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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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Borchardt, Lars
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Direct Mechanocatalysis with Pd Alloyscitations
- 2018Self – supporting Hierarchical Porous PtAg Alloy Nanotubular Aerogels as Highly Active and Durable Electrocatalystscitations
- 2018The mechanochemical Scholl reaction – a solvent-free and versatile graphitization toolcitations
- 2017Mechanochemical Friedel-Crafts Alkylation-A Sustainable Pathway Towards Porous Organic Polymerscitations
- 2016Interactions between electrolytes and carbon-based materials - NMR studies on electrical double-layer capacitors, lithium-ion batteries, and fuel cellscitations
- 2016Design of hierarchically porous carbons with interlinked hydrophilic and hydrophobic surface and their capacitive behaviorcitations
- 2014Functionalised porous nanocomposites: a multidisciplinary approach to investigate designed structures for supercapacitor applicationscitations
- 2014Multimetallic aerogels by template-free self-assembly of Au, Ag, Pt, and Pd nanoparticlescitations
- 2013Functionalised porous nanocompositescitations
- 2013Mixed aerogels from Au and CdTe nanoparticlescitations
Places of action
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article
Multimetallic aerogels by template-free self-assembly of Au, Ag, Pt, and Pd nanoparticles
Abstract
<p>Nanostructured, porous metals are of great interest for material scientists since they combine high surface area, gas permeability, electrical conductivity, plasmonic behavior, and size-enhanced catalytic reactivity. Here we present the formation of multimetallic porous three-dimensional networks by a template-free self-assembly process. Nanochains are formed by the controlled coalescence of Au, Ag, Pt, and Pd nanoparticles in aqueous media, and their interconnection and interpenetration leads to the formation of a self-supporting network. The resulting noble-metal-gels are transformed into solid aerogels by the supercritical drying technique. Compared to previously reported results, the technique is facilitated by exclusion of additional destabilizers. Moreover, temperature control is demonstrated as a powerful tool, allowing acceleration of the gelation process as well as improvement of its reproducibility and applicability. Electron microscopy shows the nanostructuring of the network and its high porosity. XRD and EDX STEM are used to investigate the alloying behavior of the bimetallic aerogels and prove the control of the alloying state by temperature induced phase modifications. Furthermore, the resulting multimetallic aerogels show an extremely low relative density (<0.2%) and a very high surface area (>50 m<sup>2</sup>/g) compared to porous noble metals obtained by other approaches. Electrically conductive thin films as well as hybrid materials with organic polymers are depicted to underline the processability of the materials, which is a key factor regarding handling of the fragile structures and integration into device architectures. Owing to their exceptional and tunable properties, multimetallic aerogels are very promising materials for applications in heterogeneous catalysis and electrocatalysis, hydrogen storage, and sensor systems but also in surface enhanced Raman spectroscopy (SERS) and the preparation of transparent conductive substrates.</p>