A5100630423- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Catalytic Processes in Materials Science
- Fuel Cells and Related Materials
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Electronic and Structural Properties of Oxides
- Ferroelectric and Piezoelectric Materials
- Electron and X-Ray Spectroscopy Techniques
- Semiconductor materials and devices
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Advanced Electron Microscopy Techniques and Applications
- Advanced Photocatalysis Techniques
- Extraction and Separation Processes
- Multiferroics and related materials
- Magnetic and transport properties of perovskites and related materials
- Quantum Dots Synthesis And Properties
- Catalysis and Hydrodesulfurization Studies
- Electrochemical Analysis and Applications
- CO2 Reduction Techniques and Catalysts
- Advanced Memory and Neural Computing
- Catalysis and Oxidation Reactions
- Copper-based nanomaterials and applications
- Microwave Dielectric Ceramics Synthesis
National Laboratory for Superconductivity
2019-2025
Institute of Physics
2003-2025
Chinese Academy of Sciences
2003-2025
Qingdao University of Science and Technology
2023-2025
Czech Academy of Sciences, Institute of Physics
2020-2025
Shenzhen University
2020-2024
Tianjin University
2012-2024
University of Chinese Academy of Sciences
2021-2024
Shanghai University
2024
University of Science and Technology of China
2024
Activated microwave-exfoliated graphite oxide combined with an ionic liquid can be used to make enhanced capacitor.
An activity lift for platinum Platinum is an excellent but expensive catalyst the oxygen reduction reaction (ORR), which critical fuel cells. Alloying with other metals can create shells of on cores less metals, increases its surface exposure, and compressive strain in layer also boost (see Perspective by Stephens et al. ). Bu produced nanoplates—platinum-lead covered shells—that were tensile strain. These nanoplates had high stable ORR activity, theory suggests arises from optimizing...
It remains a grand challenge to replace platinum group metal (PGM) catalysts with earth-abundant materials for the oxygen reduction reaction (ORR) in acidic media, which is crucial large-scale deployment of proton exchange membrane fuel cells (PEMFCs). Here, we report high-performance atomic Fe catalyst derived from chemically Fe-doped zeolitic imidazolate frameworks (ZIFs) by directly bonding ions ligands within 3D frameworks. Although ZIF was identified as promising precursor, new...
Disorderly Flow Lithium batteries are becoming ever more important in society. While their application used to be confined portable electronics, they now the enabling technology for electric vehicles and grid storage renewables. Generally, flow of lithium ions into out battery electrodes is thought require ordered materials. Lee et al. (p. 519 , published online 9 January) a combination experimental work computations identify disordered electrode materials with high Li diffusion. The...
Due to the Fenton reaction, presence of Fe and peroxide in electrodes generates free radicals causing serious degradation organic ionomer membrane. Pt-free Fe-free cathode catalysts therefore are urgently needed for durable inexpensive proton exchange membrane fuel cells (PEMFCs). Herein, a high-performance nitrogen-coordinated single Co atom catalyst is derived from Co-doped metal-organic frameworks (MOFs) through one-step thermal activation. Aberration-corrected electron microscopy...
High-performance electrocatalytic CO<sub>2</sub> reduction to CO using Ni single-atom catalyst in an anion membrane electrode assembly.
Platinum group metal (PGM)-free catalysts for oxygen reduction reaction are essential affordable fuel cells.
Abstract Despite intense research in past decades, the lack of high-performance catalysts for fuel cell reactions remains a challenge realizing technologies transportation applications. Here we report facile strategy synthesizing hierarchical platinum-cobalt nanowires with high-index, platinum-rich facets and ordered intermetallic structure. These structural features enable unprecedented performance oxygen reduction alcohol oxidation reactions. The specific/mass activities reaction are...
Abstract The great interest in fuel cells inspires a substantial amount of research on nonprecious metal catalysts as alternatives to Pt‐based oxygen reduction reaction (ORR) electrocatalysts. In this work, bimodal template‐based synthesis strategies are proposed for the scalable preparation hierarchically porous M–N–C (M = Fe or Co) single‐atom electrocatalysts featured with active and robust MN 2 moieties. Multiscale tuning regarding increasing number sites boosting intrinsic activity each...
There exist tremendous needs for sustainable storage solutions intermittent renewable energy sources, such as solar and wind energy. Thus, systems based on Earth‐abundant elements deserve much attention. Potassium‐ion batteries represent a promising candidate because of the abundance potassium resources. As choices anodes, graphite exhibits encouraging potassium‐ion properties; however, it suffers limited rate capability poor cycling stability. Here, nongraphitic carbons K‐ion anodes with...
