)(6)(7)(8)(9). In view of this rather unusual band position, an unreduced Au/SiOz pellet was exposed to CO. A band was found at 2175 cm-' (Fig.…”

Section: Resultscontrasting

confidence: 74%

Infrared spectroscopic study of NO reduction by H2 on supported gold catalysts

LEE

1986

Journal of Catalysis

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In siru Fourier transform infrared spectroscopy is used to study the reduction of NO by HI on Au/SiO* and AuiMgO catalysts. On these catalysts, large differences in selectivity toward Nz formation had been found depending on the nature of the support. These differences are correlated with transient infrared spectral features which appear during reaction. NO by itself does not give rise to a band attributable to NO adsorbed on Au, however, exposure of supported Au to NO renders the catalyst unable to adsorb CO. Preadsorbed CO, on the other hand, is displaced from the Au catalysts by NO.

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Section: Resultscontrasting

confidence: 74%

Infrared spectroscopic study of NO reduction by H2 on supported gold catalysts

LEE

1986

Journal of Catalysis

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“…Figure 1 can be demonstrated that a decrease in the CO vibrational frequency coincides with a decrease in the bond order (38,39) • While metals to the right of the dividing line in Fig. 1 will , adsorb CO associatively at room temperature, dissociative adsorption can occur at higher temperatures.…”

Section: Associative and Dissociative Chemisorption Of Carbon Monoxidementioning

confidence: 92%

Catalytic Synthesis of Hydrocarbons over Group VIII Metals. A Discussion of the Reaction Mechanism

Bell¹

1981

Catalysis Reviews

375

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“…An increase in the reduction temperature suppresses the bridge coordinated CO IR bands, decreases the intensity and slightly shifts the stretching frequency of linearly adsorbed CO to higher wavenumbers. Such shift occurs when CO is chemisorbed on the sulfur-saturated Pd surface (Guerra, 1969;Jorgensen & Madix, 1985). So, appearance of the band at 2105-2108 cm −1 can be attributed to linear CO complexes with palladium in an electron-deficient state with high S-coverage.…”

Section: State Of Palladium In Pd/sz Catalystsmentioning

confidence: 98%