Catalytic oxidation of carbon monoxide

Very recently, considerable effort has been devoted to the simulation of the oscillatory behavior which has been observed experimentally in various surface reactions. So far, the most studied reaction is the catalytic oxidation of carbon monoxide, where it is well known that oscillations are coupled to reversible reconstructions of the surface via structure-sensitive sticking coefficients of the reactants. A careful evaluation of the simulation results is necessary in order to ensure that oscillations remain in the thermodynamic limit. The roles of surface diffusion of the reactants versus direct adsorption from the gas phase, at the onset of selforganization and synchronized behavior, is a topic which merits further investigation. 

H. P. Kaukonen, R. M. Nieminen. Computer simulations studies of the catalytic oxidation of carbon monoxide on platinum metals. J Chem Phys 97 4380- 386, 1989. 

Brittan, Bliss, and Walker [AIChE J., 16 (305), 1970] have studied the catalytic oxidation of carbon monoxide,... 

Reaction Rate Resonance in the Concentration Cycling of the Catalytic Oxidation of Carbon Monoxide... 

Catalytic oxidation of carbon monoxide is studied in problem P3.07.06. The change in pressure is given as a function of the time in the first two columns of the table. Polynomials of several degrees are fitted to the data and the derivatives, -dP/dt, are found at selected points by POLYMATH. Values derived from degrees 3, 4 and 5 agree fairly well. 

Catalytic oxidation of carbon monoxide was studied at constant volume at 300 C and initial pressure of 204 torr. Data of time against drop in total pressure (Prettre Claudel, 26, 1970) are tabulated. They are fitted to a cubic polynomial,... 

Figure 15.8 a simple example is presented of a subsequent insertion of CO and methanolysis of the palladium acyl intermediate [14], This is not a very common reaction, because both the ligand requirements and the redox conditions for Wacker and carbonylation chemistry are not compatible. For insertion reactions one would use cis coordinating diphosphines or diimines, which makes the palladium centre more electron-rich and thus the nucleophilic attack in the Wacker part of the scheme will be slowed down. In addition, the oxidants present may lead to catalytic oxidation of carbon monoxide. 

Bodenstein and Ohlmer s Zeit, Phys, Chem. liii. 160, 1905) investigation on the catalytic oxidation of carbon monoxide at the surface of crystalline and fused quartz likewise indicate that the differentiation in surface of activity due to atomic arrangement may lead to a difference in the reaction mechanism. On the more active fused quartz we find that carbon monoxide is strongly adsorbed (probably however on patches of limited area) and the reaction rate is accordingly given by... 

The analogy goes further if the activity of NiO as an oxidation catalyst is examined closely. In the case of the H2-D2 exchange reaction on ZnO, there was an activation period corresponding to a surface reduction. For NiO, there is a deactivation period also corresponding to surface reduction during the catalytic oxidation of carbon monoxide. 

Ertl, G. (1989). The oscillatory catalytic oxidation of carbon monoxide on platinum surfaces. In Spatial inhomogeneities and transient behaviour in chemical kinetics, (ed. P. Gray, G. Nicolis, F. Baras, P. Borckmans, and S. K. Scott), ch. 37, pp. 563—76. Manchester University Press. 

From the calorimetric study of the first sequence of adsorptions, it is possible to propose a mechanism (I) for the catalytic oxidation of carbon monoxide on NiO(250). 

Following the initial work by Langmuir (7) the catalytic oxidation of carbon monoxide on platinum has been investigated frequently with polycrystalline samples (132, 183-190) as well as with single crystal surfaces (149, 151, 191-197) by applying stationary and nonstationary methods including the molecular beam technique. The general trends observed are... 

Catalytic oxidation of carbon monoxide CO in car exhaust reactors. 

In 1976, Breysse et al. found that chemiluminescence is emitted during catalytic oxidation of carbon monoxide on thoria ThCh, and named it cataluminescence (CTL) [6]. As the CTL intensity depends linearly on the rate of the catalytic oxidation, this is applicable to the detection of combustible gases. 

In 1976, Breysse et al. [6] observed CTL emission during the catalytic oxidation of carbon monoxide on a thoria surface. This luminescence is ascribed to fight emission during catalysis in an atmosphere containing oxygen. This implies that carbon monoxide in the air can be detected continuously without any consumption of sensor substance by the measurement of the CTL emission from a thoria surface. 

Catalytic Oxidation of Carbon Monoxide. - This reaction has been used by several authors as a simple test reaction in the field of catalytic oxidation. Hirota et al.115 conclude from tracer experiments that this follows an oxidation-reduction mechanism in which lattice oxygen is used. In the mechanism proposed, two neighbouring (V=0) groups are successively reduced by CO and are then simultaneously reoxidized. 

Heiz, U., Sanchez, A., Abbet, S., and Schneider, W.-D., Catalytic oxidation of carbon monoxide on monodispersed platinum clusters Each atom counts. J. Am. Chem. Soc. 121, 3214 (1999). 

One of the most extensively studied reactions in the past years, and whose elementary steps appears to be best understood, is the catalytic oxidation of carbon monoxide on a Pt catalyst [23] ... 

The dependence of the action of an additive upon temperature is well illustrated (Fig. 11) by the data of Element (96), who studied the catalytic oxidation of carbon monoxide over nickel oxide promoted with barium... 

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