David Portehault
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View article: Crystallization of manganese (V) oxides by hydroflux synthesis: Control of anisotropic growth and electrochemical stability
Crystallization of manganese (V) oxides by hydroflux synthesis: Control of anisotropic growth and electrochemical stability Open
Despite intriguing optical, magnetic, and redox properties, inorganic materials containing pentavalent manganese (Mn5+) are rare and could never be designed as shape-controlled crystals, which limits the ability to tune properties. Herein,…
View article: Multifunctional Supramolecular Gels with Strong Mechanical Properties Formed by Self-Assembly of Polyoxometalate-Based Coordination Polymers
Multifunctional Supramolecular Gels with Strong Mechanical Properties Formed by Self-Assembly of Polyoxometalate-Based Coordination Polymers Open
Metallogels built in a bottom-up approach by metal coordination and supramolecular interactions have important potential for the elaboration of smart materials. In this context, we present here the formation of supramolecular coordination …
View article: Transforming Nanocrystals into Superhard Boron Carbide Nanostructures
Transforming Nanocrystals into Superhard Boron Carbide Nanostructures Open
Boron carbide (B4+δC) possesses a large potential as a structural material owing to its lightness, refractory character, and outstanding mechanical properties. However, its large-scale industrialization is set back by its tendency to amorp…
View article: The silicon chemistry analogue to the sol-gel process
The silicon chemistry analogue to the sol-gel process Open
International audience
View article: Unveiling the Potential of Redox Chemistry to Form Size-Tunable, High-Index Silicon Particles
Unveiling the Potential of Redox Chemistry to Form Size-Tunable, High-Index Silicon Particles Open
Silicon particles of intermediate sizes (75-200 nm) scatter visible wavelengths, making them promising candidates for optical devices. The solution synthesis of silicon particles in this size range, however, has proved challenging for chem…
View article: Covalent Transition Metal Borosilicides: Reaction Pathways in Molten Salts for Water Oxidation Electrocatalysis
Covalent Transition Metal Borosilicides: Reaction Pathways in Molten Salts for Water Oxidation Electrocatalysis Open
The properties of transition metal borides and silicides are intimately linked to the covalent character of the chemical bonds within their crystal structures. Bringing boron and silicon together within metal borosilicides can then engende…
View article: Size control of silicon particles via reduction of a hexacoordinated silicon complex
Size control of silicon particles via reduction of a hexacoordinated silicon complex Open
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View article: Redox reaction between a silicon Zintl phase and coordination complex to form silicon particles of tunable size
Redox reaction between a silicon Zintl phase and coordination complex to form silicon particles of tunable size Open
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View article: BaNiO3 electrocatalysts for oxygen evolution reaction: the role of synthetic methods
BaNiO3 electrocatalysts for oxygen evolution reaction: the role of synthetic methods Open
BaNiO3 and other Ba-Ni-O related phases are among the most active non-precious electrocatalysts towards the oxygen evolution reaction (OER) in basic media. In this work, we compare the electrocatalytic activities of the hexagonal perovskit…
View article: Size-tunable silicon nanoparticles synthesized in solution <i>via</i> a redox reaction
Size-tunable silicon nanoparticles synthesized in solution <i>via</i> a redox reaction Open
A new liquid-phase redox synthesis to form silicon nanoparticles allows the solvent used during synthesis to determine particle size and fluorescent properties.
