
Pascal RousselFrench National Centre for Scientific Research | CNRS · Chimie des Matériaux
Pascal Roussel
CNRS Research Director
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512
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January 2021 - January 2023
September 1994 - September 1999
January 2000 - October 2013
Publications
Publications (512)
Expression of concern for ‘Construction of desert rose flower-shaped NiFe LDH-Ni 3 S 2 heterostructures via seawater corrosion engineering for efficient water-urea splitting and seawater utilization’ by Zhao-Hui Zhang et al. , J. Mater. Chem. A , 2023, 11 , 19578–19590, https://doi.org/10.1039/D3TA02770H.
Photocatalytic performance of titanium dioxide under visible light was optimized by preparing heterophase compounds (containing two or more phases) by hydrolysis method using TiCl4 as a precursor with different concentrations (0.5, 0.7, 1, and 2) to adjust condensation modes of Ti⁴⁺. The structural and textural properties of the synthesized TiO2 mu...
CuM and AgM (M = Cr, Fe) catalysts were synthesized, characterized, and evaluated in methane reforming with CO2 with and without pretreatment under a H2 atmosphere. Their textural and structural characteristics were evaluated using various physicochemical methods, including XRD, B.E.T., SEM-EDS, XPS, and H2-TPR. It was shown that the nature of the...
Miniaturized energy storage devices, such as electrostatic nanocapacitors and electrochemical micro-supercapacitors (MSCs), are important components in on-chip energy supply systems, facilitating the development of autonomous microelectronic devices with enhanced performance and efficiency. The performance of the on-chip energy storage devices heav...
Electrolytic capacitors are known to be fast devices with very low time constant and able to deliver high power. This class of capacitors is then an interesting technology to power miniaturized embedded electronics for Internet of Things applications. However, the current electrolytic capacitor suffers from its bulky size that does not fit with the...
To investigate the influence of Ag and the loading of Ni species, Ni-Ag type catalysts were synthesized with varying Ni/Ag ratios (1, 1.5 and 2) using the coprecipitation method. The catalysts were extensively characterized using various techniques such as TG-DSC-SM, XRD, ICP, BET, SEM-EDX and TPR and subsequently tested in the CH4/CO2 reaction wit...
2D material epitaxy offers the promise of new 2D/2D and 2D/3D heterostructures with their own specific electronic and optical properties. In this work, we demonstrate the epitaxial growth of few layers WSe2 on GaP(111)B by molecular beam epitaxy. Using a combination of experimental techniques, we emphasize the role of the growth temperature and of...
The demand for high‐performance energy storage devices to power Internet of Things applications has driven intensive research on micro‐supercapacitors (MSCs). In this study, RuN films made by magnetron sputtering as an efficient electrode material for MSCs are investigated. The sputtering parameters are carefully studied in order to maximize film p...
Fast charging is a critical concern for the next generation of electrochemical energy storage devices, driving extensive research on new electrode materials for electrochemical capacitors and micro-supercapacitors. Here we introduce a significant advance in producing thick ruthenium nitride pseudocapacitive films fabricated using a sputter depositi...
As a hydrogen carrier and a vital component in fertilizer production, ammonia (NH3) is set to play a crucial role in the planet’s future. While its industrial production feeds half of the global population, it uses fossil fuels and emits greenhouse gases. To tackle this issue, photocatalytic nitrogen fixation using visible light is emerging as an e...
Ruddlesden-Popper LaxSr2−xMnO4−δ materials are interesting symmetric solid oxide fuel cell electrodes due to their good redox stability, mixed ionic and electronic conducting behavior and thermal expansion that matches well with common electrolytes. In reducing environments - as at a solid oxide fuel cell anode - the x = 0.5 member, i.e. La0.5Sr1.5...
Historically, natural products have played a major role in the development of antibiotics. Their complex chemical structures and high polarity give them advantages in the drug discovery process. In the broad range of natural products, sesquiterpene lactones are interesting compounds because of their diverse biological activities, their high-polarit...
Glycine silver nitrate (GSN) and fully deuterated GSN (FDGSN) form two isotopic polymorphs. The effect of full deuteration brought about the isotopic polymorph of GSN. In order to study the effect of partial deuteration on isotopic polymorphs, crystals of C-deuterated GSN (CDGSN) and N-deuterated GSN (NDGSN) were grown. The crystal structure of C d...
The manuscript focuses on a highly stereo-/regioselective approach for synthesizing a diverse array of substituted-3-hydroxy-2-oxindoles. The synthesized compounds were subsequently subjected to anti-proliferative assessment against various cell lines, including colorectal carcinoma, ovarian cancer, and human metastatic melanoma cancer. The structu...
A novel series of potent agonists of the bile acid receptor TGR5 bearing a dihydropyridone scaffold was developed from a high-throughput screen. Starting from a micromolar hit compound, we implemented an extensive structure-activity-relationship (SAR) study with the synthesis and biological evaluation of 83 analogues. The project culminated with th...
