A5037041246- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Catalysis and Hydrodesulfurization Studies
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Machine Learning in Materials Science
- Semiconductor materials and devices
- Electrochemical Analysis and Applications
- Thermal Expansion and Ionic Conductivity
- Supercapacitor Materials and Fabrication
- Advanced Photocatalysis Techniques
- Hydrogen Storage and Materials
- Electron and X-Ray Spectroscopy Techniques
- Transition Metal Oxide Nanomaterials
- Conducting polymers and applications
- Ferroelectric and Piezoelectric Materials
- Membrane-based Ion Separation Techniques
- Quantum Dots Synthesis And Properties
- Membrane Separation and Gas Transport
- Metal-Organic Frameworks: Synthesis and Applications
- 2D Materials and Applications
Korea Institute of Science and Technology
2016-2025
Government of the Republic of Korea
2020-2021
Seoul Institute
2021
Korea University
2019
Dankook University
2015-2016
Abstract Low-cost anion exchange membrane fuel cells have been investigated as a promising alternative to proton for the last decade. The major barriers viability of are their unsatisfactory key components—anion ionomers and membranes. Here, we present series durable poly(fluorenyl aryl piperidinium) membranes where possess high OH − conductivity 208 mS cm −1 at 80 °C, low H 2 permeability, excellent mechanical properties (84.5 MPa TS), 2000 h ex-situ durability in 1 M NaOH while water vapor...
Abstract Nonprecious metals are promising catalysts to avoid the sluggish oxygen reduction reaction (ORR) in next‐generation regenerative fuel cells or metal–air batteries. Therefore, development of nonprecious metal for ORR is highly desirable. Herein, precise tuning atomic ratio Fe and Co encapsulated melamine‐derived nitrogen‐rich graphitic tube (NGT) reported. The 1.08 3.34 hybrid with metalnitrogen bonds ( 1 : @NGT) shows remarkable catalytic activities (80 mV higher onset potential 50...
ORR activity of Fe, Si, and N co-doped carbons (FeSiNCs) is first reported that DFT calculations reveal the origin FeSiNC, presenting excellent single-cell performances in Zn–air battery AEMFC.
Polycrystalline alloy electrodes of Pt with alkaline earth metals (Ca, Sr, and Ba) have been shown to exhibit enhanced electrocatalytic performance for oxygen reduction reaction (ORR) relative electrodes. The large oxophilicity the makes it challenging synthesize such alloys. Here, we a carbon-supported platinum–magnesium (PtMg) catalytic activity durability ORR in both half-cell single cell when compared state-of-the-art Pt/C catalyst. Employing metallic Mg powder as precursor can overcome...
Abstract Recently, nonnoble‐metal catalysts such as a metal coordinated to nitrogen doped in carbon matrix have been reported exhibit superior oxygen reduction reaction (ORR) activity alkaline media. In this work, Co 2 P nanoparticles supported on heteroatom‐doped (NBSCP) are developed with an eco‐friendly synthesis method using bean sprouts. NBSCP can be easily synthesized through precursor absorption and carbonization at high temperature. It shows very large specific surface area various...
The recent development of ultrathin anion exchange membranes and optimization their operating conditions have significantly enhanced the performance alkaline-membrane fuel cells (AMFCs); however, effects membrane/electrode interface structure on AMFC not been seriously investigated thus far. Herein, we report a high-performance system with novel design. Commercially available are modified in form well-aligned line arrays both anode cathode sides by means solvent-assisted molding technique...
For increasing the active metal sites densities on M–N–C catalyst facile strategy was presented through use of dual such as single atomic Fe–N<italic>x</italic> species and nanosized Fe<sub>3</sub>C with ∼2 nm.
We uncover the secrets to controlling carbon shell structure on surface of metal nanoparticles at sub-nm scale improve performance and durability fuel cells.
Biomass is the ideal precursor for fabricating oxygen reduction reaction (ORR) electrocatalysts due to its large-scale and low-cost production, as well renewability. Among various forms of biomass, especially waste pig blood a sustainable synthesis functional electrocatalysts. However, proteins or metal substances present in act impurities impede electrocatalytic performance, preventing direct use an electrocatalyst. Herein, we report successful hierarchical 2D porous Fe single-atom...
Abstract Rational design of catalytic nanomaterials is essential for developing high‐performance fuel cell catalysts. However, structural degradation and elemental dissolution during operation pose significant challenges to achieving long‐term stability. Herein, the development multi‐grained NiPt nanocatalysts featuring an atomically ordered Ni 3 Pt 5 phase within intragrain reported. Ultrasound‐assisted synthesis facilitates atomic transposition by supplying sufficient diffusion energy...
Electrochemical water splitting is one of the most promising systems by which to store energy produced from sustainable sources, such as solar and wind energy. Designing robust stable electrocatalysts urgently needed because relatively sluggish kinetics anodic reaction, i.e. oxygen evolution reaction (OER). In this study, we investigate anomalous in situ activation behaviour carbon-supported Ni2P nanoparticles (Ni2P/C) during OER catalysis alkaline media. The activated Ni2P/C shows an...
Despite considerable development in the field of single-atom catalysts (SACs) on carbon-based materials, reported strategies for synthesizing SACs generally rely top-down approaches, which hinder achieving both simple and universal synthesis routes that are simultaneously applicable to various metals nanocarbons. Here, a strategy fabricating nanocarbon based-SACs using flash bottom-up arc discharge method mitigate these issues is reported. The ionization elements their recombination process...
Interface engineering based on the design and fabrication of micro/nanostructures has received much attention as an effective way to improve performance polymer electrolyte membrane (PEM) fuel cells while using same materials quantity. Herein, we fabricated spatially hole-array patterned PEMs with different hole depths both plasma etching process a polymeric stencil 40 μm-sized apertures. This novel technological approach exhibited high pattern fidelity over large area controllability in...