A5060624342- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical Analysis and Applications
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
- Spectroscopy and Quantum Chemical Studies
- Surface Modification and Superhydrophobicity
- Quantum Dots Synthesis And Properties
- Electrospun Nanofibers in Biomedical Applications
- Advanced Sensor and Energy Harvesting Materials
- Photochemistry and Electron Transfer Studies
- Molecular Junctions and Nanostructures
- Nanocluster Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- MXene and MAX Phase Materials
- Photoreceptor and optogenetics research
- Graphene research and applications
- Copper-based nanomaterials and applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Conducting polymers and applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced Nanomaterials in Catalysis
- Plasma Applications and Diagnostics
ShanghaiTech University
2020-2025
Harbin Institute of Technology
2011-2025
Huanghe Science and Technology College
2025
Donghua University
2025
Shenzhen Institutes of Advanced Technology
2018-2024
Chinese Academy of Sciences
2018-2024
Shanghai Institute of Ceramics
2022-2024
Changchun Institute of Applied Chemistry
2023-2024
University of Science and Technology of China
2023-2024
University of Chinese Academy of Sciences
2019-2024
Surface-enhanced Raman spectroscopy (SERS) has long been considered as a noninvasive technique that can obtain the fingerprint vibrational information of surface species. We demonstrated in this paper laser with power level to be low traditional SERS measurement already lead significant reaction. para-Aminothiophenol, an important probe molecule SERS, was found oxidized form 4,4'-dimercaptoazobenzene (DMAB) on roughened silver during measurement. The assumption confirmed experimentally by...
p-Mercaptoaniline (pMA, it is often called p-aminothiophenol (PATP)) can form self-assembled monolayer (SAM) through its thiol group on metal surfaces. It also an important surface probe molecule in the surface-enhanced Raman spectroscopy (SERS). More recently, pMA has been used molecular electronics as a single-molecule conductance wire to link two nanoscale leads, constructing junction. When adsorbs these nanostructures and nanogaps, there exhibit strongly detectable signals of...
Abstract Understanding the atomistic details of how platinum surfaces are oxidized under electrochemical conditions is importance for many devices such as fuel cells and electrolysers. Here we use in situ shell-isolated nanoparticle-enhanced Raman spectroscopy to identify intermediate stages oxidation Pt(111) Pt(100) single crystals perchloric acid. Density functional theory calculations were carried out assist assigning experimental bands by simulating vibrational frequencies possible...
Plasmon-mediated chemical reactions (PMCRs) constitute a vibrant research field, advancing such goals as using sunlight to convert abundant precursors CO2 and water useful fuels chemicals. A key question in this burgeoning field which has not, yet, been fully resolved, relates the precise mechanism through energy absorbed plasmonic excitation, ultimately drives reactions. Among multiple processes proposed, two have risen forefront: plasmon-increased temperature generation of energetic charge...
Fe-N-C electrocatalysts have been demonstrated to be the most promising substitutes for benchmark Pt/C catalysts oxygen reduction reaction (ORR). Herein, we report that N-doped carbon materials with trace amounts of iron (0-0.08 wt. %) show excellent ORR activity and durability comparable even superior those in both alkaline acidic media without significant contribution by metal sites. Such an (denoted as N-HPCs) features a hollow hierarchically porous architecture, more importantly,...
Abstract Enhancing the durability of catalysts is critical significance to industrialize green hydrogen production. Herein, a novel active site in situ refreshing strategy proposed and demonstrated fabricate highly ultra‐durable evolution reaction (HER) electro‐catalytic material by HER activation. Briefly, composite catalytic synthesized, which features Ni(PO 3 ) 2 sites being embedded inside amorphous Mo compound matrix (named NiMoO‐P). The undergoes gradual dissolution during followed...
