Damien Voiry

Damien Voiry
Université de Montpellier | UM1 · Institut Européen des Membranes

PhD

About

69
Publications
29,274
Reads
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18,050
Citations
Introduction
One postdoc position is available in my group to work on the development of novel electrocatalysts for the reduction of CO2.
Additional affiliations
February 2016 - present
Université de Montpellier
Position
  • Researcher
January 2011 - February 2016
Rutgers, The State University of New Jersey
Position
  • PostDoc Position
November 2007 - October 2010
Centre de Recherche Paul Pascal
Position
  • PhD Student

Publications

Publications (69)
Article
Full-text available
Transition metal dichalcogenides (TMDs) membranes exhibit good anti‐swelling properties but poor water desalination property. Here, we report a one‐step covalent functionalization of MoS2 nanosheets for membrane fabrication, which was accomplished by simultaneous exfoliating and grafting the lithium ion intercalated MoS2 in organic iodide water sol...
Article
Full-text available
Electrochemical synthesis of NH 3 is a carbon-free alternative to the traditional Haber-Bosch process. Obtaining NH 3 from environmental pollutants, such as nitrates or nitrites, is a more practical route than from the nitrogen reduction reaction (NRR) due to the difficult cleavage of the inert triple bond of nitrogen gas. Here, a novel heterogeneo...
Article
Full-text available
Solar‐to‐Ammonia Efficiency In article 2108316, Damien Voiry and co‐workers report a single atom catalyst based on iron single atoms supported on 2D MoS2 nanosheets. The catalyst demonstrates near‐unity selectivity for the electrosynthesis of ammonia with a solar‐to‐NH3 efficiency of 3.4% when coupled to an external InGaP/GaAs/Ge triple‐junction so...
Article
Transition metal dichalcogenide (TMD) nanomaterials, especially the mono- or few-layer ones, have received extensive research interest owing to their versatile properties, ranging from true metals (e.g., NbS2 and VSe2) and semimetals (e.g., WTe2 and TiSe2) to semiconductors (e.g., MoS2 and We2) and insulators (e.g., HfS2). Therefore, the reliable p...
Article
Full-text available
The conversion of CO 2 into desirable multicarbon products via the electrochemical reduction reaction holds promise to achieve a circular carbon economy. Here, we report a strategy in which we modify the surface of bimetallic silver-copper catalyst with aromatic heterocycles such as thiadiazole and triazole derivatives to increase the conversion of...
Preprint
Full-text available
Electrochemical synthesis of NH 3 is a carbon-free alternative to the traditional Haber-Bosch process. The challenge with nitrogen reduction reaction (NRR) to NH 3 is cleavage of the inert N≡N triple bond of nitrogen gas. Obtaining NH 3 from environmental pollutants, such as nitrates or nitrites, is a more practical route than NRR. However, reducti...
Preprint
Full-text available
The conversion of CO 2 into desirable multicarbon products such as ethylene and ethanol via the carbon dioxide reduction reaction (CO 2 RR) hold promise to achieve a circular carbon economy. The develop of such a technology is currently hampered by the lack of catalysts, which can drive the reaction at industrially relevant current densities with h...
Article
Full-text available
The electrochemical reduction of CO 2 in a highly selective and efficient manner is a crucial step toward its reuse for the production of chemicals and fuels. Nanostructured Ag catalysts have been found to be effective candidates for the conversion of CO 2-to-CO. However, the ambiguous determination of the intrinsic CO 2 activity and the maximizati...
Article
Full-text available
Hydrogen Evolution Reaction (HER) is an attractive technology for chemical conversion of energy. Replacement of platinum with inexpensive and stable electrocatalysts remains a major bottleneck hampering large-scale hydrogen production by using clean and renewable energy sources. Here, we report electrocatalytically active and ultra-stable Polymer-D...
Article
Full-text available
Enzymes are biological catalysts that are interesting for key reactions such as hydrogen evolution, CO 2 conversion into hydrocarbons and the fixation of nitrogen. Enzymes are particularly good catalysts for organic reactions because of their high selectivity. However, they exhibit modest stability and require extensive purification, which makes th...
Article
Single-atom catalysts (SACs) have recently attracted interest in the fields of heterogeneous catalysis and electrocatalysis due to the enhancement in intrinsic activity and selectivity through optimized exposure of the active sites. Synthesis of SACs and research into their behavior have helped to elucidate the kinetics and thermodynamics of severa...
Article
Full-text available
Metallic transition metal dichalcogenides (TMDs)1–8 are good catalysts for the hydrogen evolution reaction (HER). The overpotential and Tafel slope values of metallic phases and edges⁹ of two-dimensional (2D) TMDs approach those of Pt. However, the overall current density of 2D TMD catalysts remains orders of magnitude lower (~10–100 mA cm⁻²) than...
