A5030156541- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
- Catalytic Processes in Materials Science
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Luminescence and Fluorescent Materials
- Electrochemical Analysis and Applications
- Magnetic properties of thin films
- Catalysis and Oxidation Reactions
- Supercapacitor Materials and Fabrication
- Green IT and Sustainability
- Quantum and electron transport phenomena
- Plant tissue culture and regeneration
- Solar Radiation and Photovoltaics
- Hybrid Renewable Energy Systems
- Copper-based nanomaterials and applications
- Electric Vehicles and Infrastructure
- Transportation and Mobility Innovations
- Catalysts for Methane Reforming
- Smart Grid Energy Management
- Plant responses to water stress
Seoul National University
2024-2025
Ulsan National Institute of Science and Technology
2021-2024
Pohang University of Science and Technology
2020-2023
University of Minnesota
2022-2023
Kyungpook National University
2018-2023
Twin Cities Orthopedics
2022
Korea Advanced Institute of Science and Technology
2021
Electronics and Telecommunications Research Institute
2021
Government of the Republic of Korea
2020-2021
Developing efficient and inexpensive electrocatalysts for the hydrogen evolution reaction (HER) in alkaline water electrolysis plays a key role renewable energy technology. The slow kinetics of HER solutions, however, has hampered advances high-performance production. Herein, we investigated trends activity with respect to binding energies Ni-based thin film catalysts by incorporating series oxophilic transition metal atoms. It was found that doping atoms enables modulation abilities...
High-energy and long cycle lithium-sulfur (Li-S) pouch cells are limited by the insufficient capacities stabilities of their cathodes under practical electrolyte/sulfur (E/S), electrolyte/capacity (E/C), negative/positive (N/P) ratios. Herein, an advanced cathode comprising highly active Fe single-atom catalysts (SACs) is reported to form 320.2 W h kg-1 multistacked Li-S with total capacity ≈1 A level, satisfying low E/S (3.0), E/C (2.8), N/P (2.3) ratios high sulfur loadings (8.4 mg cm-2 )....
Designing an electrocatalyst that simultaneously satisfies high catalytic activity and surface stability is essential for realizing high-performance lithium-sulfur (Li||S) batteries. Here, we propose advanced by constructing a thin protective layer (PCL) on the of metal nanoparticle catalysts. This few atomic thicknesses PCL composed pyridinic N embedded graphitic carbon allows electrons to transfer from N, resulting in optimized p-orbital level favorable highly active conversion reaction...
Abstract Developing high‐efficiency and low‐cost oxygen‐evolving electrodes in anion exchange membrane (AEM) water electrolysis technology is one of the major challenges. Herein, it demonstrated that surface corrosion a conventional Ni foam electrode presence Fe 3+ V cations can transform into an with high catalytic performance for oxygen evolution reaction (OER). The corroded consists ternary NiFeV layered double hydroxide (LDH) nanosheet array supported on surface. This LDH achieves OER...
2D Ni-based transition metal phosphide catalysts could exhibit improved overall water splitting performance through vanadium doping which increases the electrical conductivity and controls catalyst's adsorption energy with water.
A strategic approach has been proposed for designing robust, high-performing oxygen evolution reaction (OER) catalysts tailored saline water splitting. By employing a density functional theory (DFT)-based computational screening process, set of promising dopants were identified from range 26 3d to 5d transition metals, with the aim enhancing activity and resilience catalysts. The methodology was 3-fold, encompassing evaluations OER energetics, chlorine (ClER) chloride-corrosion energetics....
Abstract Mo 2 C is an excellent electrocatalyst for hydrogen evolution reaction (HER). However, a poor oxygen (OER). Herein, two different elements, namely Co and Fe, are incorporated in that, therefore, has finely tuned electronic structure, which not achievable by incorporation of any one the metals. Consequently, resulting 0.8 Fe 0.2 –Mo C‐80 displayed OER catalytic performance, evidenced low overpotential 214.0 (and 246.5) mV to attain current density 10 50) mA cm −2 , ultralow Tafel...
