A5100459429- Advanced Photocatalysis Techniques
- Advanced Electron Microscopy Techniques and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Electron and X-Ray Spectroscopy Techniques
- Electronic and Structural Properties of Oxides
- TiO2 Photocatalysis and Solar Cells
- Catalytic Processes in Materials Science
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Magnetic and transport properties of perovskites and related materials
- Copper-based nanomaterials and applications
- Plasmonic and Surface Plasmon Research
- Electrocatalysts for Energy Conversion
- Perovskite Materials and Applications
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Nanomaterials in Catalysis
- Advanced oxidation water treatment
- Covalent Organic Framework Applications
- Advanced Battery Technologies Research
- Thermal Radiation and Cooling Technologies
- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Antenna Design and Optimization
- Microwave Engineering and Waveguides
Centre National de la Recherche Scientifique
2018-2025
Laboratoire de physique des Solides
2018-2025
Université Paris-Saclay
2019-2025
Fujian Normal University
2011-2025
Ministry of Education
2025
Xinyang College of Agriculture and Forestry
2024-2025
Synchrotron soleil
2024
Université Paris-Sud
2018-2024
Chongqing Jiaotong University
2020-2023
Hebei University of Science and Technology
2023
The selective hydrogenation of alkynes is an important reaction; however, the catalytic activity and selectivity in this reaction are generally conflicting. In study, ultrafine Pd nanoparticles (NPs) loaded on a graphite-like C3 N4 structure with nitrogen defects (Pd/DCN) synthesized. resulting Pd/DCN exhibits excellent photocatalytic performance transfer ammonia borane. rate superior to those Pd/BCN (bulk without defects) under visible-light irradiation. characterization results density...
The photo-degradation of organic pollutants using solar light is an attractive chemical process for water pollution control. In this study, we synthesized a new composite material consisting silver phosphate (Ag3PO4) sub-microcrystals grown on layered molybdenum disulfide (MoS2) and graphene (GR) hybrid as high-performance photocatalyst the degradation toxic pollutants. This was prepared via simple two-step hydrothermal that used sodium molybdate, thiourea oxide precursors MoS2/GR nitrate...
Silver, king among plasmonic materials, features low inelastic absorption in the visible-infrared (vis-IR) spectral region compared to other metals. In contrast, copper is commonly regarded as too lossy for actual applications. Here, we demonstrate vis-IR plasmons with quality factors >60 long nanowires (NWs), determined by electron energy-loss spectroscopy. We explain this result noticing that most of electromagnetic energy these lies outside metal, thus becoming less sensitive absorption....
Following the lifespan of optical excitations from their creation to decay into photons is crucial in understanding materials properties. Macroscopically, techniques such as photoluminescence excitation spectroscopy provide unique information on photophysics with applications diverse quantum optics or photovoltaics. Materials and emission pathways are affected by nanometer scale variations directly impacting devices performances. However, they cannot be accessed, despite techniques,...
Fe cations produced during the reduction of O 2 on Fe–N–C materials transform into Fe-oxides due to a local increase in pH.
Discontinuous and uneven Li+ flux leads to inhomogeneous reactions, accelerating lithium (Li) dendrite growth reducing the utilization of active materials, which severely impacts performance metal batteries (LMBs). To address this challenge, we propose an effective homogeneous reaction design facilitated by all-aligned nanofibrous architecture, establishes continuous, uniform, rapid pathways throughout battery. This enhances diffusion dynamics ensures a uniform distribution current density,...
The metal-hydride-based "topochemical reduction" process has produced several thermodynamically unstable phases across various transition metal oxide series with unusual crystal structures and nontrivial ground states. Here, by such an oxygen (de-)intercalation method we synthesis a samarium nickelate ordered nickel valences associated tri-component coordination configurations. This structure, formula of Sm9Ni9O22 as revealed four-dimensional scanning transmission electron microscopy...