Taking advantage of the unique capacity surface plasmon resonance, plasmon-enhanced heterogeneous catalysis has recently come into focus as a promising technique for high performance light-energy conversion. This work performs theoretical study on reaction mechanism conversions p-aminothiophenol (PATP) and p-nitrothiophenol (PNTP) to aromatic azo species, p,p'-dimercaptoazobenzene (DMAB). In absence O2 or H2, plasmon-driven photocatalysis (hot electron-hole reactions) is major channel....
When p-aminothiophenol (PATP) is used as a probe molecule and adsorbs on silver gold nanogaps, significant change of relative SERS intensities can be observed. Our DFT calculations show that surface photocatalytic coupling reactions yield new species p,p′-dimercaptoazobenzene (DMAB) causing the in spectra.
ConspectusSurface plasmons (SPs) originating from the collective oscillation of conduction electrons in nanostructured metals (Au, Ag, Cu, etc.) can redistribute not only electromagnetic fields but also excited carriers (electrons and holes) heat energy time space. Therefore, SPs engage a variety processes, such as molecular spectroscopy chemical reaction. Recently, plenty demonstrations have made plasmon-mediated reactions (PMCRs) very active research field make it promising approach to...
Aiming to deeply understand the electrocatalytic mechanism of silver on reduction benzyl chloride, we carried out an in situ electrochemical surface-enhanced Raman spectroscopic study characterize various surface species different electrode potential regions. A further analysis with DFT calculation reveals that radical and its anionic derivate bonded a are key intermediates, implying pathway could drastically differ from outer sphere concerted electron at inert electrodes.
We propose that aromatic nitro and amine compounds undergo photochemical reductive oxidative coupling, respectively, to specifically produce azobenzene derivatives which exhibit characteristic Raman signals related the azo group. A photoinduced charge transfer model is presented explain transformations observed in para-substituted ArNO(2) ArNH(2) on nanostructured silver due surface plasmon resonance effect. Theoretical calculations show initial reaction takes place through excitation of an...
Au-seed Ag-growth nanoparticles of controllable diameter (50-100 nm), and having an ultrathin SiO(2) shell thickness (2-3 were prepared for shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS). Their morphological, optical, material properties characterized; their potential use as a versatile signal amplifier was investigated experimentally using pyridine probe molecule theoretically by the three-dimensional finite-difference time-domain (3D-FDTD) method. We show that thin 2 nm...
Among various earth-abundant and noble metal-free catalysts for oxygen reduction reaction (ORR), manganese-based oxides are promising candidates owing to the rich variety of manganese valence. Herein, an extremely facile method synthesis cubic orthorhombic phase coexisting Mn(II)O electrocatalyst as efficient ORR catalyst was explored. The obtained MnO with vacancies shows a significantly elevated catalytic activity half-wave potential (E1/2) high 0.895 V, in comparison that commercial Pt/C...
Surface plasmons (SPs) are able to promote chemical reactions through the participation of energetic charge carriers produced following decay. Using p-aminothiophenol (PATP) as a probe molecule, we used surface-enhanced Raman spectroscopy follow progress its transformation, in situ, investigate systematically role hot electrons and holes. The carrier mediated PATP oxidation was found occur even absence oxygen, greatly influenced by interface region near gold surface. observed reaction, which...
Integration of voltammetry, surface-enhanced Raman spectroscopy (SERS), and density functional theory (DFT) has allowed unraveling the mechanistic origin exceptional electrocatalytic properties silver cathodes during reduction benzyl chloride. At inert electrodes initial proceeds through a concerted direct electron transfer yielding radical as first intermediate. Conversely, at it involves an uphill preadsorption chloride onto cathode. Reduction this adduct affords species tentatively...
Experimental elucidation of the decoupling electron and proton transfer at a molecular level is essential for thoroughly understanding kinetics heterogeneous (photo)electrochemical proton-coupled water oxidation. Here we illustrate electron-transfer intermediates positively charged surface oxygenated species on Au (Au-OH+) their correlations with rate oxidation by in situ microphotoelectrochemical surface-enhanced Raman spectroscopy (SERS) ambient-pressure X-ray photoelectron spectroscopy....