A5082788658- Gold and Silver Nanoparticles Synthesis and Applications
- Molecular Junctions and Nanostructures
- Spectroscopy and Quantum Chemical Studies
- Electrochemical Analysis and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Electrocatalysts for Energy Conversion
- Plasmonic and Surface Plasmon Research
- Advanced Chemical Physics Studies
- Catalytic Processes in Materials Science
- Photochemistry and Electron Transfer Studies
- Surface Chemistry and Catalysis
- Surface and Thin Film Phenomena
- Machine Learning in Materials Science
- Semiconductor materials and devices
- Molecular spectroscopy and chirality
- Crystallography and molecular interactions
- Graphene research and applications
- Nanocluster Synthesis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Various Chemistry Research Topics
- Advanced biosensing and bioanalysis techniques
- Near-Field Optical Microscopy
- Fuel Cells and Related Materials
- Protein Interaction Studies and Fluorescence Analysis
- Quantum Dots Synthesis And Properties
Collaborative Innovation Center of Chemistry for Energy Materials
2013-2025
Fudan University
2013-2025
Hefei University
2024-2025
KTH Royal Institute of Technology
2010-2019
University of Science and Technology of China
2010-2019
Yanshan University
2017
Xiamen University
2005-2013
Institute of Atomic and Molecular Sciences, Academia Sinica
2008
Kansas State University
1999
With octahedral Au nanocrystals as seeds, highly monodisperse Au@Pd and Au@Ag core-shell nanocubes were synthesized by a two-step seed-mediated method in aqueous solution. Accordingly, we have preliminarily proposed general rule that the atomic radius, bond dissociation energy, electronegativity of core shell metals play key roles determining conformal epitaxial layered growth mode.
ConspectusThe rational design of highly efficient catalysts relies on understanding their structure-activity relationships and reaction mechanisms at a molecular level. Such an can be obtained by in situ monitoring dynamic processes using surface-sensitive techniques. Surface-enhanced Raman spectroscopy (SERS) provide rich structural information with ultrahigh surface sensitivity, even down to the single-molecule level, which makes it promising tool for study catalysis. However, only few...
The future deployment of terawatt-scale proton exchange membrane water electrolyzer (PEMWE) technology necessitates development an efficient oxygen evolution catalyst with low cost and long lifetime. Currently, the stability most active iridium (Ir) catalysts is impaired by dissolution, redeposition, detachment, agglomeration Ir species. Here we present a ripening-induced embedding strategy that securely embeds in cerium oxide support. Cryogenic electron tomography all-atom kinetic Monte...
Using density functional theory, we have studied the interactions between pyridine (Py) and coinage metals (silver, copper, gold) as well transition metal platinum. We present here a detailed analysis of influence chemical enhancement effects on SERS signals. analyze differential Raman scattering cross sections a1 vibrational modes related to Py. The results show that relative intensities spectra depend strongly binding interaction Py active centers, electronic property materials, incident...
We have rationally synthesized and optimized catalytic nanoparticles consisting of a gold core, covered by palladium shell, onto which platinum clusters are deposited (Au@Pd@Pt NPs). The amount Pt Pd used is extremely small, yet they show unusually high activity for electrooxidation formic acid. structure has only 2 atomic layers half-monolayer equivalent (θPt ≈ 0.5) but further increase in the loading or will actually reduce activity, inferring that synergistic effect exists between three...
Under the local plasmonic excitation, Raman images of a single molecule can now reach sub-nanometer resolution. We report here theoretical description interaction between and highly confined field. It is shown that when spatial distribution field comparable with size molecule, optical transition matrix becomes to be dependent on position field, resulting in spatially resolved image molecule. found resonant reflects electronic density In combination first principles calculations, simulated...
Graphene oxide (GO) is an attractive alternative for large-scale production of graphene, but its general structure still under debate due to complicated nonstoichiometric nature. Here we perform a set femtosecond pump–probe experiments on as-synthesized GO extrapolate structural information in situ. Remarkably, it observed that, these highly oxidized samples, the ultrafast graphene-like dynamics intrinsic pristine graphene completely dominant over wide energy region and can be modified by...
Rare earth ion (RE3+)-doped inorganic CsPbX3 (X = Cl or Cl/Br) nanocrystals have been presented as promising materials for applications in solar-energy-conversion technology. An extremely efficient sensitization of Yb3+ luminescence CsPbCl3 nanoparticles (NCs) was very recently demonstrated where quantum cutting is responsible the performance photoluminescence yields over 100% (T. J. Milstein, et al. Nano Letters 2018, 18, 3792). In present work, based on cubic phase perovskite, we seek to...
