Spatio-temporal pattern formation during CO oxidation on Pt(100) at low and intermediate pressures: A comparative study.

Experimental studies of CO oxidation on Pt(100) over two different ranges of reactant pressures will be reviewed. Using photoemission electron microscopy (PEEM), spatio-temporal pattern formation was observed at temperatures between 420 and 540 K in the 10(-5) mbar pressure range. In an attempt to bridge the "pressure-gap," ellipsomicroscopy for surface imaging was used to follow pattern formation at temperatures around 600 K in the 10(-2) mbar pressure range. The features of the nonlinear phenomena, observed in these two different pressure regimes, are markedly different. This is shown by comparison of various qualitative and quantitative features of spatio-temporal pattern formation as well as the dynamics of the macroscopic reaction rate. Subsurface oxygen is proposed as a tentative alternative to the surface phase transition for oscillations in the reaction rate at higher temperatures and intermediate pressures. (c) 2002 American Institute of Physics.

[1]  J. Lauterbach,et al.  Spatiotemporal patterns during CO oxidation on Pt(100) at elevated pressures , 2001 .

[2]  J. Lauterbach,et al.  Formation of surface oxides on Pt(100) during CO oxidation in the millibar pressure range , 2000 .

[3]  J. Lauterbach,et al.  Ellipsomicroscopy for surface imaging: contrast mechanism, enhancement, and application to CO oxidation on Pt(110). , 2000, Journal of the Optical Society of America. A, Optics, image science, and vision.

[4]  J. Lauterbach,et al.  Non-linear phenomena during CO oxidation in the mbar pressure range : a comparison between Pt/SiO2 and Pt(100) , 1999 .

[5]  H. Rotermund.  Imaging surface reactions with a photoemission electron microscope , 1999 .

[6]  J. Lauterbach,et al.  ELLIPSOMICROSCOPY FOR SURFACE IMAGING : A NOVEL TOOL TO INVESTIGATE SURFACE DYNAMICS , 1998 .

[7]  J. Lauterbach,et al.  A combined high-pressure reaction cell-ultrahigh vacuum chamber with sample transfer system , 1998 .

[8]  H. Rotermund.  Imaging of dynamic processes on surfaces by light , 1997 .

[9]  G. Ertl,et al.  Spatiotemporal pattern formation in reactions at surfaces , 1996 .

[10]  T. Mulvey.  Electron Microscopy and Analysis 1995 , 1996 .

[11]  D. King,et al.  Energetics and kinetics of CO and NO adsorption on Pt{100}: Restructuring and lateral interactions , 1996 .

[12]  D. King,et al.  Theoretical Inquiry into the Microscopic Origins of the Oscillatory CO Oxidation Reaction on Pt{100} , 1996 .

[13]  W. Sim,et al.  CO-induced removal of the Pt{100}-hex reconstruction studied by RAIRS , 1996 .

[14]  G. Ertl,et al.  Imaging pattern formation: Bridging the pressure gap , 1995 .

[15]  G. Ertl,et al.  Imaging Pattern Formation in Surface Reactions from Ultrahigh Vacuum up to Atmospheric Pressures , 1995, Science.

[16]  M. Bär,et al.  Spatiotemporal selforganization on isothermal catalysts , 1995 .

[17]  Gerhard Ertl,et al.  Oscillatory Kinetics in Heterogeneous Catalysis , 1995 .

[18]  J. Lauterbach,et al.  Subsurface oxygen on Pt(100) : kinetics of the transition from chemisorbed to subsurface state and its reaction with CO, H2 and O2 , 1994 .

[19]  J. Lauterbach,et al.  Spatio-temporal pattern formation during the catalytic CO-oxidation on Pt(100) , 1994 .

[20]  A. Schmid,et al.  On the complex structure of reaction-diffusion fronts observed during CO oxidation on Pt{100} , 1994 .

[21]  K Asakura,et al.  Effects of Boundaries on Pattern Formation: Catalytic Oxidation of CO on Platinum , 1994, Science.

[22]  Jochen A. Lauterbach,et al.  Gas-phase coupling in the CO oxidation reaction on polycrystalline platinum , 1994 .

[23]  J. Lauterbach,et al.  The formation of subsurface oxygen on Pt(100) , 1993 .

[24]  A. Bradshaw,et al.  Imaging reaction—diffusion fronts with low-energy electron microscopy , 1993 .

[25]  G. Ertl.  Self-organization in reactions at surfaces , 1993 .

[26]  D. King,et al.  Modelling the CO-induced surface phase transition on Pt{100}: implications for kinetic oscillations , 1993 .

[27]  M. Kordesch,et al.  A UHV-compatible photoelectron emission microscope for applications in surface science , 1991 .

[28]  G. Ertl,et al.  Methods and application of UV photoelectron microscopy in heterogenous catalysis , 1991 .

[29]  Engel,et al.  Spatiotemporal concentration patterns in a surface reaction: Propagating and standing waves, rotating spirals, and turbulence. , 1990, Physical review letters.

[30]  G. Ertl,et al.  Kinetic oscillations during the catalytic CO oxidation on Pd(110): The role of subsurface oxygen , 1989 .

[31]  M. Stiles,et al.  On the interplay between chemical reactions and phase transitions for molecules adsorbed on solid surfaces , 1986 .

[32]  Cox,et al.  Spatial self organization of surface structure during an oscillating catalytic reaction. , 1985, Physical review letters.

[33]  G. Ertl.  Catalysis and surface phase transformation , 1985 .

[34]  G. Ertl,et al.  Conditions for the Occurrence of Kinetic Oscillations in the Catalytic Oxidation of CO on a Pt(100) Surface , 1985 .

[35]  G. Ertl,et al.  Surface science lettersNon-equilibrium surface phase transitions during the catalytic oxidation of CO on Pt(100) , 1983 .

[36]  Patricia A. Thiel,et al.  The interaction of CO and Pt(100). I. Mechanism of adsorption and Pt phase transition , 1983 .

[37]  G. Ertl,et al.  The interaction of CO and Pt(100). II. Energetic and kinetic parameters , 1983 .

[38]  B. Sales,et al.  Oscillatory oxidation of CO over Pt, Pd and Ir catalysts: Theory , 1982 .

[39]  E. I. Ko,et al.  The adsorption of CO, O2, and H2 on Pt(100)-(5 × 20) , 1981 .

[40]  Gerhard Ertl,et al.  A molecular beam investigation of the catalytic oxidation of CO on Pd (111) , 1978 .

[41]  Peter Goodhew,et al.  Electron Microscopy And Analysis , 1975 .