| 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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Pescarmona, Paolo P.
University of Groningen
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024Activation of low-cost stainless-steel electrodes for efficient and stable anion-exchange membrane water electrolysis
- 2023Novel elastic rubbers from CO2-based polycarbonatescitations
- 2023Novel elastic rubbers from CO2-based polycarbonatescitations
- 2023Nickel Boride (Ni x B) Nanocrystals:From Solid-State Synthesis to Highly Colloidally Stable Inkscitations
- 2023Nickel Boride (NixB) Nanocrystalscitations
- 2019Bio-Based Chemicalscitations
- 2019Bio-based chemicals:Selective aerobic oxidation of tetrahydrofuran-2,5-dimethanol to tetrahydrofuran-2,5-dicarboxylic acid using hydrotalcite-supported gold catalysts
- 2019Bio-based chemicals:Selective aerobic oxidation of tetrahydrofuran-2,5-dimethanol to tetrahydrofuran-2,5-dicarboxylic acid using hydrotalcite-supported gold catalystscitations
- 2018Selective reduction of nitrobenzene to aniline over electrocatalysts based on nitrogen-doped carbons containing non-noble metalscitations
- 2018Selective reduction of nitrobenzene to aniline over electrocatalysts based on nitrogen-doped carbons containing non-noble metalscitations
- 2018Carbon-supported iron complexes as electrocatalysts for the cogeneration of hydroxylamine and electricity in a NO-H2 fuel cellcitations
- 2018Carbon-supported iron complexes as electrocatalysts for the cogeneration of hydroxylamine and electricity in a NO-H-2 fuel cell:A combined electrochemical and density functional theory studycitations
- 2018Electrically-responsive reversible Polyketone/MWCNT network through Diels-Alder chemistrycitations
- 2016Iron-containing N-doped carbon electrocatalysts for the cogeneration of hydroxylamine and electricity in a H-2-NO fuel cellcitations
- 2015New iron pyridylamino-bis(phenolate) catalyst for converting CO2 into cyclic carbonates and cross-linked polycarbonatescitations
- 2013Towards a lattice-matching solid-state batterycitations
Places of action
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article
Nickel Boride (NixB) Nanocrystals
Abstract
<p>Metal borides, a class of materials intensively used in industry as superconductors, magnetic materials, or hot cathodes, remain largely unexplored at the nanoscale mainly due to the difficulty in synthesizing single-phase nanocrystals. Recent works have shown that synthetic methods at lower temperatures (<400 °C) yield amorphous polydisperse nanoparticles, while phase purity is an issue at higher temperatures. Among all the metal-rich borides, nickel borides (Ni<sub>x</sub>B) could be a potential catalyst for a broad range of applications (hydrogenations, electrochemical hydrogen, and oxygen evolution reactions) under challenging conditions (such as high pH or high temperatures). Here, we report a novel solid-state method to synthesize Ni<sub>x</sub>B nanopowders (with a diameter of approximately 45 nm) and their conversion into colloidal suspensions (inks) through treatment of the nanocrystal surface. For the solid-state synthesis, we used commercially available salts and explored the reaction between the Ni and B sources while varying the synthetic parameters under mild and solvent-free reaction conditions. We show that pure phase Ni<sub>3</sub>B and Ni<sub>2</sub>B NCs can be obtained with high yield in the pure phase using as precursors NiCl<sub>2</sub> and Ni, respectively. Through extensive mechanistic studies, we show that Ni nanoclusters (1-2 nm) are an intermediate in the boriding process, while the metal co-reactant lowers the decomposition temperature of NaBH<sub>4</sub> (used as a reducing agent and B source). Size control can instead be exerted through reaction mediators, as seen from the differential nucleation and growth of Ni (clusters) or Ni<sub>x</sub>B NCs when employing L- (amine, phosphine) and X-type (carboxylate) mediators. Applying surface engineering methods to our Ni<sub>x</sub>B NCs, we stabilized them with inorganic (NOBF<sub>4</sub>) or organic (borane tert-butyl amine, oleylamine) ligands in the appropriate solvent (DMSO, hexane). With this method, we produce stable inks for further solution processing applications. Our results provide tools for further development of catalysts based on Ni<sub>x</sub>B NCs and pave the way for synthesizing other metal boride colloidal nanostructures.</p>