Search Results - "Wootsch, A"

Preferential CO oxidation in hydrogen (PROX) on ceria-supported catalysts, Part I: Oxidation state and surface species on Pt/CeO2 under reaction conditions by POZDNYAKOVA, O, TESCHNER, D, SCHLÖGL, R, WOOTSCH, A, KRÖHNERT, J, STEINHAUER, B, SAUER, H, TOTH, L, JENTOFT, F. C, KNOP-GERICKE, A, PAA, Z

“…The CO content of hydrogen feed to proton-exchange membrane fuel cells (PEMFCs) must be kept under 1-100 ppm for their proper operation. This can be achieved…”
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Preferential oxidation of carbon monoxide in the presence of hydrogen (PROX) over ceria–zirconia and alumina-supported Pt catalysts by Wootsch, Attila, Descorme, Claude, Duprez, Daniel

“…One crucial requirement for the operation of proton exchange membrane fuel cells (PEMFC) is to feed carbon monoxide free hydrogen to the anode. This need can…”
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Preferential CO oxidation in hydrogen (PROX) on ceria-supported catalysts, Part II: Oxidation states and surface species on Pd/CeO2 under reaction conditions, suggested reaction mechanism by POZDNYAKOVA, O, TESCHNER, D, SCHLÖGL, R, WOOTSCH, A, KRÖHNERT, J, STEINHAUER, B, SAUER, H, TOTH, L, JENTOFT, F. C, KNOP-GERICKE, A, PAAL, Z

“…The aim of the PROX reaction is to reduce the CO content of hydrogen feed to proton-exchange membrane fuel cells (PEMFCs) by selective oxidation of CO in the…”
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Preferential CO oxidation in hydrogen (PROX) on unsupported PtSn catalyst by Teschner, D., Wootsch, A., Paál, Z.

“…[Display omitted] ► Unsupported PtSn was more active catalyst in PROX than Pt black. ► Pretreatment by H 2 and by O 2–H 2 increased activity. ► PROX activity…”
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Structural properties of an unsupported model Pt–Sn catalyst and its catalytic properties in cyclohexene transformation by Paál, Z., Wootsch, A., Teschner, D., Lázár, K., Sajó, I.E., Győrffy, N., Weinberg, G., Knop-Gericke, A., Schlögl, R.

“…Unsupported PtSn powder was prepared by direct reduction of a solution containing both H 2PtCl 6 and SnCl 4 using hydrazine as the reducing agent. The dark…”
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Partial pressure dependent in situ spectroscopic study on the preferential CO oxidation in hydrogen (PROX) over Pt/ceria catalysts by Teschner, D., Wootsch, A., Pozdnyakova-Tellinger, O., Kröhnert, J., Vass, E.M., Hävecker, M., Zafeiratos, S., Schnörch, P., Jentoft, P.C., Knop-Gericke, A., Schlögl, R.

“…Platinum supported on ceria can oxidize CO in excess hydrogen selectively (PROX process). In situ DRIFTS and high-pressure ( ∼ 1   mbar ) XPS experiments were…”
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Preparation, physical characterization and catalytic properties of unsupported Pt–Rh catalyst by Paál, Z., Győrffy, N., Wootsch, A., Tóth, L., Bakos, I., Szabó, S., Wild, U., Schlögl, R.

“…Rh was deposited on a parent platinum black catalyst by an underpotential deposition method. Mean particle size and bulk composition of this Rh–Pt sample was…”
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Bridging the pressure and materials gap: in-depth characterisation and reaction studies of silver-catalysed acrolein hydrogenation by Bron, M., Teschner, D., Knop-Gericke, A., Steinhauer, B., Scheybal, A., Hävecker, M., Wang, D., Födisch, R., Hönicke, D., Wootsch, A., Schlögl, R., Claus, P.

“…The gas-phase hydrogenation of acrolein over silver was studied in a broad pressure range from ∼2 mbar to 20 bar and with various silver materials (single…”
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Oxygen-induced activation of silica supported silver in acrolein hydrogenation by Bron, M., Teschner, D., Wild, U., Steinhauer, B., Knop-Gericke, A., Volckmar, C., Wootsch, A., Schlögl, R., Claus, P.

