A5100673667- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Electrochemical Analysis and Applications
- Fuel Cells and Related Materials
- Catalytic Processes in Materials Science
- Advanced battery technologies research
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- CO2 Reduction Techniques and Catalysts
- Extraction and Separation Processes
- Molecular Junctions and Nanostructures
- Ionic liquids properties and applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Conducting polymers and applications
- Gas Sensing Nanomaterials and Sensors
- Catalysis and Oxidation Reactions
- Advanced Photocatalysis Techniques
- nanoparticles nucleation surface interactions
- Nanomaterials for catalytic reactions
- Ammonia Synthesis and Nitrogen Reduction
- Spectroscopy and Quantum Chemical Studies
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Semiconductor materials and devices
Xiamen University
2016-2025
Collaborative Innovation Center of Chemistry for Energy Materials
2016-2025
Chongqing University
2022-2025
Weifang University
2025
Tan Kah Kee Innovation Laboratory
2022-2024
National Synchrotron Radiation Laboratory
2022-2024
University of Science and Technology of China
2022-2024
Shaanxi University of Science and Technology
2024
State Key Laboratory of Chemical Engineering
2017-2023
East China University of Science and Technology
2017-2023
The shapes of noble metal nanocrystals (NCs) are usually defined by polyhedra that enclosed {111} and {100} facets, such as cubes, tetrahedra, octahedra. Platinum NCs unusual tetrahexahedral (THH) shape were prepared at high yield an electrochemical treatment Pt nanospheres supported on glassy carbon a square-wave potential. single-crystal THH NC is 24 high-index facets {730}, {210}, and/or {520} surfaces have large density atomic steps dangling bonds. These high-energy stable thermally (to...
High-temperature pyrolyzed FeNx/C catalyst is one of the most promising nonprecious metal electrocatalysts for oxygen reduction reaction (ORR). However, it suffers from two challenging problems: insufficient ORR activity and unclear active site structure. Herein, we report a derived poly-m-phenylenediamine (PmPDA-FeNx/C) that possesses high (11.5 A g–1 at 0.80 V vs RHE) low H2O2 yield (<1%) in acid medium. The PmPDA-FeNx/C also exhibits catalytic both oxidation H2O2. We further find not...
Nanoparticles of platinum group metals (PGM) supported on diverse substrate materials are widely used catalysts in many important fields such as modern chemical industry, petrochemical automobile exhaust purification, and fuel cells. Due to the extremely high cost rare reserve PGM earth, further improve catalytic activity, stability, utility efficiency nanoparticles is key issue relevant industrial development well challenge basic research science technology. This feature article summarizes...
Toward the pursuit of high-performance Ni2+/Co2+/Fe3+-relevant oxygen evolution reaction (OER) electrocatalysts, modulation local electronic structure active metal sites provides fundamental motif, which could be achieved either through direct modifications chemical environment or interfacial interaction with a second substrate possesses high electronegativity (typically noble Au). Herein, we report that Ni–Fe layered double hydroxide (LDH) favorably modulated strong interactions FeOOH...
Tetrahexahedral Pd nanocrystals (THH NCs) with {730} high-index facets were directly produced on a glassy carbon substrate in dilute PdCl2 solution by newly developed programmed electrodeposition method. The THH NCs, thanks to their high density of surface atomic steps, exhibit 4−6 times higher catalytic activity than commercial black catalyst toward ethanol electrooxidation alkaline solutions. This straightforward method provides promising route facile preparation high-index-faceted metal...
Fe/N/C is a promising non-Pt electrocatalyst for the oxygen reduction reaction (ORR), but its catalytic activity considerably inferior to that of Pt in acidic medium, environment polymer electrolyte membrane fuel cells (PEMFCs). An improved catalyst (denoted as Fe/N/C-SCN) derived from Fe(SCN)3, poly-m-phenylenediamine, and carbon black presented. The advantage using Fe(SCN)3 iron source obtained has high level S doping surface area, thus exhibits excellent ORR (23 A g(-1) at 0.80 V) 0.1 M...
Star performance: The shape and surface structure of star-shaped gold nanoparticles (NPs) bounded by (331) vicinal high-index facets, now synthesized for the first time, can be tuned varying water content in deep eutetic solvent. results confirm that Au NPs exhibit superior activity electrocatalytic reduction H2O2. ability to tune offers insight into structure–functionality relationships.