Materials that undergo a conversion reaction with lithium (e.g., metal fluorides MF(2): M = Fe, Cu, ...) often accommodate more than one Li atom per transition-metal cation, and are promising candidates for high-capacity cathodes ion batteries. However, little is known about the mechanisms involved in process, origins of large polarization during electrochemical cycling, why some materials reversible FeF(2)) while others not CuF(2)). In this study, we investigated binary fluorides, FeF(2)...
Black phosphorus (BP) has attracted significant interest as a monolayer or few-layer material with extraordinary electrical and optoelectronic properties. However, degradation in air other environments is an unresolved issue that may limit future applications. In particular the role of different ambient species remained controversial. Here, we report systematic experiments combined ab-initio calculations address effects oxygen water BP. Our results show BP rapidly degrades whenever present,...
Fully ordered face-centered tetragonal (fct) FePt nanoparticles (NPs) are synthesized by thermal annealing of the MgO-coated dumbbell-like FePt-Fe3O4 NPs followed acid washing to remove MgO. These fct-FePt show strong ferromagnetism with room temperature coercivity reaching 33 kOe. They serve as a robust electrocatalyst for oxygen reduction reaction (ORR) in 0.1 M HClO4 and hydrogen evolution (HER) 0.5 H2SO4 much enhanced activity (the most active fct-structured alloy NP catalyst ever...
We investigated electron-beam lithography with an aberration-corrected scanning transmission electron microscope. achieved 2 nm isolated feature size and 5 half-pitch in hydrogen silsesquioxane resist. also analyzed the resolution limits of this technique by measuring point-spread function at 200 keV. Furthermore, we measured energy loss resist using electron-energy-loss spectroscopy.
Controlling nanoparticle (NP) surface strain, i.e. compression (or stretch) of atoms, is an important approach to tune NP chemistry and optimize catalysis for chemical reactions. Here we show that Pt strain in the core/shell FePt/Pt NPs with three atomic layers can be rationally tuned via core structural transition from cubic solid solution [denoted as face centered (fcc)] structure tetragonal intermetallic (fct)] structure. The high activity observed fct-FePt/Pt oxygen reduction reaction...
We report in this article a detailed study on how to stabilize first-row transition metal (M) an intermetallic L10-MPt alloy nanoparticle (NP) structure and surround the with atomic layer of Pt enhance electrocatalysis for oxygen reduction reaction (ORR) fuel cell operation conditions. Using 8 nm FePt NPs as example, we demonstrate that Fe can be stabilized more efficiently core/shell structured L10-FePt/Pt 5 Å shell. The presence core induces desired compression thin shell, especially two...
Ideal solar-to-fuel photocatalysts must effectively harvest sunlight to generate significant quantities of long-lived charge carriers necessary for chemical reactions. Here we demonstrate the merits augmenting traditional photoelectrochemical cells with plasmonic nanoparticles satisfy these daunting photocatalytic requirements. Electrochemical techniques were employed elucidate mechanics plasmon-mediated electron transfer within Au/TiO2 heterostructures under visible-light (λ>515 nm)...
A facile approach to the composition-controlled synthesis of monodisperse 2.2 nm AgPd alloy nanoparticles (NPs) is reported. The NPs are highly active and durable catalysts for dehydrogenation formic acid. study proves unique in using alloying effects enhance catalytic activity hydrogen generation from acid (see picture). Formic (FA, HCOOH) a common small organic with melting point 8.4 °C boiling 100.8 °C. It can undergo reaction, HCOOH→H2+CO2, releasing H2 that will be important...
Highly ordered Pt alloy structures are proven effective to improve their catalytic activity and stability for the oxygen reduction reaction (ORR) proton exchange membrane fuel cells. Here, we report a new approach preparing Pt3Co intermetallic nanoparticles through facile thermal treatment of supported on Co-doped metal-organic-framework (MOF)-derived carbon. In particular, atomically dispersed Co sites, which originally embedded into MOF-derived carbon, diffuse nanocrystals form structures....
Water reduction under two different visible-light ranges (λ > 400 nm and λ 435 nm) was investigated in gold-loaded titanium dioxide (Au-TiO2) heterostructures with sizes of Au nanoparticles (NPs). Our study clearly demonstrates the essential role played by NP size plasmon-driven H2O reveals distinct mechanisms to clarify photocatalytic activity excitation conditions. The governs efficiency plasmon-mediated electron transfer plays a critical determining potentials electrons transferred TiO2...
We use transmission electron microscopy (TEM) to investigate the evolution of surface structure LixNi0.8Co0.15Al0.05O2 cathode materials (NCA) as a function extent first charge at room temperature using combination high-resolution (HREM) imaging, selected area diffraction (SAED), and energy loss spectroscopy (EELS). It was found that changes from layered (space group R3̅m) disordered spinel (Fd3̅m), eventually rock-salt (Fm3̅m), these are more substantial increases. EELS indicates crystal...