A5100351549- Electrocatalysts for Energy Conversion
- Nanoporous metals and alloys
- Supercapacitor Materials and Fabrication
- Catalytic Processes in Materials Science
- Fuel Cells and Related Materials
- High-Temperature Coating Behaviors
- Metal and Thin Film Mechanics
- Nanomaterials for catalytic reactions
- Intermetallics and Advanced Alloy Properties
- Railway Engineering and Dynamics
- Corrosion Behavior and Inhibition
- Mineralogy and Gemology Studies
- Nanocluster Synthesis and Applications
- Titanium Alloys Microstructure and Properties
- Reconstructive Facial Surgery Techniques
- Machine Learning in Materials Science
- Hydrogen embrittlement and corrosion behaviors in metals
- Cellular and Composite Structures
- Concrete Corrosion and Durability
- Metallic Glasses and Amorphous Alloys
- Aluminum Alloys Composites Properties
- Transportation Safety and Impact Analysis
- Adhesion, Friction, and Surface Interactions
- High Entropy Alloys Studies
- Advanced Photocatalysis Techniques
University of Science and Technology Beijing
2019-2025
Institute of Solid State Physics
2002
Abstract A grand challenge for proton exchange membrane electrolyzers is the rational design of oxygen evolution reaction electrocatalysts to balance activity and stability. Here, we report a support-stabilized catalyst, activated ~200 nm-depth IrW nanochannel that achieves current density 2 cm −2 at an overpotential only ~497 mV maintains ultrastable gas 100 mA least 800 h with negligible degradation rate ~4 μV −1 . Structure analyses combined theoretical calculations indicate support...
Hydrogen evolution reaction (HER) in alkaline media urgently requires electrocatalysts concurrently possessing excellent activity, flexible free-standing capability, and low cost. A honeycombed nanoporous/glassy sandwich structure fabricated through dealloying metallic glass (MG) is reported. This hybrid shows outstanding HER performance with a very small overpotential of 37 mV at 10 mA cm-2 Tafel slope 30 dec-1 media, outperforming commercial Pt/C. By alloying 3 at% Pt into the MG...
Abstract Achieving a porous architecture with multiple‐length scales and utilizing the synergetic effects of multicomponent chemicals bring up new opportunities for further improving electrocatalytic performance nanocatalysts. Herein, synthesis self‐supported hierarchical electrocatalyst based on high‐entropy alloy (HEA) containing multiple transitional metals via physical metallurgy dealloying strategies is reported. Microscale phase separation nanoscale spinodal decomposition are modulated...
Abstract The development of efficient, robust, and cost‐effective electrocatalysts remains a significant challenge for practical water electrolysis. Here, metallic glass (MG)‐based catalyst with surface‐enriched Ir Pt‐alloyed active sites, demonstrating superior electrocatalytic performance, is reported. dealloyed catalyst, characterized by an Pt‐rich honeycombed nanoporous surface interior flexible MG substrate, can directly serve as bifunctional electrode, enabling efficient hydrogen...
Abstract Proton exchange membrane (PEM) water electrolysis presents considerable advantages in green hydrogen production. Nevertheless, oxygen evolution reaction (OER) catalysts PEM currently encounter several pressing challenges, including high noble metal loading, low mass activity, and inadequate durability, which impede their practical application commercialization. Here we report a self-constructed layered catalyst for acidic OER by directly using an Ir–Ta-based metallic glass as the...
A highly active interface is extremely critical for the catalytic efficiency of an electrocatalyst; however, facilely tailoring its atomic packing characteristics remains challenging. Herein, a simple yet effective strategy reported to obtain copious high-energy steps at via controlling solidification behavior glass-forming metallic liquids. By adjusting chemical composition and cooling rate, faceted FeNi3 nanocrystals are in situ formed FeNiB glass (MG) matrix, leading creation...
Immiscible nanoporous binary Cu–Ag (NPCA) alloys with customizable microstructures and excellent SERS performance have been developed by dealloying metallic glasses.
Developing low-Pt oxygen reduction reaction (ORR) catalysts with high efficiency and robustness is critical for practical fuel cells. The most advanced ORR either feature percentages of Pt (>70 at.%) or exhibit poor durability when reducing loading. Herein, a multicomponent solid-solution
A physical-metallurgy-based structural design strategy to develop self-supported nanoporous alloy catalysts for efficient hydrogen evolution reaction with a core–shell-like structure is reported in this work.
We study experimentally the temperature spectra of internal friction (IF) and relative dynamic modulus (RDM) in a foamed Zn-Al eutectoid alloy. The specimens with macroscopic pores (0.5-1.0 mm) were prepared an air pressure infiltration process. damping behaviour alloy is characterized by IF. IF RDM measurements at maximum surface shear strain 20×10-6 have been made using multi-function apparatus frequencies 0.5, 1.0 3.0 Hz from room to equilibrium isotherm 277 °C, while continuously...
The existing palm vein recognition equipment cannot fully illuminate the at near end (30 mm), and illumination is low far (120 it challenging for poor images to meet financial grade biometric accuracy requirements. This due specification limitation of lighting system components. We propose a compact rectangular-FOI infrared palm-print with high uniformity efficiency. ultra-short-distance mm) solution achieved 200% increase in efficiency, illuminance over 60% 90% end. have developed novel LED...
The alexandrite effect is a pivotal optical phenomenon in gemmology, evident several notable gemstones. However, the manifestation of this apatite from Kazakhstan stands out as both rare and highly sought after. This displays yellowish-green hue daylight transitions to pinkish-orange shade under incandescent lighting. research involved analyzing apatite’s chemical composition using LA-ICP-MS, addition obtaining its infrared, Raman, UV-Vis, fluorescence spectra. From elemental assessment...