Abstract The development of electrocatalysts capable efficient reduction nitrate (NO 3 − ) to ammonia (NH is drawing increasing interest for the sake low carbon emission and environmental protection. Herein, we present a CuCo bimetallic catalyst able imitate bifunctional nature copper-type nitrite reductase, which could easily remove NO 2 via collaboration two active centers. Indeed, Co acts as an electron/proton donating center, while Cu facilitates x adsorption/association. bio-inspired...
Binders have been reported to play a key role in improving the cycle performance of Si anode materials lithium‐ion batteries. In this study, biopolymer guar gum (GG) is applied as binder for silicon nanoparticle (SiNP) battery first time. Due large number polar hydroxyl groups GG molecule, robust interaction between and SiNPs achieved, resulting stable during cycling. More specifically, can effectively transfer lithium ions surface, similarly polyethylene oxide solid electrolytes. When used...
Defects have been found to enhance the electrocatalytic performance of NiFe-LDH for oxygen evolution reaction (OER). Nevertheless, their specific configuration and role played in regulating surface reconstruction electrocatalysts remain ambiguous. Herein, cationic vacancy defects are generated via aprotic-solvent-solvation-induced leaking metal cations from nanosheets. DFT calculation situ Raman spectroscopic observation both reveal that as-generated tend exist as VM (M=Ni/Fe); under...
A cathode for high-rate performance lithium-ion batteries (LIBs) has been developed from a crystal habit-tuned nanoplate Li(Li0.17Ni0.25Mn0.58)O2 material, in which the proportion of (010) nanoplates (see figure) significantly increased. The results demonstrate that fraction surface is electrochemically active Li+ transportation key criterion evaluating different nanostructures potential LIB materials. Detailed facts importance to specialist readers are published as ”Supporting Information”....
Platinum nanocrystals on carbon black were synthesized by an electrochemical square-wave potential method (HIF-Pt/C, see picture). The have high-index facets and a high density of atomic steps. Thanks to this density, the catalysts exhibit at least twice activity selectivity commercial Pt/C for ethanol electrooxidation into CO2.
Abstract Binders, though often used in small doses, play a crucial role determining the electrochemical performance of lithium ion batteries with high energy density. The traditional PVDF binder, which interacts electrode materials via weak Van der Waals forces and consequently lacks necessary capabilities (e.g., suppression significant volume variations, interface maintenance etc.), could not fulfill demands Besides, extensive usage binder battery is cost‐ineffective may raise environmental...
Aimed at developing a highly active and stable non-precious metal catalyst (NPMC) for oxygen reduction reaction (ORR) in acidic proton-exchange membrane fuel cells (PEMFCs), novel NPMC was prepared by pyrolyzing composite of carbon-supported Fe-doped graphitic carbon nitride (Fe–g-C3N4@C) above 700 °C. In this paper, the influence pyrolysis temperature Fe content on ORR performance investigated. Rotating disk electrode (RDE) rotating ring-disk (RRDE) studies reveal that, with half-wave...
The electrocatalytic urea oxidation reaction (UOR) provides more economic electrons than water for various renewable energy-related systems owing to its lower thermodynamic barriers. However, it is limited by sluggish kinetics, especially CO2 desorption steps, masking energetic advantage compared with oxidation. Now, a lattice-oxygen-involved UOR mechanism on Ni4+ active sites reported that has significantly faster kinetics the conventional mechanisms. Combined DFT, 18 O isotope-labeling...
Electrochemical impedance spectra (EIS) for lithium ion insertion and deinsertion in spinel LiMn2O4 were obtained at different potentials temperatures during initial charge−discharge cycle. The results revealed that, intermediate degrees of intercalation, three semicircles appeared the Nyquist diagram. This new phenomenon has been investigated through EIS measurements as a function temperature. It found that high frequency semicircle middle to begin overlap each other above 20 °C, which...
A popular criterion that uses the ratio between peak currents of respective positive (anodic) and negative (cathodic) potential scans, If/Ib, in cyclic voltammetry methanol electro-oxidation to gauge CO-tolerance catalytic activity Pt-based electro-catalysts was revisited its inadequacy revealed by an situ surface enhanced IR study.