Carbon monoxide influence

Even the precovering with hydrogen is able to block the surface against electronic interaction. In Fig. 27 a nickel surface was precovered with hydrogen at 3 X 10 mm. Hg to saturation (0 = 0.39), causing an irreversible resistance decrease of 1%. After pumping off at B, carbon monoxide of 6 X 10 mm. Hg was added at Aco- At a pure nickel surface the carbon monoxide influence would have effected an increase of the resistance by 0.8%. At the surface precovered with hydrogen, neither a resistance effect nor a carbon monoxide adsorption is to be observed. 

D.A. Wesner, F.P. Coenen and H.P. Bonzel, Influence of potassium on carbon monoxide hydrogenation over iron A surface analytical study, Langmuir 1, 478-487 (1985). 

Thermal inversions make winter the most unfavorable season for clean air. Vast differences in air quality are found in the industrialized north, and the residential southwest regions. Particulate matter influences mainly the north, where industries, landfills, and the dried bed of Texcoco Lake are located. Sulfur oxides impinge primarily on the northeast and southwest. High carbon monoxide concentrations are found in heavy traffic areas such as the northwest. Ozone affects predominantly the southwest at any season. We have selected air quality records from data generated by stations registering the higher pollutant levels, as follows ... 

Fraisse L, H Simon (1988) Observations on the reduction of non-activated carboxylates by Clostridium formicoaceticum with carbon monoxide or formate and the influence of various viologens. Arch Microbiol 150 381-386. 

Chang S-C, Weaver MJ. 1991. Influence of coadsorbed bismuth and copper on carbon monoxide adlayer stmctures at ordered low-index platinum-aqueous interfaces. Surf Sci 241 11-24. 

Hayden BE, Murray AJ, Parsons R, Pegg DJ. 1996. UHV and electrochemical transfer studies on Pt(110)-(1 X 2) The influence of bismuth on hydrogen and oxygen adsorption, and the electro-oxidation of carbon monoxide. J Electroanal Chem 409 51-63. 

Leung L-WH, Weaver MJ. 1990. Influence of adsorbed carbon monoxide on the electrocatalytic oxidation of simple organic molecules at platinum and palladium electrodes in acidic solution A survey using real-time FITR spectroscopy. Langmuir 6 323-333. 

Breiter MW. 1975. Influence of chemisorbed carbon monoxide on the oxidation of molecular hydrogen at smooth platinum in sulfuric acid solution. J Electroanal Chem 65 623-634. 

Fe/Ir catalysts In situ Fe and Ir Mossbauer spectroscopy of silica-supported Fe/Ir catalysts with different iron to iridium ratios following pretreatment in hydrogen show that the reduction of the Fe component is enhanced by the presence of Ir metal. The presence of Ir was found to increase the catalytic activity in hydrogenation of carbon monoxide and also to influence selectivity... 

At the present, it is difficult to predict a distinct rhodium catalyst showing the appropriate properties. Furthermore, the reaction conditions applied will influence the outcome of the reaction also. Low carbon monoxide pressure favours p-hydride elimination by enhanced CO dissociation which allows for the formation of vacant sites at the metal... 

Roels HA, Hubermont G, Buchet J-P, et al. 1978. Placental transfer of lead, mercury, cadmium, and carbon monoxide in women III. Factors influencing the accumulation of heavy metals in the placenta and the relationship between metal concentration in the placenta and in maternal and cord blood. 

Park PW, Ledford JS (1998) The influence of surface structure on the catalytic activity of cerium promoted copper oxide catalysts on alumina oxidation of carbon monoxide and methane. Catal Lett 50(1—2) 41 48... 

With respect to the thermodynamic stability of metal clusters, there is a plethora of results which support the spherical Jellium model for the alkalis as well as for other metals, like copper. This appears to be the case for cluster reactivity, at least for etching reactions, where electronic structure dominates reactivity and minor anomalies are attributable to geometric influence. These cases, however, illustrate a situation where significant addition or diminution of valence electron density occurs via loss or gain of metal atoms. A small molecule, like carbon monoxide,... 

It is generally accepted that localization and coordination of monovalent Cu ions in different zeolites have significant influence on the catalytic activity. The localization and coordination of Cu ions was studied by means of adsorption of small probe molecules, in particular, carbon monoxide was used often due to its ability to form a stable mono-carbonyl complex with the Cu+ ion. The formation of this complex was investigated by the FTIR and by the microcalorimetry [1-3]. 

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