View article: Silver and Copper Nitride Cooperate for CO Electroreduction to Propanol
Silver and Copper Nitride Cooperate for CO Electroreduction to Propanol Open
The need of carbon sources for the chemical industry, alternative to fossil sources, has pointed to CO 2 as a possible feedstock. While CO 2 electroreduction (CO 2 R) allows production of interesting organic compounds, it suffers from larg…
View article: Silver and Copper Nitride Cooperate for CO Electroreduction to Propanol
Silver and Copper Nitride Cooperate for CO Electroreduction to Propanol Open
The need of carbon sources for the chemical industry, alternative to fossil sources, has pointed to CO 2 as a possible feedstock. While CO 2 electroreduction (CO 2 R) allows production of interesting organic compounds, it suffers from larg…
View article: Metal–Support Interactions in Pt-WO<sub>3</sub> Heterostructures: Role of WO<sub>3</sub> Polymorphism
Metal–Support Interactions in Pt-WO<sub>3</sub> Heterostructures: Role of WO<sub>3</sub> Polymorphism Open
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View article: Galvanic Replacement and Etching of MAX-Related Phases in Molten Salts toward MXenes: An <i>In Situ</i> Study
Galvanic Replacement and Etching of MAX-Related Phases in Molten Salts toward MXenes: An <i>In Situ</i> Study Open
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View article: Heterostructured Cobalt Silicide Nanocrystals: Synthesis in Molten Salts, Ferromagnetism, and Electrocatalysis
Heterostructured Cobalt Silicide Nanocrystals: Synthesis in Molten Salts, Ferromagnetism, and Electrocatalysis Open
Nanoscale heterostructures of covalent intermetallics should give birth to a wide range of interface-driven physical and chemical properties. Such a level of design however remains unattainable for most of these compounds, due to the diffi…
View article: CSD 2073127: Experimental Crystal Structure Determination
CSD 2073127: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: Molten Salts‐Driven Discovery of a Polar Mixed‐Anion 3D Framework at the Nanoscale: Zn<sub>4</sub>Si<sub>2</sub>O<sub>7</sub>Cl<sub>2</sub>, Charge Transport and Photoelectrocatalytic Water Splitting
Molten Salts‐Driven Discovery of a Polar Mixed‐Anion 3D Framework at the Nanoscale: Zn<sub>4</sub>Si<sub>2</sub>O<sub>7</sub>Cl<sub>2</sub>, Charge Transport and Photoelectrocatalytic Water Splitting Open
Mixed‐anion compounds widen the chemical space of attainable materials compared to single anionic compounds, but the exploration of their structural diversity is limited by common synthetic paths. Especially, oxychlorides rely mainly on la…
View article: Tuning of Oxygen Electrocatalysis in Perovskite Oxide Nanoparticles by the Cationic Composition
Tuning of Oxygen Electrocatalysis in Perovskite Oxide Nanoparticles by the Cationic Composition Open
International audience
View article: Molten Salts‐Driven Discovery of a Polar Mixed‐Anion 3D Framework at the Nanoscale: Zn<sub>4</sub>Si<sub>2</sub>O<sub>7</sub>Cl<sub>2</sub>, Charge Transport and Photoelectrocatalytic Water Splitting
Molten Salts‐Driven Discovery of a Polar Mixed‐Anion 3D Framework at the Nanoscale: Zn<sub>4</sub>Si<sub>2</sub>O<sub>7</sub>Cl<sub>2</sub>, Charge Transport and Photoelectrocatalytic Water Splitting Open
Mixed‐anion compounds widen the chemical space of attainable materials compared to single anionic compounds, but the exploration of their structural diversity is limited by common synthetic paths. Especially, oxychlorides rely mainly on la…
View article: Revealing the Elusive Structure and Reactivity of Iron Boride α-FeB
Revealing the Elusive Structure and Reactivity of Iron Boride α-FeB Open
Crystal structures can strongly deviate from bulk states when confined into nanodomains. These deviations may deeply affect properties and reactivity and then call for a close examination. In this work, we address the case where extended c…
View article: A Confinement‐Driven Nucleation Mechanism of Metal Oxide Nanoparticles Obtained via Thermal Decomposition in Organic Media
A Confinement‐Driven Nucleation Mechanism of Metal Oxide Nanoparticles Obtained via Thermal Decomposition in Organic Media Open
Thermal decomposition is a very efficient synthesis strategy to obtain nanosized metal oxides with controlled structures and properties. For the iron oxide nanoparticle synthesis, it allows an easy tuning of the nanoparticle's size, shape,…
View article: Addressing Complex Transition Metal Oxides at the Nanoscale: Bottom‐Up Syntheses of Nano‐objects and Properties
Addressing Complex Transition Metal Oxides at the Nanoscale: Bottom‐Up Syntheses of Nano‐objects and Properties Open
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View article: Liquid Processing of Bismuth–Silica Nanoparticle/Aluminum Matrix Nanocomposites for Heat Storage Applications
Liquid Processing of Bismuth–Silica Nanoparticle/Aluminum Matrix Nanocomposites for Heat Storage Applications Open
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View article: <i>In situ</i> liquid transmission electron microscopy reveals self-assembly-driven nucleation in radiolytic synthesis of iron oxide nanoparticles in organic media
<i>In situ</i> liquid transmission electron microscopy reveals self-assembly-driven nucleation in radiolytic synthesis of iron oxide nanoparticles in organic media Open
A new insight into the early stages of iron oxide nanoparticle formation was obtained by in situ liquid transmission electron microscopy which allowed the visualization, in real time at the nanoscale, of the pre-nucleation arrangements of …
View article: Geoinspired syntheses of materials and nanomaterials
Geoinspired syntheses of materials and nanomaterials Open
State-of-the-art synthesis pathways towards novel inorganic materials and nanomaterials are presented in the light of their relationship with geosciences, showing how geological phenomena can inspire innovative synthesis methods and materi…