Synchrotron radiation study of chemisorptive bonding of CO on transition metals — Polarization effect on Ir(100)

Brodén, G.; Rhodin, T. N.; Brucker, C. F.; Benbow, R. L.; Hurych, Z.

doi:10.1016/0039-6028(76)90038-8

Cited by 428 publications

(133 citation statements)

References 61 publications

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“…It has been reported that manganese oxide could act as surface basicity as alkali metal does [27,28], or in other words, manganese oxide might act as a strong electron donor. This electron donating effect will in turn alter the biding energy [29]. Hence, it can be inferred that in a highly dispersed system (like in the case of CP-2), the basicity characteristic of Mn could function more efficiently.…”

Section: Discussionmentioning

confidence: 99%

CO Hydrogenation to Light Alkenes Over Mn/Fe Catalysts Prepared by Coprecipitation and Sol-gel Methods

Wang

Sun

et al. 2005

Catal Lett

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CO hydrogenation to light alkenes was carried out on manganese promoted iron catalysts prepared by coprecipitation and sol-gel techniques. Addition of manganese in the range of 1-4 mol.% by means of coprecipitation could improve notably the percentage of C 2 = $C 4 = in the products, but it was not so efficient when the sol-gel method was employed. XRD and H 2 -TPR measurements showed that the catalyst samples giving high C 2 = $C 4 = yields possessed ultrafine particles in the form of pure a-(Fe 1-x Mn x ) 2 O 3 , and high quality in lowering the reduction temperature of the iron oxide. Furthermore, these samples displayed deep extent of carburization and different surface procedures to the others in the tests of Temperature Programmed Surface Carburization (TPSC). The different surface procedures of these samples were considered to have close relationship with the evolving of surface oxygen. It was also suggested that for the catalysts with high C 2 = $C 4 = yields, the turnover rate of the active site could be kept at a relatively high level due to the improved reducing and carburizing capabilities. Consequently, there would be a large number of sites for CO adsorption/dissociation and an enhanced carburization environment on the catalyst surface, so that the process of hydrogenation could be suppressed relatively to a low level. As a result, the percentage of the light alkenes in the products could be raised.

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Section: Discussionmentioning

confidence: 99%

CO Hydrogenation to Light Alkenes Over Mn/Fe Catalysts Prepared by Coprecipitation and Sol-gel Methods

Wang

Sun

et al. 2005

Catal Lett

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“…The general behavior of carbon monoxide chemisorbed to transition metals has been recently reviewed by Broden et al (17). These authors correlate the position of a metal in the periodic table with the ability to dissociatively chemisorb carbon monoxide.…”

Section: Reactant/product-catalyst Interactionsmentioning

confidence: 99%

“…These authors correlate the position of a metal in the periodic table with the ability to dissociatively chemisorb carbon monoxide. It was determined that the electronic nature of the metal itself is the primary factor in deter mining the nature of the chemisorption, and the metal surface geometry is only a second order effect (17). In other words, the metal surface geometry is important in determining associative versus dissociative adsorption, only for those metals that border the electronic effect dividing line in the periodic table, for these two modes of chemisorp tion.…”

Section: Reactant/product-catalyst Interactionsmentioning

confidence: 99%

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Reduction of nitric oxide with carbon monoxide on the Rh(100) single-crystal surface

HENDERSHOT

1986

Journal of Catalysis

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“…According to Brodèn et al. 3,4 dissociative CO binding is found at room temperature for the metals left of a diagonal through the periodic system formed by the elements cobalt, ruthenium, and rhenium. For all metals we have previously studied it is seen that the transition from dissociative to molecular binding of carbon monoxide to surfaces also holds for CO bound to gas-phase metal clusters.…”

Section: Introductionmentioning

confidence: 99%

Probing C–O bond activation on gas-phase transition metal clusters: Infrared multiple photon dissociation spectroscopy of Fe, Ru, Re, and W cluster CO complexes

Lyon

Gruene

Fielicke

et al. 2009

The Journal of Chemical Physics

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The binding of carbon monoxide to iron, ruthenium, rhenium, and tungsten clusters is studied by means of infrared multiple photon dissociation (IR-MPD) spectroscopy. The CO stretching mode is used to probe the interaction of the CO molecule with the metal clusters and thereby the activation of the C-O bond. CO is found to adsorb molecularly to atop positions on iron clusters. On ruthenium and rhenium clusters it also binds molecularly. In the case of ruthenium, binding is predominantly to atop sites, however higher coordinated CO binding is also observed for both metals and becomes prevalent for rhenium clusters containing more than 9 atoms. Tungsten clusters exhibit a clear size dependence for molecular vs. dissociative CO binding. This behavior denotes the crossover to the purely dissociative CO binding on the earlier transition metals such as tantalum.2

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Synchrotron radiation study of chemisorptive bonding of CO on transition metals — Polarization effect on Ir(100)

Cited by 428 publications

References 61 publications

CO Hydrogenation to Light Alkenes Over Mn/Fe Catalysts Prepared by Coprecipitation and Sol-gel Methods

CO Hydrogenation to Light Alkenes Over Mn/Fe Catalysts Prepared by Coprecipitation and Sol-gel Methods

Reduction of nitric oxide with carbon monoxide on the Rh(100) single-crystal surface

Probing C–O bond activation on gas-phase transition metal clusters: Infrared multiple photon dissociation spectroscopy of Fe, Ru, Re, and W cluster CO complexes

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