Adsorption on copper

Relative adsorphon affinities of different funchonal groups on the ambient-exposed Cu films have been determined by immersing the films in THF solutions containing two differently-functionalized organic molecules. Their preferential adsorption decreased in the order -NC[l,4-C,sH4(NC)2] -SH[1,4- 

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Clearly the molecular events with iron were complex even at 80 K and low NO pressure, and in order to unravel details we chose to study NO adsorption on copper (42), a metal known to be considerably less reactive in chemisorption than iron. It was anticipated, by analogy with carbon monoxide, that nitric oxide would be molecularly adsorbed on copper at 80 K. This, however, was shown to be incorrect (43), and by contrast it was established that the molecule not only dissociated at 80 K, but NjO was generated catalytically within the adlayer. On warming the adlayer formed at 80 K to 295 K, the surface consisted entirely of chemisorbed oxygen with no evidence for nitrogen adatoms. It was the absence of nitrogen adatoms [with their characteristic N(ls) value] at both 80 and 295 K that misled us (43) initially to suggest that adsorption was entirely molecular at 80 K. 

Azole compounds such as benzotriazole, benzimidazole, indazole and imidazoles are efficient anti-corrosion agents for copper and copper-base alloys [1-10]. Many experimental techniques [11-15] have been used to study the corrosion inhibition mechanisms, however, the mechanisms are still not well understood. It is believed that the complex formation between copper and nitrogen atoms would inhibit oxygen adsorption on copper surface [16-20]. 

Zhang et al. have studied the influence of bromine adsorption on copper electrodeposition on pc-Au electrodes modified with SAMs [415]. 

In further experiments (Collins Eggleton, 1965), miniature irradiated U02 fuel elements were heated to 1500°C in either CC /CO or C02/air mixtures. Between 30 and 50% of I, Te and Cs fission products were released, but less than 0.2% of Sr. In C02/air the released iodine was mainly elemental (as determined by adsorption on copper gauzes in May Packs). In C02/CO, iodine was released as a mixture of alkyl iodides, with methyl iodide dominant. The mode of formation of alkyl iodides in these experiments remains uncertain. 

Albumin Adsorption on Copper and Nickel Thin Films... 

Name some of the functional groups that favor surface adsorption on copper metal. 

A similar investigation of carbon dioxide adsorption on reduced nickel leads to the conclusion that the best agreement is obtained under the assumption that n is 3, i.e., that the CO2 molecule completely dissociates on adsorption (45). On the other hand, agreement is obtained for carbon dioxide adsorption on copper ferrite for w = 2. On ferric oxide the assumption of n = 1, tentatively suggested by the nearly direct proportionality... 

In their studies of carbon dioxide adsorption on copper oxide Garner and his associates (54) assume the formation of a carbonate ion held by forces of electrovalency to the oxide surface. A decision for or against this concept may be obtainable by a study of the exchange reaction, for... 

Fig. 12.9. Relative extent of hydrogen adsorption on copper-nickel...

Cadenhead, D.A. and Wagner, N.J. "Low-temperature hydrogen adsorption on copper-nickel alloys."/. Phys. Chem. 72 2775-2781 1968. 

Table 2 Surface species formed by CO adsorption on copper-containing aluminophosphates, and their stretching frequencies [cm ]...

Figure 3.4 Langmuir interpretation of H2 adsorption on copper powder. [After A.F.H. Ward, Proc. Roy. Soc. (London), A133, 506 with permission of The Royal Society, (1931).]...

The first case (a) discussed above is nicely demonstrated in a study of carbon monoxide adsorption on copper in contact with an aqueous solution of 0.1 M KCIO4 [204] only a single-sided band of the CO-stretching vibration is observed at 2110 cm-i (Fig. 5.51). 

More specialized materials also may be used. Adsorption on copper/aluminum oxide or silver/zinc oxide reduces the mercury level to less than 1 p,g m [119]. 

EIS characterization of laprol 2402C adsorption on copper, tin and bronze electrodes. Chemistry (Vilnius), 12 (3), 210-215,... 

Studies on the hindered hydrotris(pyrazolyl)borate complexes of the Cu(CO) unit show a good correlation between vCO and the 5( Cu) NMR chemical shift. " CO adsorbed on CuCl film microcrystals shows vCO at 2134 cm -evidence for very weak Ti-interactions between CO and CuCl. " Several groups have reported studies on CO adsorption on copper centres supported in zeolites.147-150 values were used to probe structural changes in the CO-adduct of Cub in cytochrome bo, from E. coli ... 

Exponentially decaying orbital are required for accurate representation of the atom-atom interactions involved in molecular adsorption on a solid surface. The present application involves CO adsorption on copper. This modifies the carbon partial charge so that it becomes the seat of nucleophilic attack. 

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