Article
Developing highly active non‐precious metal catalysts for the oxygen reduction reaction (ORR) is of great significance to reduce the cost of fuel cells. Three‐dimensional ordered porous structures could substantially improve the performance of the catalysts because of its excellent mass diffusion properties and high specific surface area. Herein, w...
Article
Full-text available
Nanolaminate membranes made of two-dimensional materials such as graphene oxide are promising candidates for molecular sieving via size-limited diffusion in the two-dimensional capillaries, but high hydrophilicity makes these membranes unstable in water. Here, we report a nanolaminate membrane based on covalently functionalized molybdenum disulfide...
Article
Single atom catalysts provide exceptional activity. However, measuring the intrinsic catalytic activity of a single atom in real electrochemical environments is challenging. Here, we report the activity of a single sulfur vacancy for electrocatalytically evolving hydrogen in two dimensional (2D) MoS2. Surprisingly, we find that the catalytic activi...
Article
Low-dimensional materials and their hybrids have emerged as promising candidates for electrocatalytic and photocatalytic hydrogen evolution and CO2 conversion into useful molecules. Progress in synthetic methods for the production of catalysts coupled with a better understanding of the fundamental catalytic mechanisms has enabled the rational desig...
Conference Paper
Using transient absorption spectroscopy, we observe the formation of long-lived charge transfer states in polymer:fullerene – MoS2 van der Waals heterostructures at sub-picosecond timescales.
Article
Full-text available
Crystalline and amorphous transition metal chalcogenides such as MoS2 are currently recognized as state-of-the-art non-precious transition metal catalysts for the hydrogen evolution reaction (HER). Nevertheless, despite numerous studies dedicated to their electrocatalytic activities, the exact nature of the active sites as well as their interaction...
Article
Full-text available
We present a portable non-invasive approach for measuring indicators of inflammation and oxidative stress in the respiratory tract by quantifying a biomarker in exhaled breath condensate (EBC). We discuss the fabrication and characterization of a miniaturized electrochemical sensor for detecting nitrite content in EBC using reduced graphene oxide....
Article
2D transition metal dichalcogenide MoS2 nanosheets are increasingly attracting interests due to their promising applications in materials science and biomedicine. However, their biocompatibility and their biodegradability have not been thoroughly studied yet. Here, the biodegradability of exfoliated pristine and covalently functionalized MoS2 (f-Mo...
Conference Paper
We observed ultrafast hole transfer from monolayer MoS2 to a conjugated polymer using pump-probe measurements. We show that plasmonic metasurfaces lead to enhanced absorption in in the heterojunction, with a 90-nm absorption bandwidth increase.
Article
Full-text available
Integration of organic/inorganic hybrid perovskites with metallic or semiconducting phases of 2D MoS2 nanosheets via solution processing is demonstrated. The results show that the collection of charge carriers is strongly dependent on the electronic properties of the 2D MoS2 with metallic MoS2 showing high responsivity and the semiconducting phase...
Article
Hybrid organic-inorganic heterostructures are attracting tremendous attention for optoelectronic applications due to their low-cost processing and high performance in devices. In particular, van der Waals p-n heterjunctions formed between inorganic two-dimensional (2D) materials and organic semiconductors are of interest due to the quantum confinem...
Article
Full-text available
Zinc Oxide (ZnO) and graphene (G) have been extensively studied because of their unique physical properties. Here, Graphene-Zinc Oxide (G/ZnO) nanolaminates were fabricated, respectively, by chemical vapor deposition and low temperature atomic layer deposition technique. The number of obtained G/ZnO layers was tuned from 1 to 11 with a total thickn...
Article
Efficient exfoliation of graphite in solutions to obtain high-quality graphene flakes is desirable for printable electronics, catalysis, energy storage, and composites. Graphite oxide with large lateral dimensions has an exfoliation yield of ˜100% but it has not been possible to completely remove the oxygen functional groups so that the reduced for...
Article
Single crystals of ReS2 (I) and ReSe2 (II) are grown by a modified Bridgman method from the constituent elements (evacuated quartz tubes, 1100 °C, 24 h; cooling to 900 °C at a rate of 1 °C/h).
Article
Full-text available
In our quest to make various chemical processes sustainable, the development of facile synthetic routes and inexpensive catalysts can play a central role. Herein we report the synthesis of monodisperse, polyaniline (PANI)-derived mesoporous carbon nanoparticles (PAMCs) that can serve as efficient metal-free electrocatalysts for the hydrogen peroxid...
