CO catalytic oxidation

Nettesheim S, von Oertzen A, Rotermund FI FI and ErtI G 1993 Reaction diffusion patterns in the catalytic CO-oxidation on Pt(110) front propagation and spiral waves J. Chem. Rhys. 98 9977-85... 

P. Moller, K. Wetzl, M. Eiswirth, G. Ertl. Kinetic oscillations in the catalytic CO oxidation Computer simulations. J Chem Phys 55 5328-5334, 1986. 

V. N. Kusovkov, O. Kortluke, W. von Niessen. Kinetic oscillations in the catalytic CO oxidation on Pt single crystal surfaces Theory and simulation. J Chem Phys 705 5571-5580, 1998. 

J. Poppe, S. Voelkening, A. Schaak, E. Schuetz, J. Janek, and R. Imbihl, Electrochemical promotion of catalytic CO oxidation on Pt/YSZ catalysts under low pressure conditions, Phys. Chem. Chem. Phys. 1,5241-5249 (1999). 

K. Asakura, J. Lanterbach, H.H. Rothermund, and G. Ertl, Spatio-temporal pattern formation during catalytic CO oxidation on a Pt(100) surface modified with submonolayers of Au, Surf. Sci. 374, 125-141 (1997). 

S. Kelling, S. Cerasari, H.H. Rotermund, G. Ertl, and D.A. King, A photoemission electron microscopy (PEEM) study of the effect of surface acoustic waves on catalytic CO oxidation over Pt(110), Chem. Phys. Lett. 293, 325-330 (1998). 

S. Ladas, R. Imbihl, and G. Ertl, Kinetic Oszillatotions during the catalytic CO oxidation on Pd(110) The role of subsurface oxygen, Surf. Sci. 219, 88-106 (1989). 

Zhang CJ, Hu P. 2000. Why must oxygen atoms be activated from hohow sites to bridge sites in catalytic CO oxidation J Am Chem Soc 122 2134-2135. 

Over H, Muhler M. 2003. Catalytic CO oxidation over ruthenium—Bridging the pressure gap. Prog Surf Sci 72 3. 

Lopez N, Nprskov JK. 2002. Catalytic CO oxidation by a gold nanoparticle A density functional study. J Am Chem Soc 124 11262-11263. 

Ortho-para deuterium, 27 25, 50 Ortho-para hydrogen conversion, 27 23 Oscillatory catalytic reactions, 37 213-215, 271-272 see also Platinum catalytic CO oxidation on Pt(l 11) and Pt(llO) surfaces COj formation, 37 216-217 kinetic oscillation mechanism, 37 220-228... 

In situ infrared study of catalytic CO oxidation over Au/Ti02 shows that the catalyst prepared from AuCls exhibits higher activity than those prepared from HAuC. The high activity of Au appears to be related to the presence of reduced and oxidized Au sites as well as carbonate/carboxylate intermediates during CO oxidation. Addition of H2O2 further promotes the oxidation reaction on Au/Ti02 catalysts. 

Onken, H. U. and Wicke, E. (1986). Statistical fluctuations of temperature and conversion at the catalytic CO oxidation in an adiabatic packed bed reactor. Ber. Bunsenges. Phys. Chem., 90, 976-81. 

Fig. 3. Steady-stale oxygen coverage during catalytic CO oxidation as a function of pCo and T as calculated from Eqs. (3) and (4) with parameters adopted from experimental data for Pt(110). (From Ref. 16.)...

Figure 4 shows a typical example of sustained kinetic oscillations occurring for particular conditions (pc0, p0r and T) during the catalytic CO oxidation on a Pt(llO) surface (40). The measurements were performed with an UHV system acting as flow reactor, where the C02 partial pressure is directly proportional to the rate. The simultaneously recorded CO pressure oscillates with the same period and with amplitudes of about 1%, whereby pco shows a minimum whenever the reaction rate is maximum. The work function A varies parallel to the rate R. This quantity is essentially determined by the oxygen coverage. Because under oscillatory conditions the rate is determined by oxygen adsorption (see above), it becomes plausible why A and R vary in phase. 

The catalytic CO oxidation by pure oxygen was selected as a model reaction. The Pt/alumina catalyst In the form of 3.4 mm spherical pellets was used. The CO used In this study was obtained by a thermal decomposition of formic acid In a hot sulphuric acid. The reactor was constructed by three coaxial glass tubes. Through the outer jacket silicon oil was pumped, while air was blown through the inner jacket as a cooling medium. The catalyst was placed in the central part of the tube. The axial temperature profiles were measured by a thermocouple moving axially in a thermowell. Gas analysis was performed by an infrared analyzer or by a thermal conductivity cell. [7]. 

For example, key intermediates of the catalytic CO oxidation on rhodium and on platinum at elevated pressure are not present under vacuum conditions (Somorjai and Rupprechter, 1999). These "gaps" in materials and pressure have to be bridged to establish quantitative structure-activity relationships (Topsoe, 2000 Wachs, 2003a, 2003b, 2003c). Raman spectroscopy is one of the most useful techniques for bridging these "gaps" and is the focus of this chapter. 

R. Danielak, A. Perera, M. Moreau, M. Frankowicz, and R. Kapral, Surface structure and catalytic CO oxidation oscillations, Physica A, 229 (1996) 428. 

Socaciu LD, Hagen J, Bernhardt TM, Woste L, Heiz U, Hakkinen H, Landman U (2003) Catalytic CO oxidation by free Au-2(-) Experiment and theory. J Am Chem Soc 125 10437... 

Ackermann MD, Pedersen TM, Hendiiksen BLM, Robach O, Bobaru SC, Popa I, et al. (2005). Structure and reactivity of surface oxides on Pt(llO) during catalytic CO oxidation. Phys Rev Lett, 95, 255505... 

P. Hu and A. Alavi (2001) Insight into electron-mediated reaction mechanisms Catalytic CO oxidation on a ruthenium surface. J. Chem. Phys. 114, p. 8113... 

Fig. 1.34. Catalytic CO oxidation by N2O in an ICR mass spectrometer [24]. The ICR signal shown obtained for Fe+ while scanning the double-resonance oscillator to eject ions of a given mass from the ceU. Trace B is obtained with only N2O present in the trap. Trace A results when CO is added in addition to N2O to the ion trap. The increase in Fe+ signal after adding CO is caused by the regeneration of Fe in the catalytic reaction cycle indicated in the inset. This is evidenced by the double resonance at 72amu (FeO ), which indicates that FeO+ is reacting to Fe ...

Catalytic CO Oxidation by Free Au2. The potential catal3dic activity of Au2 in the CO combustion reaction was first predicted by Hakkinen and Land-man [382]. The subsequent experimental investigation employing an rf-ion trap indeed revealed the catalytic reaction of the gold dimer and, in conjunction with theory, a detailed reaction cycle could be formulated [33]. Also for particular larger gold cluster anions evidence for catalytic CO2 formation has... 

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