| People | Locations | Statistics |
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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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Kibsgaard, Jakob
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2024Stable mass-selected AuTiOx nanoparticles for CO oxidationcitations
- 2024Stable mass-selected AuTiO x nanoparticles for CO oxidationcitations
- 2023Ni 5-x Ga 3+x Catalyst for Selective CO 2 Hydrogenation to MeOH :Investigating the Activity at Ambient Pressure and Low Temperature with Microreactors
- 2023Continuous-flow electrosynthesis of ammonia by nitrogen reduction and hydrogen oxidationcitations
- 2023Continuous-flow electrosynthesis of ammonia by nitrogen reduction and hydrogen oxidationcitations
- 2023Ultra-high vacuum compatible reactor for model catalyst study of ammonia synthesis at ambient pressurecitations
- 2023Ni5-xGa3+x Catalyst for Selective CO2 Hydrogenation to MeOH
- 2022Quantitative operando detection of electro synthesized ammonia using mass spectrometrycitations
- 2022Increasing Ammonia Formation Rates of Li-Mediated Ammonia Synthesis with High Surface Area Copper Electrodes
- 2020The Dissolution Dilemma for Low Pt Loading Polymer Electrolyte Membrane Fuel Cell Catalystscitations
- 2019A rigorous electrochemical ammonia synthesis protocol with quantitative isotope measurements.citations
- 2019A rigorous electrochemical ammonia synthesis protocol with quantitative isotope measurementscitations
- 2017Effects of Gold Substrates on the Intrinsic and Extrinsic Activity of High-Loading Nickel-Based Oxyhydroxide Oxygen Evolution Catalystscitations
- 2016Mesoporous platinum nickel thin films with double gyroid morphology for the oxygen reduction reactioncitations
- 2007Cobalt growth on two related close-packed noble metal surfacescitations
Places of action
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article
Stable mass-selected AuTiOx nanoparticles for CO oxidation
Abstract
<p>Stability under reactive conditions poses a common challenge for cluster- and nanoparticle-based catalysts. Since the catalytic properties of <5 nm gold nanoparticles were first uncovered, optimizing their stability at elevated temperatures for CO oxidation has been a central theme. Here we report direct observations of improved stability of AuTiO<sub>x</sub> alloy nanoparticles for CO oxidation compared with pure Au nanoparticles on TiO<sub>2</sub>. The nanoparticles were synthesized using a magnetron sputtering, gas-phase aggregation cluster source, size-selected using a lateral time-of-flight mass filter and deposited onto TiO<sub>2</sub>-coated micro-reactors for thermocatalytic activity measurements of CO oxidation. The AuTiO<sub>x</sub> nanoparticles exhibited improved stability at elevated temperatures, which is attributed to a self-anchoring interaction with the TiO<sub>2</sub> substrate. The structure of the AuTiO<sub>x</sub> nanoparticles was also investigated in detail using ion scattering spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. The measurements showed that the alloyed nanoparticles exhibited a core-shell structure with an Au core surrounded by an AuTiO<sub>x</sub> shell. The structure of these alloy nanoparticles appeared stable even at temperatures up to 320 °C under reactive conditions, for more than 140 hours. The work presented confirms the possibility of tuning catalytic activity and stability via nanoparticle alloying and self-anchoring on TiO<sub>2</sub> substrates, and highlights the importance of complementary characterization techniques to investigate and optimize nanoparticle catalyst designs of this nature.</p>