| 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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Bucher, Jan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2023The more the better:on the formation of single-phase high entropy alloy nanoparticles as catalysts for the oxygen reduction reactioncitations
- 2023The more the better: on the formation of single-phase high entropy alloy nanoparticles as catalysts for the oxygen reduction reactioncitations
- 2023The more the bettercitations
- 2022High entropy alloy nanoparticle formation at low temperatures
- 2020Solvent-dependent growth and stabilization mechanisms of surfactant-free colloidal Pt nanoparticlescitations
- 2020Solvent-dependent growth and stabilization mechanisms of surfactant-free colloidal Pt nanoparticlescitations
- 2018On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Methodcitations
- 2018Solutions for catalysis: A surfactant-free synthesis of precious metal nanoparticle colloids in mono-alcohols for catalysts with enhanced performances
Places of action
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conferencepaper
Solutions for catalysis: A surfactant-free synthesis of precious metal nanoparticle colloids in mono-alcohols for catalysts with enhanced performances
Abstract
To optimize precious metal nanocatalysts, an optimal set of nanoparticle (NP) properties (<i>composition, size, loading, etc</i>.)must match specific operating conditions. Synthesis routes offeringindependent control on NP properties are then highly desired: (1) tostudy which combinations of properties are key for an application, (2)to optimize performances, (3) to develop industrial applications if theproduction method is scalable.<br/>Independent control on heterogeneouscatalysts' properties is challenging with the direct formation of NPs onsupports: agglomeration and NP formation in pores lead tounderutilization of the precious metal under catalytic operation.Ourstrategy is to use colloids to optimise independently several physicalproperties of the NPs.Yet in colloidal productions, surfactants aretypically required and need to be removed in energy and time consumingsteps, resulting in loss of catalytic performances due to sintering andpoisoning.<br/><br/>A surfactant-free colloidal synthesis adressing theprevious challenges is presented. Pt NPs are obtained at low temperature(< 80 C) in alkaline mono-alcohols. The method is robust,reproducible, promisingly scalable and flexible (e.g. using microwaves,hot water bath, UV irradiation, flow systems). The mono-alcoholsynthesis shows multiple benefits over alternative routes. It isinterestingly sensitive to parameters screened in other approaches. Theinfluence of solvents,<sup> </sup>time of synthesis and nature of base<sup> </sup>toachieve NP size in the range 1-6 nm and colloidal stability overseveral months, including in aqueous media, are detailed. The NPs arecharacterized by TEM, STEM, FTIR, SAXS, PDF, XAS, and electrochemicalmethods.<br/>The energy, time and cost effective production of NPs in lowboiling point solvents leads to improved catalytic performancescompared to industrial benchmark for chemical production (butanonehydrogenation) and energy conversion (oxygen reduction).