Glycine silver nitrate (GSN) and fully deuterated GSN (FDGSN) form two isotopic polymorphs. The effect of full deuteration brought about the isotopic polymorph of GSN. In order to study the effect of partial deuteration on isotopic polymorphs, crystals of C Deuterated GSN (CDGSN) and N deuterated GSN (NDGSN) were grown. The crystal structure of C-d...
Solar-driven interfacial evaporation is an eco-friendly solution for tackling the impending water scarcity the world is facing in our century. In this work, a solar-driven interfacial evaporator was prepared from cigarette butts loaded with petroleum coke powder (Filter-PetCoke), a by-product of the oil refinery processes, for the improvement of th...
A series of new ferrocenyl nitroheterocyclic sulfonylhydrazones (1a-4a and 1b-2b) were prepared by the reaction between formyl (R = H) or acetyl (R = CH3) nitroheterocyclic precursors [4/5-NO2(C5H2XCOR), where X = O, S)] and ferrocenyl tosyl hydrazine [(η5-C5H5)Fe(η5-C5H4SO2-NH-NH2)]. All compounds were characterized by conventional spectroscopic t...
Sesquiterpene lactones (STLs) are a large group of terpenoids most commonly found in plants of the Asteraceae family, e.g., in chicory plants, displaying a wide range of interesting biological activities. However, further studies on the biological potential of chicory-derived STLs and analogues are challenging as only four of these molecules are co...
Oxychalcogenides are emerging as promising alternative candidates for a variety of applications including for energy. Only few phases among them show the presence of Q-Q bonds (Q = chalcogenide anion) while they drastically alter the electronic structure and allow further structural flexibility. Four original oxy(poly)chalcogenide compounds in the...
Polymorphic phases of copper pyrovanadate (α- and β-Cu2V2O7) were synthesized by solid state reaction and the mechanisms governing the phase transitions have been highlighted by the ThermoGravimetric Analysis (TGA) and the Differential Scanning Calorimetry (DSC). The thermal evolution of the lattice parameters was determined by high temperature X-r...
Sesquiterpene lactones (STLs) are a large group of terpenoids most commonly found in plants of the Asteraceae family, e. g. in chicory plants, displaying a wide range of interesting biological activities. However, further studies on the biological potential of chicory derived STLs and analogues are challenging as only four of these molecules are co...
Sesquiterpene lactones (STLs) are a large group of terpenoids most commonly found in plants of the Asteraceae family, e. g. in chicory plants, displaying a wide range of interesting biological activities. However, further studies on the biological potential of chicory derived STLs and analogues are challenging as only four of these molecules are co...
Maximizing the electrochemical performance of 3D micro-supercapacitors based on pseudocapacitive films is crucial for powering the next generation of miniaturized internet of things devices. The films have to be nanostructured, must conform the 3D template, and have uniform deposition. To study the growth mechanism of nanostructured MnO 2 films obt...
Electrochemical lithium (de)intercalation in an atomic layer deposited (ALD) TiO2 anatase thin film deposited on a planar Si /Al2O3/Pt substrate is investigated by Raman spectroscopy. An initial discharge capacity of 63 µAh cm−2 µm−1 (0.5 Li+ mole−1) is reached at C/10 rate, which increases up to 77 µAh cm−2 µm−1 upon further cycles. An excellent c...
Microsupercapacitors (MSCs) have emerged as the next generation of electrochemical energy storage sources for powering miniaturized embedded electronic and Internet of Things devices. Despite many advantages such as high-power density, long cycle life, fast charge/discharge rate, and moderate energy density, MSCs are not at the industrial level in...
Vanadium nitride film made using a thin film deposition technique is a promising electrode material for micro‐supercapacitor applications owing to its high electrical conductivity and high volumetric and surface capacitance values in aqueous electrolyte. Nevertheless, the cycling stability has to be improved to deliver good capacitance during a lar...
NiAlxFe2−xO4 (0 ≤x ≤ 2) was synthesized, characterized and evaluated in methane reforming with CO2 without any pretreatment. It was shown that the nature of the precursor has a significant effect on the structural, textural and reactivity properties. The cell parameters decrease with increasing Al-content which can be explained by the partial subst...
In the search of new organometallic precursors, this contribution describes a convenient synthesis to obtain new ferrocene-based sulfonyl diamine derivatives. The [(η5-C5H4SO2NH-CH2-CH2-NH2)Fe(η5-C5H5)] (1) and [(η5-C5H4SO2NH-C6H4-NH2)Fe(η5-C5H5)] (2) compounds were prepared by the reaction between (η5-C5H4SO2Cl)Fe(η5-C5H5) and the respective diami...
