Electron Microscopy of Thin-Film Model Catalysts: Activation of Alumina-Supported Rhodium Nanoparticles

1998 ◽  
Vol 173 (2) ◽  
pp. 409-422 ◽  
Author(s):  
G. Rupprechter ◽  
K. Hayek ◽  
H. Hofmeister
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Model Catalysts ◽  
Rhodium Nanoparticles ◽  
Film Model ◽  
Thin Film Model

scholarly journals Nanostructured, mesoporous Au/TiO2 model catalysts – structure, stability and catalytic properties

2011 ◽  
Vol 2 ◽  
pp. 593-606 ◽  
Author(s):  
Matthias Roos ◽  
Dominique Böcking ◽  
Kwabena Offeh Gyimah ◽  
Gabriela Kucerova ◽  
Joachim Bansmann ◽  
...  
Keyword(s):  
Thin Film ◽  
Photoelectron Spectroscopy ◽  
Catalytic Properties ◽  
Model Catalysts ◽  
Model Systems ◽  
Structure Stability ◽  
Titanium Tetraisopropoxide ◽  
X Ray ◽  
Film Model ◽  
Thin Film Model

Aiming at model systems with close-to-realistic transport properties, we have prepared and studied planar Au/TiO2 thin-film model catalysts consisting of a thin mesoporous TiO2 film of 200–400 nm thickness with Au nanoparticles, with a mean particle size of ~2 nm diameter, homogeneously distributed therein. The systems were prepared by spin-coating of a mesoporous TiO2 film from solutions of ethanolic titanium tetraisopropoxide and Pluronic P123 on planar Si(100) substrates, calcination at 350 °C and subsequent Au loading by a deposition–precipitation procedure, followed by a final calcination step for catalyst activation. The structural and chemical properties of these model systems were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption, inductively coupled plasma ionization spectroscopy (ICP–OES) and X-ray photoelectron spectroscopy (XPS). The catalytic properties were evaluated through the oxidation of CO as a test reaction, and reactivities were measured directly above the film with a scanning mass spectrometer. We can demonstrate that the thin-film model catalysts closely resemble dispersed Au/TiO2 supported catalysts in their characteristic structural and catalytic properties, and hence can be considered as suitable for catalytic model studies. The linear increase of the catalytic activity with film thickness indicates that transport limitations inside the Au/TiO2 film catalyst are negligible, i.e., below the detection limit.

scholarly journals Pt/ceria thin film model catalysts after high-temperature reduction: a (HR)TEM study

Vacuum ◽  
2003 ◽  
Vol 71 (1-2) ◽  
pp. 71-76 ◽  
Author(s):  
S. Penner ◽  
G. Rupprechter ◽  
H. Sauer ◽  
D.S. Su ◽  
R. Tessadri ◽  
...  
Keyword(s):  
Thin Film ◽  
High Temperature ◽  
Model Catalysts ◽  
Film Model ◽  
Temperature Reduction ◽  
Thin Film Model

scholarly journals Structure–activity correlations in thin film model catalysts: CO hydrogenation on Rh/VOx

2006 ◽  
Vol 308 ◽  
pp. 31-42 ◽  
Author(s):  
Simon Penner ◽  
Bernd Jenewein ◽  
Di Wang ◽  
Robert Schlögl ◽  
Konrad Hayek
Keyword(s):  
Thin Film ◽  
Co Hydrogenation ◽  
Model Catalysts ◽  
Film Model ◽  
Structure Activity ◽  
Thin Film Model

scholarly journals Preparation and structural characterization of SnO2 and GeO2 methanol steam reforming thin film model catalysts by (HR)TEM

2010 ◽  
Vol 122 (2-3) ◽  
pp. 623-629 ◽  
Author(s):  
Harald Lorenz ◽  
Qian Zhao ◽  
Stuart Turner ◽  
Oleg I. Lebedev ◽  
Gustaaf Van Tendeloo ◽  
...  
Keyword(s):  
Thin Film ◽  
Structural Characterization ◽  
Steam Reforming ◽  
Model Catalysts ◽  
Methanol Steam Reforming ◽  
Film Model ◽  
Thin Film Model

Structure–Activity Correlations on Rh/Al2O3 and Rh/TiO2 Thin Film Model Catalysts after Oxidation and Reduction

1999 ◽  
Vol 186 (1) ◽  
pp. 201-213 ◽  
Author(s):  
Günther Rupprechter ◽  
Gernot Seeber ◽  
Hans Goller ◽  
Konrad Hayek
Keyword(s):  
Thin Film ◽  
Tio2 Thin Film ◽  
Model Catalysts ◽  
Film Model ◽  
Structure Activity ◽  
Thin Film Model

Carbon monoxide methanation over nickel/alumina thin-film model catalysts

1985 ◽  
Vol 150 (2) ◽  
pp. A49
Author(s):  
Scott D. Bischke ◽  
D.Wayne Goodman ◽  
John L. Falconer
Keyword(s):  
Thin Film ◽  
Carbon Monoxide ◽  
Model Catalysts ◽  
Film Model ◽  
Thin Film Model ◽  
Alumina Thin Film

Carbon monoxide methanation over nickel/alumina thin-film model catalysts

1985 ◽  
Vol 150 (2) ◽  
pp. 351-357 ◽  
Author(s):  
Scott D. Bischke ◽  
D.Wayne Goodman ◽  
John L. Falconer
Keyword(s):  
Thin Film ◽  
Carbon Monoxide ◽  
Model Catalysts ◽  
Film Model ◽  
Thin Film Model ◽  
Alumina Thin Film

Surface Reactivity of Pd Nanoparticles Supported on Polycrystalline Substrates As Compared to Thin Film Model Catalysts:  Infrared Study of CO Adsorption

2004 ◽  
Vol 108 (11) ◽  
pp. 3603-3613 ◽  
Author(s):  
Serena Bertarione ◽  
Domenica Scarano ◽  
Adriano Zecchina ◽  
Viktor Johánek ◽  
Jens Hoffmann ◽  
...  
Keyword(s):  
Thin Film ◽  
Co Adsorption ◽  
Pd Nanoparticles ◽  
Surface Reactivity ◽  
Model Catalysts ◽  
Infrared Study ◽  
Film Model ◽  
Thin Film Model
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