Article
The excellent catalytic activity of metallic MoS2 edges for the hydrogen evolution reaction (HER) has led to substantial efforts towards increasing the edge concentration. The 2H basal plane is less active for the HER because it is less conducting and therefore possesses less efficient charge transfer kinetics. Here we show that the activity of the...
Article
MoS2 is a promising candidate for electronic and optoelectronic applications. However, its application in light harvesting has been limited in part due to crystal defects, often related to small crystalline sizes, which diminish charge separation and transfer. Here we demonstrate a surface engineering strategy for 2D MoS2 to improve its photoelectr...
Article
We report the synthesis of high-quality single crystals of ReS2 and ReSe2 transition metal dichalcogenides using a modified Bridgman method that avoids the use of a halogen transport agent. Comprehensive structural characterization using X-ray diffraction and electron microscopy confirm a distorted triclinic 1T′ structure for both crystals and reve...
Article
In the recent context of emerging two-dimensional (2D) materials, a comprehensive set of spatially resolved photoelectron spectroscopic techniques providing information ranging from surface chemical states to electronic band structure must be available at the practical level (i.e. from laboratory-based instrumentation) for a better understanding of...
Article
Two-dimensional (2D) transition-metal dichalcogenide (TMD) nanosheets have emerged as a fascinating new class of materials for catalysis. These nanosheets are active for several important catalysis reactions including hydrogen evolution from water. The rich chemistry of TMDs combined with numerous strategies that allow tuning of their electronic pr...
Article
Significant interest has grown in the development of earth-abundant and efficient catalytic materials for hydrogen generation. Layered transition metal dichalcogenides present opportunities for efficient electrocatalytic systems. Here, we report the modification of 1D MoOx/ MoS2 core−shell nanostructures by lithium intercalation and the correspondi...
Article
Full-text available
Two-dimensional (2D) transition-metal dichalcogenides (TMDs) consist of over 40 compounds. Complex metal TMDs assume the 1T phase where the transition-metal atom coordination is octahedral. The 2H phase is stable in semiconducting TMDs where the coordination of metal atoms is trigonal prismatic. Stability issues have hampered the study of interesti...
Article
Hybrid nanostructured materials comprised amorphous carbon nanoneedles (CNN)-supported Co3O4 nanoparticles (Co3O4-CNN) were synthesized. The synthesis involved layer-by-layer nanocasting of cellulose nanowhiskers with cobalt oxide and silica precursors, followed by pyrolysis of the core-shell-shell composite materials and etching of the outer silic...
Article
Full-text available
Transition metal dichalcogenides (TMDs) represent a family of materials with versatile electronic, optical, and chemical properties. Most TMD bulk crystals are van der Waals solids with strong bonding within the plane but weak interlayer bonding. The individual layers can be readily isolated. Single layer TMDs possess intriguing properties that are...
Article
Full-text available
Efficient intercalation of ions in layered materials forms the basis of electrochemical energy storage devices such as batteries and capacitors. Recent research has focused on the exfoliation of layered materials and then restacking the two-dimensional exfoliated nanosheets to form electrodes with enhanced electrochemical response. Here, we show th...
Article
Full-text available
Carbon dioxide (CO 2) is one of the main gases produced by human activity and is responsible for the green house effect. Numerous routes for CO 2 capture and reduction are currently under investigation. Another ap-proach to mitigate the CO 2 content in the atmosphere is to convert it into useful species such as hydrocarbon mole-cules that can be us...
Article
Full-text available
Reduction of carbon nanohorn (CNH) aggregates by potassium naphthalenide resulted in their dismantling and individualization. Furthermore, the reduced CNHs were functionalized by addition of electrophiles.
Article
Using renewable resources to make various synthetic materials is intensifying in order to meet some of our sustainability challenges. Yeast is one of the most common household ingredients, which is cheap and easy to reproduce. Herein we report that yeast cells can be thermally transformed into hollow, core-shell heteroatom-doped carbon microparticl...
Article
Controlling the band gap by tuning the lattice structure through pressure engineering is a relatively new route for tailoring the optoelectronic properties of two dimensional (2D) materials. Here we investigate the electronic and lattice vibrational dynamics of the distorted monolayer 1T-MoS2 (1T') and the monolayer 2H-MoS2 via a diamond anvil cell...
Article
Full-text available
Chemical functionalization of low-dimensional materials such as nanotubes, nanowires and graphene leads to profound changes in their properties and is essential for solubilizing them in common solvents. Covalent attachment of functional groups is generally achieved at defect sites, which facilitate electron transfer. Here, we describe a simple and...
