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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Grunwaldt, Jan-Dierk
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (33/33 displayed)
- 2024Highly loaded bimetallic iron-cobalt catalysts for hydrogen release from ammoniacitations
- 2024Lifecycle of Pd Clusters: Following the Formation and Evolution of Active Pd Clusters on Ceria During CO Oxidation by In Situ/Operando Characterization Techniques
- 2024Unveiling the synergistic effects of pH and Sn content for tuning the catalytic performance of Ni^0/Ni_{x}Sn_{y} intermetallic compounds dispersed on Ce-Zr mixed oxides in the aqueous phase reforming of ethylene glycol
- 2024Pd loading threshold for an efficient noble metal use in Pd/CeO2 methane oxidation catalystscitations
- 2023Green methanol from renewable feeds : Towards scalable catalyst synthesis and improved stability
- 2021Design of bimetallic Au/Cu nanoparticles in ionic liquids: Synthesis and catalytic properties in 5‐(hydroxymethyl)furfural oxidationcitations
- 2020Dynamic structural changes of supported Pd, PdSn, and PdIn nanoparticles during continuous flow high pressure direct H$_{2}$O$_{2}$ synthesiscitations
- 2020Reduction and carburization of iron oxides for Fischer–Tropsch synthesiscitations
- 2020Optimizing Ni-Fe-Ga alloys into Ni$_{2}$FeGa for the hydrogenation of CO$_{2}$ into methanolcitations
- 2020Optimizing Ni-Fe-Ga alloys into Ni 2 FeGa for the hydrogenation of CO 2 into methanolcitations
- 2020Structural dynamics of an iron molybdate catalyst under redox cycling conditions studied with in situ multi edge XAS and XRDcitations
- 2020Microfluidic Crystallization of Surfactant-Free Doped Zinc Sulfide Nanoparticles for Optical Bioimaging Applicationscitations
- 2019Impact of Preparation Method and Hydrothermal Aging on Particle Size Distribution of $Pt/γ-Al_{2}O_{3}$ and Its Performance in CO and NO Oxidationcitations
- 2019Supported Intermetallic PdZn Nanoparticles as Bifunctional Catalysts for the Direct Synthesis of Dimethyl Ether from CO-Rich Synthesis Gascitations
- 2019Chemical Nature of Microfluidically Synthesized AuPd Nanoalloys Supported on TiO2citations
- 2019Mapping the Pore Architecture of Structured Catalyst Monoliths from Nanometer to Centimeter Scale with Electron and X-ray Tomographiescitations
- 2019NH$_{3}$-SCR over V-W/TiO$_{2}$ Investigated by Operando X-ray Absorption and Emission Spectroscopycitations
- 2018Tuning the $mathrm{Pt/CeO_{2}}$ Interface by in Situ Variation of the Pt Particle Sizecitations
- 2018Hydrotreatment of Fast Pyrolysis Bio-oil Fractions Over Nickel-Based Catalystcitations
- 2018Synthesis and Regeneration of Nickel-Based Catalysts for Hydrodeoxygenation of Beech Wood Fast Pyrolysis Bio-Oilcitations
- 2018Synthesis and Regeneration of Nickel-Based Catalysts for Hydrodeoxygenation of Beech Wood Fast Pyrolysis Bio-Oil
- 2017Comparison of the Catalytic Performance and Carbon Monoxide Sensing Behavior of Pd-SnO$_2$ Core@Shell Nanocompositescitations
- 2016Influence of gas atmospheres and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychography
- 2016Influence of gas atmospheres and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychographycitations
- 2014In situ observation of Cu-Ni alloy nanoparticle formation by X-ray diffraction, X-ray absorption spectroscopy, and transmission electron microscopy: Influence of Cu/Ni ratiocitations
- 2014Intermetallic compounds of Ni and Ga as catalysts for the synthesis of methanolcitations
- 2014Intermetallic compounds of Ni and Ga as catalysts for the synthesis of methanolcitations
- 2014Flame-made Cu/ZnO/Al2O3 catalyst for dimethyl ether productioncitations
- 2012CO hydrogenation to methanol on Cu–Ni catalystscitations
- 2012CO hydrogenation to methanol on Cu–Ni catalysts:Theory and experimentcitations
- 2011Flame spray synthesis of CoMo/Al2O3 hydrotreating catalystscitations
- 2009Catalysts at work: From integral to spatially resolved X-ray absorption spectroscopycitations
- 2007Combination of flame synthesis and high-throughput experimentation: the preparation of alumina-supported noble metal particles and their application in the partial oxidation of methanecitations
Places of action
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article
In situ observation of Cu-Ni alloy nanoparticle formation by X-ray diffraction, X-ray absorption spectroscopy, and transmission electron microscopy: Influence of Cu/Ni ratio
Abstract
Silica-supported, bimetallic Cu-Ni nanomaterials were prepared with different ratios of Cu to Ni by incipient wetness impregnation without a specific calcination step before reduction. Different in situ characterization techniques, in particular transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray absorption spectroscopy (XAS), were applied to follow the reduction and alloying process of Cu-Ni nanoparticles on silica. In situ reduction of Cu-Ni samples with structural characterization by combined synchrotron XRD and XAS reveals a strong interaction between Cu and Ni species, which results in improved reducibility of the Ni species compared with monometallic Ni. At high Ni concentrations silica-supported Cu-Ni alloys form a homogeneous solid solution of Cu and Ni, whereas at lower Ni contents Cu and Ni are partly segregated and form metallic Cu and Cu-Ni alloy phases. Under the same reduction conditions, the particle sizes of reduced Cu-Ni alloys decrease with increasing Ni content. Estimates of the metal surface area from sulfur chemisorption and from the XRD particle size generally agree well on the trend across the composition range, but show some disparity in terms of the absolute magnitude of the metal area. This work provides practical synthesis guidelines towards preparation of Cu-Ni alloy nanomaterials with different Cu/Ni ratios, and insight into the application of different in situ techniques for characterization of the alloy formation. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.