Perovskite rare-earth nickelates RNiO3 are prototype correlated oxides displaying a metal–insulator transition (MIT) at temperature tunable by the ionic radius of R. Although its precise origin remains debated topic, MIT can be exploited in various types applications, notably for resistive switching and neuromorphic computation. So far, has been mostly studied macroscopic techniques, insights into nanoscale mechanisms were only provided recently X-ray photoemission electron microscopy...
Atomic vibrations and phonons are an excellent source of information on nanomaterials that we can access through a variety methods including Raman scattering, infrared spectroscopy, electron energy-loss spectroscopy (EELS). In the presence plasmon local field, strongly modified and, in particular, their dipolar strengths highly enhanced, thus rendering scattering extremely sensitive techniques. Here, experimentally demonstrate interaction between relativistic vibrational modes nanostructures...
The synergy between free electrons and light has recently been leveraged to reach an impressive degree of simultaneous spatial spectral resolution, enabling applications in microscopy quantum optics. However, the required combination electron optics injection into spectrally narrow modes arbitrary specimens remains a challenge. Here, we demonstrate microelectronvolt resolution with sub-nanometer probe photonic quality factors as high 104. We rely on mode matching tightly focused laser beam...
A novel, facile self-driven photoelectrocatalytic (PEC) system was established for highly selective and efficient recovery of H2S simultaneous electricity production. The key ideas were the self-bias function between a WO3 photoanode Si/PVC photocathode due to their mismatched Fermi levels special cyclic redox reaction mechanism I–/I3–. Under solar light, facilitated separation holes in electrons photocathode, which then generated electricity. Cyclic reactions produced region as follows: I–...
A sodium benzenesulfonate (PhSO3Na)-functionalized reduced graphene oxide was synthesized via a two-step aryl diazonium coupling and subsequent NaCl ion-exchange procedure, which used as support to immobilize tris(bipyridine)ruthenium(II) complex (Ru(bpy)3Cl2) by coordination reaction. This elaborated Ru(bpy)3-rGO catalyst exhibited excellent catalytic efficiency in visible-light-driven reductive dehalogenation reactions under mild conditions, even for ary chloride. Meanwhile, it showed the...
The electrolyte plays an essential role in the advancement of lithium-sulfur batteries (LSBs), as it not only transports charge carriers but also extensively influences sulfur conversion mechanisms and electrode-electrolyte interphases formed on electrode surface, thereby directly impacting battery performance. However, majority existing electrolytes suffer from incompatibility with either Li anode or cathode. Here, we develop a densely packed ion-cluster (DPIE) through strategic combination...
Thermal transport in nanostructures plays a critical role modern technologies. As devices shrink, techniques that can measure thermal properties at nanometer and nanosecond scales are increasingly needed to capture transient, out-of-equilibrium phenomena. We present novel pump–probe photon–electron method within scanning transmission electron microscope (STEM) map temperature dynamics with unprecedented spatial temporal resolutions. By combining focused laser-induced heating synchronized...
Abstract Efficient cycling of lithium (Li) metal batteries (LMBs) under extremely high current conditions is critical for their practical applications. Here, we report a novel additive containing fluorine, nitrogen, and iodine elements (designated as FCS) to stabilize Li anodes in glyme‐based ether electrolytes conditions. Experimental results molecular dynamics (MD) simulations demonstrate that the cation FCS selectively adsorbs on electrode surface, optimizing inner Helmholtz plane (IHP)...
Abstract Layered perovskite‐based compounds offer a range of unconventional properties enabled by their naturally anisotropic structure. Among these, the Carpy‐Galy phases ( A n B O 3 +2 ), characterized (110)‐oriented perovskite planes interleaved with additional oxygen layers, stand out for robust in‐plane polarization. However, challenges associated synthesis ultrathin films and understanding impact strain on limit integration into devices. Here, La 2 Ti 7 = 4) grown substrates imposing...