Article
Molybdenum disulfide (MoS2) multilayers with functional polyelectrolyte nanospacing layers are presented. Taking advantage of the facile method of layer-by-layer (LbL) assembly, individual chemically exfoliated MoS2 layers are not only effectively isolated from interlayer coupling but also doped by functional polymeric layers. By comparing two type...
Article
Full-text available
Two dimensional transition metal dichalcogenides (2D TMDs) offer promise as opto-electronic materials due to their direct band gap and reasonably good mobility values. However, most metals form high resistance contacts on semiconducting TMDs such as MoS2. The large contact resistance limits the performance of devices. Unlike bulk materials, low con...
Article
The production of two-dimensional rhenium disulfide (ReS2) nanosheets by exfoliation using lithium intercalation is demonstrated. The vibrational and photoluminescence properties of the exfoliated nanosheets are investigated, and the local atomic structure is studied by scanning and transmission electron microscopy. The catalytic activity of the na...
Article
Ultrathin molybdenum disulphide (MoS2) has emerged as an interesting layered semiconductor because of its finite energy bandgap and the absence of dangling bonds. However, metals deposited on the semiconducting 2H phase usually form high-resistance (0.7 kΩ μm-10 kΩ μm) contacts, leading to Schottky-limited transport. In this study, we demonstrate t...
Article
Encapsulation of electronic devices based on organic materials that are prone to degradation even under normal atmospheric conditions with hermetic barriers is crucial for increasing their lifetime. A challenge is to develop 'ultrabarriers' that are impermeable, flexible, and preferably transparent. Another important requirement is that they must b...
Article
Composite materials: Tungsten disulfide and WS2 /reduced graphene oxide (WS2 /rGO) nanosheets were fabricated by hydrothermal synthesis using tungsten chloride, thioacetamide, and graphene oxide (GO) as starting materials. The WS2 nanosheets are efficiently templated on the rGO layer. The WS2 /rGO hybrid nanosheets show much better electrocatalytic...
Article
We report chemically exfoliated MoS2 nanosheets with a very high concentration of metallic 1T phase using a solvent free intercalation method. After removing the excess of negative charges from the surface of the nanosheets, highly conducting 1T phase MoS2 nanosheets exhibit excellent catalytic activity toward the evolution of hydrogen with a notab...
Article
Full-text available
Chemical doping of graphene with small boron nitride (BN) domains has been shown to be an effective way of permanently modulating the electronic properties in graphene. Herein we show a facile method of growing large area graphene doped with small BN domains on copper foils using a single step CVD route with methane, boric acid powder and nitrogen...
Article
The oxygen reduction reaction (ORR)-one of the two half reactions in fuel cells-is one of the bottlenecks that has plagued fuel cells from getting a wide range of applications today. This is because ORR is inherently a sluggish reaction; it is also because inexpensive and sustainable ORR electrocatalysts that are not only efficient but also are bas...
Article
Full-text available
The ability to efficiently evolve hydrogen via electrocatalysis at low overpotentials holds tremendous promise for clean energy. Hydrogen evolution reaction (HER) can be easily achieved from water if a voltage above the thermodynamic potential of the HER is applied. Large overpotentials are energetically inefficient but can be lowered with expensiv...
Article
Nanoscale heterostructures with quantum dots, nanowires, and nanosheets have opened up new routes toward advanced functionalities and implementation of novel electronic and photonic devices in reduced dimensions. Coherent and passivated heterointerfaces between electronically dissimilar materials can be typically achieved through composition or dop...
Article
A two-dimensional crystal of molybdenum disulfide (MoS2) monolayer is a photoluminescent direct gap semiconductor in striking contrast to its bulk counterpart. Exfoliation of bulk MoS2 via Li intercalation is an attractive route to large-scale synthesis of monolayer crystals. However, this method results in loss of pristine semiconducting propertie...
Article
Full-text available
Soluble single-walled carbon nanotube (SWNT) salts have been synthesized with varying negative charges, and their saturation solubilities in DMSO measured. A thermodynamic model of the Gibbs free energy of dissolution, widely used for polyelectrolytes, reproduces the experimental results with striking agreement. SWNT salts appear as a paradigm of s...
Article
Carbon nanotubes and graphene are promising allotropes of carbon for a large range of applications. Due to their tendency to aggregate, modifications of the carbon surface are required in order to manipulate them. Covalent functionalization is one of the ways commonly used to reach this target even if this route is not controllable. The study prese...
Article
Industrial, CVD multi-walled carbon nanotubes are shown to form true solutions by reduc-tion with alkali metals and subsequent exposure to polar solvents such as DMSO. Addition of an electrophile such as bromo-decanoic acid allows functionalization of the tubes. The whole process, dissolution and functionalization includes no harsh treatment such a...