Department of Physical Chemistry

Nanostructured Model Catalysts

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Dr. Harald Lorenz

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Theses

Type
Year
Title
Supervisor(s)
PhD
2012
Structural and Catalytic Characterization of Oxide-supported Palladium Model Catalysts in Methanol Steam Reforming
Penner, Simon; Klötzer, Bernhard
Diploma
2008
Strukturelle und katalytische Charakterisierung von reinem In2O3 und Ga2O3 als zukünftige Träger für Pd-Modellkatalysatoren in der Methanol-Dampfreformierung
Penner, Simon; Klötzer, Bernhard

Publications (25)

25.
; ; ; ; ; ; ; Impregnated and Co-precipitated Pd–Ga2O3, Pd–In2O3 and Pd–Ga2O3–In2O3 Catalysts: Influence of the Microstructure on the CO2 Selectivity in Methanol Steam Reforming. Catal. Lett. 148 (10), 3062-3071
24.
; ; ; ; ; ; ; ; ; ; ; ; The catalytic properties of thin film Pd-rich GaPd2 in methanol steam reforming. J. Catal. 309, 231-240
23.
; ; ; ; ZnO is a CO2-selective steam reforming catalyst. J. Catal. 297, 151-154
22.
; ; ; ; ; ; ; ; ; From Oxide-Supported Palladium to Intermetallic Palladium Phases: Consequences for Methanol Steam Reforming. ChemCatChem 5 (6), 1273-1285
21.
; ; ; ; ; ; ; ; ; Methanol steam reforming: CO2-selective Pd2Ga phases supported on α- and γ-Ga2O3. Appl. Catal. A 453, 34-44
20.
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; How to Control the Selectivity of Palladium-based Catalysts in Hydrogenation Reactions: The Role of Subsurface Chemistry. ChemCatChem 4 (8), 1048-1063
19.
; ; ; ; ; ; ; ; ; ; CO2-selective methanol steam reforming on In-doped Pd studied by in situ X-ray photoelectron spectroscopy. J. Catal. 295, 186-194
18.
; ; ; ; ; ; ; ; ; ; ; ; ; In situ XPS study of methanol reforming on PdGa near-surface intermetallic phases. J. Catal. 290, 126-137
17.
; ; ; ; ; ; ; ; ; ; ; ; Hydrogen Production by Methanol Steam Reforming on Copper Boosted by Zinc-Assisted Water Activation. Angew. Chem. Int. Ed. 51 (12), 3002-3006
16.
; ; ; ; ; ; ; ; ; ; ; ; Steigerung der Wasserstoffproduktion in der Methanol-Dampfreformierung auf Kupfer durch Zink-unterstützte Wasseraktivierung. Angew. Chem. 124 (12), 3057-3061
15.
; ; ; ; Water−Gas Shift and Formaldehyde Reforming Activity Determined by Defect Chemistry of Polycrystalline In2O3. J. Phys. Chem. C 115 (14), 6622-6628
14.
; ; ; ; ; ; Hydrogen on In2O3: Reducibility, Bonding, Defect Formation, and Reactivity. J. Phys. Chem. C 114 (19), 9022-9029
13.
; ; ; ; ; ; ; Pd–In2O3 interaction due to reduction in hydrogen: Consequences for methanol steam reforming. Appl. Catal. A 374 (1-2), 180-188
12.
; ; ; ; ; ; ; Preparation and structural characterization of SnO2 and GeO2 methanol steam reforming thin film model catalysts by (HR)TEM. Mat. Chem. Phys. 122 (2-3), 623-629
11.
; ; ; ; ; ; ; ; ; Origin of different deactivation of Pd/SnO2 and Pd/GeO2 catalysts in methanol dehydrogenation and reforming: A comparative study. Appl. Catal. A 381 (1-2), 242-252
10.
; ; ; ; ; ; ; ; ; ; ; ; ; ; Subsurface-Controlled CO2 Selectivity of PdZn Near-Surface Alloys in H2 Generation by Methanol Steam Reforming. Angew. Chem. Int. Ed. 49 (18), 3224-3227
9.
; ; ; ; ; ; ; ; ; ; ; ; ; ; Subsurface-gesteuerte CO2-Selektivität von PdZn-Oberflächenlegierungen in der H2-Erzeugung durch Methanoldampfreformierung. Angew. Chem. 122 (18), 3292-3296
8.
; ; ; ; ; ; ; ; ; Steam reforming of methanol on PdZn near-surface alloys on Pd(111) and Pd foil studied by in-situ XPS, LEIS and PM-IRAS. J. Catal. 276 (1), 101-113
7.
; ; ; ; ; ; ; ; ; ; ; ; ; ; Temperature-Induced Modifications of PdZn Layers on Pd(111). J. Phys. Chem. C 114 (24), 10850-10856
6.
; ; ; ; ; ; ; ; Catalytic characterization of pure SnO2 and GeO2 in methanol steam reforming. Appl. Catal. A 375 (2), 188-195
5.
; ; ; ; Pd/Ga2O3 methanol steam reforming catalysts: Part II. Catalytic selectivity. Appl. Catal. A 358 (2), 203-210
4.
; ; ; ; ; ; Pd/Ga2O3 methanol steam reforming catalysts: Part I. Morphology, composition and structural aspects. Appl. Catal. A 358 (2), 193-202
3.
; ; ; ; ; ; ; Dendritic growth of amorphous gallium oxide in mixed GaOx/WOx thin films. Mat. Chem. Phys. 116 (1), 175-182
2.
; ; ; ; ; ; Novel methanol steam reforming activity and selectivity of pure In2O3. Appl. Catal. A 347 (1), 34-42
1.
; ; ; ; ; ; A New Preparation Pathway to Well-Defined In2O3 Nanoparticles at Low Substrate Temperatures. J. Phys. Chem. C 112 (4), 918-925

