A5009375211- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Membrane-based Ion Separation Techniques
- Conducting polymers and applications
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Synthesis and properties of polymers
- Electrochemical Analysis and Applications
- Hybrid Renewable Energy Systems
- Catalytic Processes in Materials Science
- CO2 Reduction Techniques and Catalysts
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Membrane Separation Technologies
- Graphene research and applications
- Dendrimers and Hyperbranched Polymers
- Advancements in Battery Materials
- Molecular Junctions and Nanostructures
- Covalent Organic Framework Applications
- Catalysis and Hydrodesulfurization Studies
- Membrane Separation and Gas Transport
- Crystallography and molecular interactions
- Analytical Chemistry and Sensors
Korea Institute of Energy Research
2024
Korea Institute of Science and Technology
2013-2022
Korea University of Science and Technology
2016-2021
Seoul Institute
2019-2020
Government of the Republic of Korea
2015-2020
University of Science and Technology
2014
Sungkyunkwan University
2006
Samsung (South Korea)
2004
The University of Texas at Arlington
1996
Reported herein is elucidation of a novel Co-based oxygen evolution catalyst generated in situ from cobalt phosphide (CoP) nanoparticles. The present CoP nanoparticles, efficient alkaline hydrogen-evolving materials at the cathode, are revealed to experience unique metamorphosis upon anodic potential cycling an electrolyte, engendering and robust catalytic environments toward reaction (OER). Our extensive ex characterization shows that transformed bears porous nanoweb-like dispersed...
We report semi-interpenetrating polymer network (semi-IPN) membranes prepared easily from a cross-linked using poly(acrylic acid) (PAA) and poly(vinyl alcohol) (PVA) with interpenetrated Nafion for both proton-exchange membrane fuel cell (PEMFC) water electrolyzer (PEMWE) applications. Thermal esterification between PAA PVA induced three-dimensional cross-linking to improve mechanical toughness reduce hydrogen crossover, while the hydrophilic nature of PAA–PVA-based matrix still enhanced...
Oxygen-based electrocatalysis is an integral aspect of a clean and sustainable energy conversion/storage system. The development economic bifunctional electrocatalysts with high activity durability during reversible reactions remains great challenge. tailored porous structure separately presented active sites for oxygen reduction evolution (ORR OER) without mutual interference are most crucial achieving desired catalysts. Here, we report hybrid composed sheath–core cobalt oxynitride...
We report electrospun Co-carbon nanofibers as an efficient ORR catalyst and a study of active site formation.
Poly(2,6-dimethyl-1,4-phenylene oxide)s (PPOs)-based anion exchange membranes (AEMs) with four of the most widely investigated head groups were prepared. Through a combination experimental and simulation approaches, effects different types on properties AEMs, including hydroxide conductivity, water content, physicochemical stability, fuel cell device performance fully explored. Unlike other studies, in which conductivity was mostly liquid water, PPO-based AEMs 95% relative humidity (RH)...
With such excellent physicochemical and electrochemical properties, the crosslinked PPO-SEBS membrane shows high cell performance durability.
The hydrogen economy expansion triggered studies on the durability of hydrogen-powered proton-exchange membrane fuel cells (PEMFCs), which revealed that their performance is largely hindered by degradation cathode support. Herein, Ti3+-enriched N,C-codoped mixed-phase TiO2 nanoparticles featuring a reduced (compared to pristine TiO2) band gap and containing Ti3+ ions, oxygen vacancies, Ti–X bonds (X = O, OH, N, C) were synthesized as durable PEMFC support annealing. extent doping was...
With regard to the hydrogen economy, setting criteria for durability evaluation of renewable energy-powered proton exchange membrane water electrolysis (PEMWE) systems is an important milestone. In this study, accelerated stress test (AST) protocols that simulate fluctuating power supply energy were explored. The average load was varied by changing low voltage limit (LVL = 1.4, 1.5, 1.7, and 1.9 V) with fixation a high 2.2 V. AST can accurately reflect real solar profile various loads ramp...
Abstract Summary: Poly(2,5‐benzimidazole) (ABPBI) was synthesized in a novel polymerization medium containing CH 3 SO H and P 2 O 5 . 3,4‐Diaminobenzoic acid, monomer for ABPBI, is soluble the therefore performed homogeneous state. It produced polymer fibers, thus simplifying work‐up process. The membrane cast directly from mixture. Proton conductivities of ABPBI membranes ranged 0.02 to 0.06 S · cm −1 above 100 °C, without humidification, tensile strength approximately MPa. Synthesis...
Carbon-supported Pd3Au nanoparticle catalysts were synthesized via chemical reduction. Surface segregation of Pd in catalyst was achieved heat treatment under air, Ar, CO–Ar, and CO atmospheres, order to obtain a surface with changed structures composition. The composition analyzed by electrochemical methods, the observed increase from 67.2% (air (asp) sample) 80.6% (CO after atmosphere. CO-induced electrocatalyst resulted significantly improved formic acid oxidation (from 6.93 18.11 mA...