Department of Physical Chemistry

Nanostructured Model Catalysts

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Dr. Christoph Rameshan

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Theses

Type
Year
Title
Supervisor(s)
PhD
2011
CuZn, PdGa und PdZn Modellkatalysatoren
Klötzer, Bernhard; Penner, Simon
Diploma
2008
Nanostrukturierte Pd-Zn Oberflächen als Modellkatalysatoren für die Methanol-Dampfreformierung
Klötzer, Bernhard; Penner, Simon

Publications (23)

23.
; ; ; ; ; ; ; ; ; ; ; The Chemical Evolution of the La0.6Sr0.4CoO3−δ Surface Under SOFC Operating Conditions and Its Implications for Electrochemical Oxygen Exchange Activity. Top. Catal. ,
22.
; ; ; ; ; ; ; 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
21.
; ; ; ; ; ; ; ; ; ; Surface Chemistry of Perovskite-Type Electrodes During High Temperature CO2 Electrolysis Investigated by Operando Photoelectron Spectroscopy. ACS Appl. Mater. Interfaces 9 (41), 35847-35860
20.
; ; ; ; ; ; ; ; ; Ambient Pressure XPS Study of Mixed Conducting Perovskite-Type SOFC Cathode and Anode Materials under Well-Defined Electrochemical Polarization. J. Phys. Chem. C 120 (3), 1461-1471
19.
; ; ; ; ; ; ; ; ; ; Water Splitting on Model-Composite La0.6Sr0.4FeO3-d (LSF) Electrodes in H2/H2O Atmosphere. ECS Trans. 68 (1), 3333-3343
18.
; ; ; ; ; ; ; ; ; Enhancing Electrochemical Water-Splitting Kinetics by Polarization-Driven Formation of Near-Surface Iron(0): An In Situ XPS Study on Perovskite-Type Electrodes. Angew. Chem. 127 (9), 2666-2670
17.
; ; ; ; Combined UHV/high-pressure catalysis setup for depth-resolved near-surface spectroscopic characterization and catalytic testing of model catalysts. Rev. Sci. Instrum. 85 (5), 055104
16.
; ; ; ; ; ; ; ; ; From Oxide-Supported Palladium to Intermetallic Palladium Phases: Consequences for Methanol Steam Reforming. ChemCatChem 5 (6), 1273-1285
15.
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; How to Control the Selectivity of Palladium-based Catalysts in Hydrogenation Reactions: The Role of Subsurface Chemistry. ChemCatChem 4 (8), 1048-1063
14.
; ; ; ; ; ; ; ; ; ; CO2-selective methanol steam reforming on In-doped Pd studied by in situ X-ray photoelectron spectroscopy. J. Catal. 295, 186-194
13.
; ; ; ; ; ; ; ; ; ; ; ; ; In situ XPS study of methanol reforming on PdGa near-surface intermetallic phases. J. Catal. 290, 126-137
12.
; ; ; ; ; ; ; ; ; ; ; ; Hydrogen Production by Methanol Steam Reforming on Copper Boosted by Zinc-Assisted Water Activation. Angew. Chem. Int. Ed. 51 (12), 3002-3006
11.
; ; ; ; ; ; ; ; ; ; ; ; Steigerung der Wasserstoffproduktion in der Methanol-Dampfreformierung auf Kupfer durch Zink-unterstützte Wasseraktivierung. Angew. Chem. 124 (12), 3057-3061
10.
; ; ; ; ; ; ; Pd–In2O3 interaction due to reduction in hydrogen: Consequences for methanol steam reforming. Appl. Catal. A 374 (1-2), 180-188
9.
; ; ; ; ; ; ; 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
8.
; ; ; ; ; ; ; ; ; 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
7.
; ; ; ; ; ; ; ; ; ; ; ; ; ; Subsurface-Controlled CO2 Selectivity of PdZn Near-Surface Alloys in H2 Generation by Methanol Steam Reforming. Angew. Chem. Int. Ed. 49 (18), 3224-3227
6.
; ; ; ; ; ; ; ; ; ; ; ; ; ; Subsurface-gesteuerte CO2-Selektivität von PdZn-Oberflächenlegierungen in der H2-Erzeugung durch Methanoldampfreformierung. Angew. Chem. 122 (18), 3292-3296
5.
; ; ; ; ; ; ; ; ; 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
4.
; ; ; ; ; ; ; ; ; ; ; ; ; ; Temperature-Induced Modifications of PdZn Layers on Pd(111). J. Phys. Chem. C 114 (24), 10850-10856
3.
; ; ; ; ; ; ; ; Catalytic characterization of pure SnO2 and GeO2 in methanol steam reforming. Appl. Catal. A 375 (2), 188-195
2.
; ; ; ; Pd/Ga2O3 methanol steam reforming catalysts: Part II. Catalytic selectivity. Appl. Catal. A 358 (2), 203-210
1.
; ; ; ; ; ; Pd/Ga2O3 methanol steam reforming catalysts: Part I. Morphology, composition and structural aspects. Appl. Catal. A 358 (2), 193-202

* These authors contributed equally to the respective publication.

# This author was the corresponding author.

Talks (26)

Talks (13)

13.
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
12.
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
11.
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
10.
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
9.
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
8.
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
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

Contributed Talks (8)

8.
Mechanistic Insight into High Temperature CO2 Electrolysis on Mixed Conducting Perovskite-Type Electrodes Revealed By in-Operando Photoelectron Spectroscopy
Nenning, A.; Opitz, A.; Rameshan, C.; Kubicek, M.; Götsch, T.; Blume, R.; Knop-Gericke, A.; Rupprechter, G.; Klötzer, B.; Fleig, J.
232nd ECS Meeting, National Harbor, MD, USA
01.10.201705.10.2017
7.
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
6.
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
5.
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
4.
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
3.
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
2.
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
1.
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

Poster Presentations (5)

5.
In-situ characterization of MSR-model catalysts
Stadlmayr, W.; Rameshan, C.; Penner, S.; Klötzer, B.; Memmel, N.
International workshop "In-situ characterization of near surface processes", Eisenerz, Austria
30.05.201003.06.2010
4.
Temperature-induced modifications of PdZn surface alloys on Pd(111) and first results for Ga on Pd(111)
Stadlmayr, W.; Rameshan, C.; Penner, S.; Klötzer, B.; Memmel, N.
DPG Frühjahrstagung 2010, Kondensierte Materie, Regensburg, Germany
21.03.201026.03.2010
3.
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
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

Awards

1.
Dr.-Otto-Seibert-Wissenschaftsförderungspreis 2011
Rameshan, C.
University of Innsbruck