* These authors contributed equally to the respective publication.

# This author was the corresponding author.

Talks (38)

Talks (1)

1.
Pd-In2O3 interaction due to reduction in hydrogen: consequences for methanol steam reforming
Lorenz, H.; Penner, S.; Turner, S.; Lebedev, O.; Klötzer, B.
43. Jahrestreffen Deutscher Katalytiker, Weimar, Germany
10.03.201012.03.2010

Contributed Talks (26)

26.
From Pure Oxides to Mixed Oxides: Model Systems for Structural and Catalytic Studies
Penner, S.; Lorenz, H.
3rd International Conference Nanomaterials: Applications and Properties, Alushta, Crimea
16.09.2013
25.
Water-activating sites in methanol steam reforming studied by in-situ XPS
Klötzer, B.; Rameshan, C.; Lorenz, H.; Penner, S.; Knop-Gericke, A.; Schlögl, R.
11th Pannonian International Symposium on Catalysis, Universitätszentrum Obergurgl, Austria
03.09.201207.09.2012
24.
Water-activating sites in methanol steam reforming studied by in-situ XPS
Klötzer, B.; Rameshan, C.; Lorenz, H.; Penner, S.; Knop-Gericke, A.; Schlögl, R.
ICC Satellite Workshop "In situ Spectroscopy and Model Catalysis", Kloster Andechs
07.07.2012
23.
Formaldehyde Conversion over Pd-based catalysts supporting oxides
Penner, S.; Lorenz, H.; Klötzer, B.; Bielz, T.; Rameshan, C.
13th Palladium Day, Obergurgl, Tirol, Austria
04.10.2011
22.
Water-gas shift- and formaldehyde reforming activity determined by defect chemistry of polycrystalline In2O3
Penner, S.; Bielz, T.; Lorenz, H.; Amann, P.; Klötzer, B.
14th Austrian Chemistry Days, Linz, Austria
26.09.201129.09.2011
21.
Bridging the gap between supported CuZn and inverse CuZn and PdZn catalysts by in-situ spectroscopy
Rameshan, C.; Lorenz, H.; Penner, S.; Friedrich, M.; Armbrüster, M.; Klötzer, B.
12th Pd-Day, FHI Berlin, Germany
21.03.201122.03.2011
20.
Subsurface-controlled CO2 selectivity of PdZn near-surface alloys in H2 generation by methanol steam reforming
Rameshan, C.; Lorenz, H.; Klauser, F.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
11th Vacuum Congress, Salamanca, Spain
20.09.201024.09.2010
19.
PdxZny and PdxGay: news from surface termination and chemistry
Rameshan, C.; Lorenz, H.; Penner, S.; Friedrich, M.; Armbrüster, M.; Knop-Gericke, A.; Stadlmayr, W.; Memmel, N.; Klötzer, B.
11th Pd-Day, Griesalp, Switzerland
13.09.201014.09.2010
18.
Subsurface-controlled CO2 selectivity of PdZn near-surface alloys in H2 generation by methanol steam reforming
Rameshan, C.; Lorenz, H.; Klauser, F.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
3rd EuCheMS Chemistry Congress, Nürnberg, Germany
29.08.201002.09.2010
17.
Comparing Zn on Pd(111) with Ga on Pd(111) - An ICISS study
Stadlmayr, W.; Rameshan, C.; Lorenz, H.; Penner, S.; Memmel, N.; Klötzer, B.
27th European Conference on Surface Science (ECOSS 27), Groningen, Netherlands
29.08.201002.09.2010
16.
Methanol Steam Reforming of Pd-based catalysts in a continuous flow reactor
Rameshan, C.; Lorenz, H.; Penner, S.; Friedrich, M.; Armbrüster, M.; Klötzer, B.
10th Pd-Day, FHI Berlin, Germany
18.05.201019.05.2010
15.
Structural and catalytic studies on Germanium Oxide- and Tin-oxide-supported Pd particles
Rameshan, C.; Lorenz, H.; Penner, S.; Zhao, Q.; Turner, S.; Lebedev, O.; Klötzer, B.