The development of high-performance and robust non-precious metal-based catalysts to accelerate electrocatalytic reaction kinetics is crucial for electrochemical seawater splitting. The common electrocatalysts for seawater electrolysis suffer from sluggish reaction...
Electrocatalytic water splitting to produce hydrogen (H2) is a sustainable way of meeting energy demands at no environmental cost. However, the sluggish anodic reaction imposes a considerable overpotential requirement. By contrast, the electrocatalytic urea oxidation reaction offers the prospect of energy-saving H2 production together with urea-ric...
The main physico‐chemical properties and the underlying influence of thermal treatment on the phase composition and structural characteristics of the natural phosphate Kef Esnoun region in Djebel Onk, Algeria, are discussed in this work. The primary goal is to increase the natural phosphate value as an alternative material in heterogeneous catalysi...
Bimetallic layered double oxide (LDO) NiM (M = Cr, Fe) catalysts with nominal compositions of Ni/M = 2 or 3 were tailored from layered double hydroxides (LDH) using a coprecipitation method to investigate the effects of the trivalent metal (Cr or Fe) and the amount of Ni species on the structural, textural, reducibility, and catalytic properties fo...
The development of high-performance and cost-effective hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalysts is highly required for electro-chemical water splitting. The sluggish reaction kinetics, poor stability, and complicated processing restrict the practical application of most electrocatalysts. Herein, we repo...
The scaling up of wireless operating microelectronics for upcoming Internet of Things (IoT) applications demands high-performance micro-supercapacitors (MSCs) with corresponding high-energy and power capabilities. Indeed, this necessitates the quest for MSC’s electrode materials capable of delivering high energy density at high charge/discharge rat...
A clay-based TiO2 nanocomposite material was synthesized by a facile method, to investigate its structure and photocatalytic efficiency. The supported TiO2 nanoparticles were generated using a sol-gel method, and subsequently, mixed with a suspension of sepiolite. The material was recovered in powder form (Mc-80) and then calcined to properly arran...
Due to its great theoretical capacity (147 mAh g−1) and high operating potential (4.7 V vs Li+/Li), Co‐free spinel LiNi0.5Mn1.5O4 (LNMO) is one of the most promising thin film cathodes allowing designing Li‐ion micro‐batteries with a high specific energy. In this work, the Li extraction–insertion mechanism in sputtered LNMO thin films is investigat...
The ultimate mechanical properties of MgSiO3 orthoenstatite (OEN), as characterized here by the ideal strengths, have been calculated under tensile and shear loadings using first-principles calculations. Both ideal tensile strength (ITS) and shear strength (ISS) are computed by applying homogeneous strain increments along high-symmetry directions (...
The solid-state organization of hole and electron transporting layers plays an important role in governing the performance and stability of emerging optoelectronic devices such as perovskite solar cells (PSCs). The molecular organic semiconductor (OSC) 2,2″,7,7″-tetrakis [N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD) is a promis...
To power the next generation of miniaturized electronic devices, the energy storage capability of Li-ion micro-batteries must be significantly improved and the fabrication of high-performance 3D electrodes is mandatory. Here we show how to carefully match the design of efficient 3D scaffold based on metallic porous template with the deposition para...
Miniaturized electronics suffer from a lack of energy autonomy. In that context, the fabrication of lithium‐ion solid‐state microbatteries with high performance is mandatory for powering the next generation of portable electronic devices. Here, the fabrication of a thin film positive electrode for 3D Li‐ion microbatteries made by the atomic layer d...
In‐Situ Cycling In article number 2100891, Demortiére and co‐workers demonstrate that in‐situ cycling of a LiMn1.5Ni0.5O4 thin‐film cathode in an electrochemical transmission electron microscope (TEM) holder reveals structural and morphologic changes upon (de)lithiation processes. (S)TEM images of the cycled thin‐film reveal the formation of voids,...
In this article we demonstrate that in-situ cycling of a LiMn1.5Ni0.5O4 thin-film cathode in an electrochemical transmission electron microscope (TEM) holder reveals structural and morphologic changes upon (de)lithiation processes. (S)TEM images of the cycled thin-film reveal the formation of voids, cracks, and organic decomposition products. The 4...
Two new oxyfluorides with a pyrochlore-type structure, Na 2 Nb 2 O 5 F 2 and Na 2 Ta 2 O 5 F 2 , have been obtained and for which the XRD crystallographic study coupled with ¹⁹ F solid state NMR reveals an unusual O/F...
Micro‐batteries are attractive miniaturized energy devices for new Internet of Things applications, but the lack of understanding of their degradation process during cycling hinders improving their performance. Here focused ion beam (FIB)‐lamella from LiMn1.5Ni0.5O4 (LMNO) thin‐film cathode is in situ cycled in a liquid electrolyte inside an electr...
The chain shuttling ring-opening copolymerization of l-lactide with ε-caprolactone has been achieved using two aluminum catalysts presenting different selectivities and benzyl alcohol as chai