Search Results - "Rameshan, Raffael"

Support effect on the reactivity and stability of Au25(SR)18 and Au144(SR)60 nanoclusters in liquid phase cyclohexane oxidation by García, Clara, Pollitt, Stephan, van der Linden, Marte, Truttmann, Vera, Rameshan, Christoph, Rameshan, Raffael, Pittenauer, Ernst, Allmaier, Günter, Kregsamer, Peter, Stöger-Pollach, Michael, Barrabés, Noelia, Rupprechter, Günther

“…[Display omitted] •Under pretreatment, supported Au144 cluster structure is more stable than Au25.•Clear cluster size/structure and support effect on the…”
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Role of Precursor Carbides for Graphene Growth on Ni(111) by Rameshan, Raffael, Vonk, Vedran, Franz, Dirk, Drnec, Jakub, Penner, Simon, Garhofer, Andreas, Mittendorfer, Florian, Stierle, Andreas, Klötzer, Bernhard

“…Surface X-ray Diffraction was used to study the transformation of a carbon-supersaturated carbidic precursor toward a complete single layer of graphene in the…”
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Modifying the Surface Structure of Perovskite-Based Catalysts by Nanoparticle Exsolution by Lorenz Lindenthal, Raffael Rameshan, Harald Summerer, Thomas Ruh, Janko Popovic, Andreas Nenning, Stefan Löffler, Alexander Karl Opitz, Peter Blaha, Christoph Rameshan

“…In heterogeneous catalysis, surfaces decorated with uniformly dispersed, catalytically-active (nano)particles are a key requirement for excellent performance…”
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In Situ Growth of Exsolved Nanoparticles under Varying rWGS Reaction Conditions—A Catalysis and Near Ambient Pressure-XPS Study by Lorenz Lindenthal, Joel Huber, Hedda Drexler, Thomas Ruh, Raffael Rameshan, Florian Schrenk, Stefan Löffler, Christoph Rameshan

“…Perovskite-type oxides are highly flexible materials that show properties that are beneficial for application in reverse water-gas shift processes (rWGS). Due…”
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High Temperature Water Gas Shift Reactivity of Novel Perovskite Catalysts by Janko Popovic, Lorenz Lindenthal, Raffael Rameshan, Thomas Ruh, Andreas Nenning, Stefan Löffler, Alexander Karl Opitz, Christoph Rameshan

“…High temperature water-gas shift (HT-WGS) is an industrially highly relevant reaction. Moreover, climate change and the resulting necessary search for…”
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Novel Sample-Stage for Combined Near Ambient Pressure X-ray Photoelectron Spectroscopy, Catalytic Characterization and Electrochemical Impedance Spectroscopy by Rameshan, Raffael, Nenning, Andreas, Raschhofer, Johannes, Lindenthal, Lorenz, Ruh, Thomas, Summerer, Harald, Opitz, Alexander, Martin Huber, Tobias, Rameshan, Christoph

“…For an in-depth characterization of catalytic materials and their properties, spectroscopic in-situ (operando) investigations are indispensable. With the rapid…”
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Enhancing Electrochemical Water-Splitting Kinetics by Polarization-Driven Formation of Near-Surface Iron(0): An In Situ XPS Study on Perovskite-Type Electrodes by Opitz, Alexander K., Nenning, Andreas, Rameshan, Christoph, Rameshan, Raffael, Blume, Raoul, Hävecker, Michael, Knop-Gericke, Axel, Rupprechter, Günther, Fleig, Jürgen, Klötzer, Bernhard

“…In the search for optimized cathode materials for high‐temperature electrolysis, mixed conducting oxides are highly promising candidates. This study deals with…”
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Operando Insights into CO Oxidation on Cobalt Oxide Catalysts by NAP-XPS, FTIR, and XRD by Lukashuk, Liliana, Yigit, Nevzat, Rameshan, Raffael, Kolar, Elisabeth, Teschner, Detre, Hävecker, Michael, Knop-Gericke, Axel, Schlögl, Robert, Föttinger, Karin, Rupprechter, Günther

“…Cobalt oxide Co3O4 has recently emerged as promising, noble metal-free catalyst for oxidation reactions but a better understanding of the active catalyst under…”
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Absorbance-based Spectroelectrochemical Sensor for Determination of Ampyra Based on Electrochemical Preconcentration by Ghoorchian, Arash, Afkhami, Abbas, Madrakian, Tayyebeh, Rameshan, Raffael, Rameshan, Christoph, Hajian, Ali

“…[Display omitted] •Ampyra can be selectively electropolymerized.•A colored film on the surface of FTO/AgNPs as an optically transparent electrode.•The…”
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Cu-doped perovskite-type oxides: A structural deep dive and examination of their exsolution behaviour influenced by B-site doping by Berger, Tobias, Drexler, Hedda, Ruh, Thomas, Lindenthal, Lorenz, Schrenk, Florian, Bock, Johannes, Rameshan, Raffael, Föttinger, Karin, Irrgeher, Johanna, Rameshan, Christoph