10th Pd-Day, FHI Berlin, Germany
18.05.201019.05.2010
14.
SnO2 and GeO2 methanol steam reforming catalysts: Characterization by (HR)TEM and catalytic studies
Penner, S.; Lorenz, H.; Klötzer, B.; Turner, S.; Lebedev, O.
9th Palladium Day, Vienna, Austria
19.10.200920.10.2009
13.
From Oxide-supported Palladium to Pd Intermetallic Phases: Consequences for Methanol Steam Reforming
Penner, S.; Lorenz, H.; Jochum, W.; Klötzer, B.; Rameshan, C.; Stöger-Pollach, M.
European Congress on Advanced Materials, Glasgow, Scotland
07.09.200910.09.2009
12.
Structure-activity correlations in oxide-supported Pd methanol steam reforming catalysts
Penner, S.; Lorenz, H.; Jochum, W.; Klötzer, B.; Rameshan, C.; Stöger-Pollach, M.
13th Austrian Chemistry Days, Vienna, Austria
24.08.200927.08.2009
11.
Structure-activity correlations in Pd/Ga2O3 methanol steam reforming catalysts
Penner, S.; Lorenz, H.; Jochum, W.; Stöger-Pollach, M.; Wang, D.; Schlögl, R.; Klötzer, B.
6th World Congress on Oxidation Catalysis, Lille, France
05.07.200910.07.2009
10.
Structure-activity correlations in oxide-supported Pd methanol steam reforming catalysts
Penner, S.; Lorenz, H.; Jochum, W.; Klötzer, B.
108. Bunsentagung für Physikalische Chemie 2009, Köln, Germany
21.05.200923.05.2009
9.
Structure-activity correlations in oxide-supported Pd a methanol steam reforming catalysts
Penner, S.; Lorenz, H.; Klötzer, B.; Stöger-Pollach, M.; Wang, D.; Rameshan, C.
2. GÖCh-Symposium für Physikalische Chemie, Innsbruck, Austria
23.02.200924.02.2009
8.
Structure and catalytic performance of Ga2O3 and Pd/Ga2O3 methanol steam reforming catalysts
Penner, S.; Lorenz, H.; Klötzer, B.
7th Palladium Day, Bad Dreikirchen
29.09.2008
7.
PdZn and PdGa surfaces: preparation, characterization, stability and MSR performance
Rameshan, C.; Lorenz, H.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
7th Pd-Day, Bad Dreikirchen, Italy
28.09.200829.09.2008
6.
PdZn and PdGa surfaces: Surface Structure and MSR performance
Rameshan, C.; Lorenz, H.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
8th Pd-Day, FHI Berlin, Germany
28.09.200829.09.2008
5.
MSR and OSR on Pd, Cu, PdZn, PdGa and CuZn: comparative studies
Rameshan, C.; Lorenz, H.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
8th Pd-Day, FHI Berlin, Germany
28.09.200829.09.2008
4.
Pd catalysts in methanol steam reforming
Rameshan, C.; Lorenz, H.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
9th Pannonian International Symposium on Catalysis, Strbske Pleso, Slovakia
08.09.200812.09.2008
3.
Nanostructured Pd-Zn surfaces as model catalysts for methanol steam reforming
Rameshan, C.; Lorenz, H.; Klauser, F.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
14th International Congress on Catalysis, Seoul, South Korea
13.07.200818.07.2008
2.
Pd/Zn bimetallic surfaces as model systems for methanol steam reforming
Rameshan, C.; Lorenz, H.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
6th Pd-Day, FHI Berlin, Germany
11.02.2007
1.
Characterization of Zn-Pd and ZnO-Pd model catalysts for methanol steam reforming
Rameshan, C.; Lorenz, H.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Hävecker, M.; Teschner, D.; Schlögl, R.; Klötzer, B.
5th Pd-Day, FHI Berlin, Germany
06.02.2007