One-step methane-to-methanol conversion is a "dream reaction" for chemists. In this Letter, continuous direct of methane into methanol with steam under mild conditions using Cu(II)-exchanged mordenite reported. The production rate depended on the Si/Al ratio, Cu/Al presence Brønsted acid sites, and O2 concentration in feed. Cu-H-mordenite Cu-Na-mordenite showed comparable rates, but former provided higher selectivity. At given gave volcano plot as function selectivity decreased increasing...
Abstract Single‐atom nanozymes (SAzymes) constitute a promising category of enzyme‐mimicking materials with outstanding catalytic performance. The performance SAzymes improves through modification the coordination environments around metal center. However, turnover rates SAzymes, which are key measures effectiveness active site modifications, remain lower than those natural enzymes, especially in peroxidase‐reactions. Here, first and second shell tuning strategy that yields structures...
Abstract Alkaline water electrolysis (AWE) systems offer a cost‐effective and scalable approach for large‐scale hydrogen production using renewable energy sources. However, their susceptibility to load fluctuations, particularly the reverse‐current (RC) phenomenon during shutdown events, poses significant challenge long‐term stability scalability of these systems. Herein, catalytic enhancing RC tolerance in AWE by Pb‐decorated Ni cathode catalysts (Pb/Ni) is introduced. The oxidation Pb/Ni...
Altermagnets exhibit characteristics akin to antiferromagnets, with spin-split anisotropic bands in momentum space. RuO$_2$ has been considered as a prototype altermagnet; however, recent reports have questioned altermagnetic ground state this material. In study, we provide direct experimental evidence of films by demonstrating spin-dependent tunneling magnetoresistance (TMR) RuO$_2$-based magnetic tunnel junctions. Our results show the spin-splitted band structure RuO$_2$, observed TMR...
Electrocatalytic water splitting, which is an interface-dominated process, can be significantly accelerated by increasing the number of front-line surface active sites (NA ) electrocatalyst. In this study, a unique method used for NA converting smooth ultrathin atomic-layer-deposited nanoshells electrocatalysts into nano-roughened shell layers using controlled anion-exchange reaction (AER). The coarse thin present abundant sites, are generated owing to inherent unit-cell volume mismatch...
The rapid transport of alkali ions in electrodes is a long-time dream for fast-charging batteries. Though electrode nanostructuring has increased the rate-capability, its practical use limited because low tap density and severe irreversible reactions. Therefore, development strategy to design micron-sized without significant importance. Herein, simple versatile accelerate ion diffusion behavior reported. It demonstrated that rate K+ significantly improved at hetero-interface between...
The development of covalent organic frameworks (COFs) with efficient charge transport is immense interest for applications in optoelectronic devices. To enhance COF properties, electroactive building blocks and dopants can be used to induce extended conduction channels. However, understanding their intricate interplay remains challenging. We designed synthesized a tailor-made structure hexaazatriphenylene (HAT) core units planar dioxin (D) linkages, denoted as HD-COF. With the support...
Abstract Developing new linkage‐based covalent organic frameworks (COFs) is one of the major topics in reticular chemistry. Electrically conductive COFs have enabled applications energy storage and electrochemical catalysis, which are not feasible using insulating COFs. Despite significant advances, construction chemically stable by formation linkages remains relatively unexplored challenging. Here we report solvent‐ catalyst‐free synthesis a two‐dimensional aza‐bridged bis(phenanthroline)...
Abiotic stress induce the production of 1-aminocyclopropane-1-carboxylate (ACC), precursor ethylene by activating enzyme ACC synthase. There are twelve synthase genes reported in genome Arabidopsis, and 11 (ACS11) gene encodes a polypeptide that is functional; however, its involvement biosynthesis response to abiotic stresses remains unclear. We evaluated effects higher accumulation on A. thaliana seedlings stressors such as flooding, salinity, cold, drought. Transgenic plants were generated...