“…Perovskite-type oxides have gained significant attention in the scientific community due to their unique properties and potential applications. Their ability…”
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Enhancing Electrochemical Water-Splitting Kinetics by Polarization-Driven Formation of Near-Surface Iron(0): An In Situ XPS Study on Perovskite-Type Electrodes by Opitz, Alexander K., Nenning, Andreas, Rameshan, Christoph, Rameshan, Raffael, Blume, Raoul, Hävecker, Michael, Knop-Gericke, Axel, Rupprechter, Günther, Fleig, Jürgen, Klötzer, Bernhard

“…In the search for optimized cathode materials for high‐temperature electrolysis, mixed conducting oxides are highly promising candidates. This study deals with…”
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Ambient Pressure XPS Study of Mixed Conducting Perovskite-Type SOFC Cathode and Anode Materials under Well-Defined Electrochemical Polarization by Nenning, Andreas, Opitz, Alexander K., Rameshan, Christoph, Rameshan, Raffael, Blume, Raoul, Hävecker, Michael, Knop-Gericke, Axel, Rupprechter, Günther, Klötzer, Bernhard, Fleig, Jürgen

“…The oxygen exchange activity of mixed conducting oxide surfaces has been widely investigated, but a detailed understanding of the corresponding reaction…”
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Operando probing of the surface chemistry during the Haber–Bosch process by Goodwin, Christopher M., Lömker, Patrick, Degerman, David, Davies, Bernadette, Shipilin, Mikhail, Garcia-Martinez, Fernando, Koroidov, Sergey, Katja Mathiesen, Jette, Rameshan, Raffael, Rodrigues, Gabriel L. S., Schlueter, Christoph, Amann, Peter, Nilsson, Anders

“…The large-scale conversion of N 2 and H 2 into NH 3 (refs.  1 , 2 ) over Fe and Ru catalysts 3 for fertilizer production occurs through the Haber–Bosch…”
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Structural modification of perovskites by tailored exsolution for enhanced catalytic activity by Rameshan, Raffael, Rameshan, Christoph, Ruh, Thomas, Nenning, Andreas, Opitz, Alexander

“…Abstract only…”
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Structural and kinetic aspects of CO oxidation on ZnOx-modified Cu surfaces by Bikaljevic, Djuro, Rameshan, Raffael, Köpfle, Norbert, Götsch, Thomas, Mühlegger, Eva, Schlögl, Robert, Penner, Simon, Memmel, Norbert, Klötzer, Bernhard

“…[Display omitted] •Temporarily enhanced CO-oxidation reaction observed at Cu0/ZnO interface.•Mechanistic explanation of temporary nature.•Cu0/ZnO interface…”
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How reduction temperature influences the structure of perovskite-oxide catalysts during the dry reforming of methane by Schrenk, Florian, Lindenthal, Lorenz, Drexler, Hedda, Berger, Tobias, Rameshan, Raffael, Ruh, Thomas, Föttinger, Karin, Rameshan, Christoph

“…Dry reforming of methane is a promising reaction to convert CO and combat climate change. However, the reaction is still not feasible in large-scale industrial…”
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Tailored exsolution of metal nanoparticles: structural and chemical characterisation of doped perovskites by XPS and XRD by Raschhofer, Johannes, Lindenthal, Lorenz, Popovic, Janko, Ruh, Thomas, Rameshan, Raffael, Nenning, Andreas, Opitz, Alexander, Rameshan, Christoph

“…Abstract only…”
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Ca‐doped rare earth perovskite materials for tailored exsolution of metal nanoparticles by Lindenthal, Lorenz, Ruh, Thomas, Rameshan, Raffael, Summerer, Harald, Nenning, Andreas, Herzig, Christopher, Löffler, Stefan, Limbeck, Andreas, Opitz, Alexander Karl, Blaha, Peter, Rameshan, Christoph

“…Perovskite‐type oxide materials (nominal composition ABO3) are a very versatile class of materials, and their properties are tuneable by varying and doping A‐…”
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Perovskite-Type Oxide Catalysts in CO2 Utilization: A Principal Study of Novel Cu-Doped Perovskites for Methanol Synthesis by Schrenk, Florian, Lindenthal, Lorenz, Pacholik, Gernot, Navratil, Tina, Berger, Tobias Maximilian, Drexler, Hedda, Rameshan, Raffael, Ruh, Thomas, Föttinger, Karin, Rameshan, Christoph

“…Six different perovskite-type oxides were investigated with respect to their ability for methanol synthesis via H2 and CO2: Fe-, Mn-, and Ti-based perovskites…”
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Near-Ambient-Pressure X‑ray Photoelectron Spectroscopy Study of Methane-Induced Carbon Deposition on Clean and Copper-Modified Polycrystalline Nickel Materials by Rameshan, Raffael, Mayr, Lukas, Klötzer, Bernhard, Eder, Dominik, Knop-Gericke, Axel, Hävecker, Michael, Blume, Raoul, Schlögl, Robert, Zemlyanov, Dmitry Y, Penner, Simon

“…In order to simulate solid-oxide fuel cell (SOFC)-related coking mechanisms of Ni, methane-induced surface carbide and carbon growth was studied under…”
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