Poster Presentations (11)

11.
Hydrogen production via methanol reforming over oxides and oxide–supported Pd intermetallics
Penner, S.; Lorenz, H.; Bielz, T.; Klötzer, B.
7th International Conference on Environmental Catalysis, Lyon, France
02.09.201206.09.2012
10.
Water-gas-shift and formaldehyde reforming activity determined by defect chemistry of polycrystalline In2O3
Bielz, T.; Lorenz, H.; Amann, P.; Klötzer, B.; Penner, S.
15th International Congress on Catalysis, Munich, Germany
06.07.201211.07.2012
9.
Everything counts: The role of the supporting oxides in the methanol steam reforming reaction over supported Pd-based intermetallics
Lorenz, H.; Penner, S.; Klötzer, B.; Bielz, T.
15th International Conference on Catalysis, Munich, Germany
06.07.201211.07.2012
8.
Structural and compositional tuning of oxide thin film catalysts via thermal deposition under HV
Lorenz, H.; Penner, S.; Klötzer, B.; Stöger-Pollach, M.
18th International Vacuum Congress, Beijing, China
23.08.201027.08.2010
7.
From Ga2O3 and In2O3-supported Palladium to Pd Intermetallic Phases: Consequences for Methanol Steam Reforming
Penner, S.; Lorenz, H.; Klötzer, B.; Jochum, W.; Stöger-Pollach, M.; Turner, S.; Lebedev, O.
9th European Congress on Catalysis (EUROPACAT-9), Salamanca, Spain
30.08.200904.09.2009
6.
Electron-microscopic characterization of pure oxide methanol steam reforming catalysts
Penner, S.; Lorenz, H.; Klötzer, B.; Jochum, W.; Stöger-Pollach, M.; Turner, S.; Lebedev, O.
9th Multinational Conference on Microscopy 2009 and Dreiländertagung 2009, Graz, Austria
30.08.200904.09.2009
5.
Near surface PdZn alloys studied by LEIS, AES, AFM and in-situ XPS under methanol steam reforming conditions
Rameshan, C.; Lorenz, H.; Klauser, F.; Penner, S.; Zemlyanov, D.; Knop-Gericke, A.; Klötzer, B.
2. Göch-Symposium für Physikalische Chemie, Innsbruck, Austria
23.02.200924.02.2009
4.
Novel Methanol Steam Reforming activity of pure In2O3 catalysts
Lorenz, H.; Penner, S.; Klötzer, B.; Stöger-Pollach, M.
14th International Congress on Catalysis, Seoul, South Korea
13.07.200818.07.2008
3.
Preparation, structural and catalytic characterization of pure Ga2O3 and mixed Ga2O3/WO3 thin films as model systems for catalysis
Penner, S.; Lorenz, H.; Klötzer, B.; Klauser, F.; Liu, X.; Bertel, E.; Stöger-Pollach, M.
14th International Congress on Catalysis, Seoul, South Korea
13.07.200818.07.2008
2.
Model Catalyst Studies on highly H2/CO2-selective bimetallic Pd Methanol Steam Reforming (MSR) Catalysts
Klötzer, B.; Penner, S.; Jochum, W.; Lorenz, H.; Rameshan, C.; Schlögl, R.
ESF-FWF Conference "Nanotechnology for sustainable energy", Obergurgl, Austria
14.06.200819.06.2008
1.
Reaction Control on Nanostructured Model Catalysts
Klötzer, B.; Penner, S.; Jochum, W.; Lorenz, H.; Rameshan, C.
1. Göch-Symposium für Physikalische Chemie, Vienna, Austria
19.10.200720.10.2007