Determining structural transformations of single molecules (SMs) is an important fundamental scientific endeavor. Optical spectroscopies are the dominant tools used to unravel physical and chemical features individual have substantially contributed surface science biotechnology. In particular, Raman spectroscopy can identify reaction intermediates reveal underlying mechanisms; however, SM experiments subject intrinsically weak signal intensities considerable attenuation within spectral...
On-surface acetylenic homocoupling has been proposed to construct carbon nanostructures featuring sp hybridization. However, the efficiency of linear coupling is far from satisfactory, often resulting in undesired enyne products or cyclotrimerization due lack strategies enhance chemical selectivity. Herein, we inspect reaction polarized terminal alkynes (TAs) on Au(111) with bond-resolved scanning probe microscopy. The replacement benzene pyridine moieties significantly prohibits pathway and...
The observed surface-enhanced Raman scattering (SERS) spectra of water adsorbed on metal film electrodes silver, gold, and platinum nanoparticles were used to infer interfacial structures the basis change electrochemical vibrational Stark tuning rates relative intensity stretching bending modes. To explain increase ratio vibrations at very negative potential region, density functional theory calculations provide conceptual model. specific enhancement effect for mode was closely associated...
We present a general theory to model the spatially resolved non-resonant Raman images of molecules. It is predicted that vibrational motions different modes can be fully visualized in real space by tip-enhanced scattering. As an example, water clusters were simulated combining new and first-principles calculations. Each individual normal mode gives rise its own distinct image, which resembles expected atoms very well. The characteristics intermolecular vibrations supermolecules could also...
Kinetics as the link between atomic scale properties and macroscopic functionalities is indispensable in describing surface chemical reactions computation-based rational design of catalysts. Kinetic Monte Carlo (KMC) on explicit lattice can resolve events taking place catalytic surfaces at level. It explicitly account for spatial correlations due to lateral interactions among adsorbates, which have been proved significantly affect reactions. However, disparity time scales various processes...
Both a linear OER activity trend that reaches an ideal 0 V overpotential and new volcano ORR with the apex around 1.23 limiting potential are associated our dual-active-site designs.
Abstract The global demand for lactic acid (LA) is increasing due to its successful application as monomer the manufacture of bioplastics. Although N‐heterocyclic carbene (NHC) iridium complexes are promising molecular catalysts LA synthesis, their instabilities have hindered utilization especially in commercial applications. Here, we report that a porous self‐supported NHC‐iridium coordination polymer can efficiently prevent clusterization corresponding NHC‐Ir molecules and function solid...
Binding interactions and Raman spectra of water in hydrogen-bonded anionic complexes have been studied by using the hybrid density functional theory method (B3LYP) ab initio (MP2) method. In order to explore influence hydrogen bond effect on intensities water, model complexes, such as negatively charged clusters ((H2O)n-, n = 2 3), water···halide anions (H2O···X-, X F, Cl, Br, I), water−metal atom (H2O···M-, M Cu, Ag, Au), employed present calculations. These contained different types bonds,...
In heterogeneous catalysis, characterization of metal interfaces bimetallic catalysts is a crucial step to elucidate the catalytic performance and key develop advanced catalysts. However, analytical techniques such as X-ray photoelectron spectroscopy can only work in vacuum conditions are difficult use for situ analysis. Here, we present efficient convenient core–shell nanoparticle-enhanced Raman explore electronic structures (Au@Pd Au@Pt NPs) by varying shell thickness. The experimental...
The rational design and applications of plasmon-mediated chemical reactions (PMCRs) are fundamentally determined by an understanding photon-electron-molecule interactions. However, the current PMCR plasmon-decayed hot electron-mediated remains implicit, since there has not been a single measurement both hot-electron transfer molecular transformation following photon excitation. Therefore, we invented method called microphotoelectrochemical surface-enhanced Raman spectroscopy (μPEC-SERS) that...
High-sensitivity and wide-frequency attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) is highly demanded in unraveling electrocatalytic processes at the molecular level. In this work, an situ ATR-SEIRAS technique incorporating a micromachined Si wafer window, p-polarized radiation, isotope labeling extended to revisit acetaldehyde oxidation reaction (AOR) on Pt electrode acidic medium. New spectral features fingerprint region are detected, including...