“…Acrolein hydrogenation has been studied over Ag/SiO 2 catalysts in a pressure range from 266 mbar to 10 bar. Oxygen pre-treatment of the catalysts enhances…”
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XPS, EM, and Catalytic Studies of the Accumulation of Carbon on Pt Black by Rodriguez, N.M, Anderson, P.E, Wootsch, A, Wild, U, Schlögl, R, Paál, Z

“…Pt black samples were exposed to 2,4-hexadiene (24HD) at 603 and 693 K, alone or in the presence of excess hydrogen. The 24HD underwent C=C double-bond shift,…”
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Characterization and catalytic study of PtGe/Al2O3 catalysts prepared by organometallic grafting by WOOTSCH, A, PAAL, Z, GYORFFY, N, ELLO, S, BOGHIAN, I, LEVERD, J, PIRAULTROY, L

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Pt/Graphite Nanofiber Catalyst in n-Hexane Test Reaction by Baker, R.T.K., Laubernds, K., Wootsch, A., Paál, Z.

“…Five percent Pt on a “platelet-type” graphite nanofiber was active in skeletal reactions of n-hexane at lower temperature than Pt/SiO2. The turnover…”
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Effect of hydrogen pressure on intentional deactivation of unsupported Pt catalyst: Catalytic properties and physical characterization by Paál, Z., Wootsch, A., Bakos, I., Szabó, S., Sauer, H., Wild, U., Schlögl, R.

“…Unsupported Pt black reduced by hydrazine looked like an agglomeration of elongated Pt particles, as confirmed by electron microscopy. Cyclic voltammetry…”
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Ceria as a new support of noble metal catalysts for hydrocarbon reactions: chemisorption and catalytic studies by Teschner, D., Wootsch, A., Röder, T., Matusek, K., Paál, Z.

“…Metal/cerium-oxide systems were practically not studied in hydrocarbon reactions. Chemisorption properties—in temperature programmed reduction, hydrogen…”
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Specific Behavior of Tailor-Made Pt–Ge/Al2O3 Catalysts in Transformation of Hydrocarbons by Wootsch, A., Pirault-Roy, L., Leverd, J., Guérin, M., Paál, Z.

“…Germanium in amounts corresponding nominally to 2 or 1/8 monolayers was added to a 1% Pt/Al2O3 catalyst by controlled surface reaction. These catalysts, noted…”
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Removal of Carbonaceous Residues by Deuterium from Pt Catalysts by Wootsch, Attila, Descorme, Claude, Paál, Zoltán, Duprez, Daniel

“…Mixtures of hexane (nH) and hydrogen (H2) were reacted over EUROPT-1 (6.3% Pt/SiO2) and Pt black. In addition to gas-phase products, including isomers,…”
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Intentional carbonization of Pt black: a model spectroscopic and catalytic study by Paál, Z., Wootsch, A., Matusek, K., Wild, U., Schlögl, R.

“…Pt black was exposed to trans- trans-2,4-hexadiene at two different pressures at 603 K. The surface composition and valence state of carbon upon carbonization…”
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Alkyne hydrogenation over Pd catalysts: A new paradigm by Teschner, Detre, Vass, Elaine, Hävecker, Michael, Zafeiratos, Spiros, Schnörch, Péter, Sauer, Hermann, Knop-Gericke, Axel, Schlögl, Robert, Chamam, Mounir, Wootsch, Attila, Canning, Arran S., Gamman, Jonathan J., Jackson, S. David, McGregor, James, Gladden, Lynn F.

“…The hydrogenation of 1-pentyne over various palladium catalysts was studied under various conditions. In the regime of selective hydrogenation, as observed by…”
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Preferential CO oxidation in hydrogen (PROX) on unsupported PtSn catalyst by TESCHNER, D, WOOTSCH, A, PAAL, Z

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Structural properties of an unsupported model Pt-Sn catalyst and its catalytic properties in cyclohexene transformation: Recent Developments in Model Catalysis - Closing the Gap to Technical Applications by PAAL, Z, WOOTSCH, A, TESCHNER, D, LAZAR, K, SAJO, I. E, GYORFFY, N, WEINBERG, G, KNOP-GERICKE, A, SCHLÖGL, R

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