A5027203859- Electrocatalysts for Energy Conversion
- Advancements in Solid Oxide Fuel Cells
- Catalytic Processes in Materials Science
- Electronic and Structural Properties of Oxides
- Fuel Cells and Related Materials
- Ammonia Synthesis and Nitrogen Reduction
- Catalysis and Oxidation Reactions
- Advanced battery technologies research
- Nanomaterials for catalytic reactions
- Catalysis and Hydrodesulfurization Studies
- Advanced Photocatalysis Techniques
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Hydrogen Storage and Materials
- Magnetic and transport properties of perovskites and related materials
- Advancements in Battery Materials
- Electrochemical Analysis and Applications
- Thermal Expansion and Ionic Conductivity
- Catalysis for Biomass Conversion
- Environmental DNA in Biodiversity Studies
- Supercapacitor Materials and Fabrication
- Nuclear materials and radiation effects
- nanoparticles nucleation surface interactions
- Advanced Nanomaterials in Catalysis
- Lubricants and Their Additives
Korea Institute of Science and Technology
2019-2025
Korea University of Science and Technology
2022-2025
Government of the Republic of Korea
2015-2020
Technical University of Denmark
2017-2020
Seoul Institute
2019-2020
Korea Advanced Institute of Science and Technology
2015-2017
Daejeon University
2015-2016
Yonsei University
2011-2015
H2O2 is a valuable, environmentally friendly oxidizing agent with wide range of uses from the provision clean water to synthesis valuable chemicals. The on-site electrolytic production would bring chemical applications beyond its present reach. successful commercialization electrochemical requires cathode catalysts high activity, selectivity, and stability. In this Perspective, we highlight our current understanding factors that control performance. We review influence catalyst material,...
Abstract As a catalyst, single‐atom platinum may provide an ideal structure for minimization. Herein, catalyst of supported on titanium nitride nanoparticles were successfully prepared with the aid chlorine ligands. Unlike nanoparticles, active sites predominantly produced hydrogen peroxide in electrochemical oxygen reduction highest mass activity reported so far. The electrocatalytic oxidation small organic molecules, such as formic acid and methanol, also exhibited unique selectivity...
Single-atom catalysts (SACs) provide an ideal platform for reducing noble-metal usage. SACs also exhibit unusual catalytic properties due to the absence of a metal surface. The role support may have significant effect on properties, similar that ligand molecules in homogeneous catalysts. Here, was demonstrated by preparing single-atom platinum catalyst two different supports: titanium carbide (Pt1/TiC) and nitride (Pt1/TiN). formation Pt confirmed STEM, EXAFS, situ IR spectroscopy. Pt1/TiC...
Abstract Single atomic Pt catalyst can offer efficient utilization of the expensive platinum and provide unique selectivity because it lacks ensemble sites. However, designing such a with high loading good durability is very challenging. Here, single supported on antimony‐doped tin oxide (Pt1/ATO) synthesized by conventional incipient wetness impregnation, up to 8 wt% Pt. The structure confirmed high‐angle annular dark field scanning tunneling electron microscopy images extended X‐ray...
Platinum was epitaxially deposited on gold octahedral nanocrystals using an electrochemical method. The coverage of platinum the surface finely controlled from fully covered multiple overlayers (5 monolayers; denoted as ML) to atomically dispersed submonolayer (0.05 ML). Catalytic activity for formic acid oxidation increased significantly (0.52 A/mgPt 5 ML 62.6 0.05 with decreasing coverage. This high resulted control reaction pathway toward direct producing no surface-poisoning species,...
Electrocatalytic N2 reduction to ammonia has recently attracted a great deal of interest as possible renewable energy-driven alternative the Haber–Bosch process. However, detection NH3 after attempting electrocatalytic can be hampered by low yields, ambient contamination, and need for multistep chemical separation from electrolyte. Herein, we report frequency-selective pulse nuclear magnetic resonance (NMR) method quantify efficacy this measure concentration (present in assay NH4+) an...
Abstract As a catalyst, single‐atom platinum may provide an ideal structure for minimization. Herein, catalyst of supported on titanium nitride nanoparticles were successfully prepared with the aid chlorine ligands. Unlike nanoparticles, active sites predominantly produced hydrogen peroxide in electrochemical oxygen reduction highest mass activity reported so far. The electrocatalytic oxidation small organic molecules, such as formic acid and methanol, also exhibited unique selectivity...
Ammonia can be directly utilized in solid oxide fuel cells, known as direct-ammonia cells (DA-SOFCs), which are among the most efficient technologies for ammonia utilization. Current research efforts directed towards lowering operating temperatures of DA-SOFCs by incorporating additional catalysts. However, critical analyses regarding extent decomposition on metallic interconnects and Ni current collectors, well negative effect residual performance, lacking. In this study, we examine with a...
A low cost, low-temperature processable, highly efficient nickel sulfide counter electrode is demonstrated. Using the tailored, preformed nanoparticles and electrostatic self-assembly, a novel was fabricated that exceeded efficiency of conventional Pt-based cell.
Shaped Ir–Ni bimetallic nanoparticles were synthesized and used for electrocatalytic oxygen evolution reaction (OER).
Low temperature CO oxidation reaction is known to be facilitated over platinum supported on a reducible cerium oxide. Pt species act as binding sites for reactant molecules, and oxygen vacancies surface of oxide atomically activate the O2 molecules. However, impacts size concentration vacancy at have not been clearly distinguished, thereby various diverse approaches suggested date. Here using co-precipitation method we prepared pure ceria support infiltrated it with solution obtain 0.5...
Single-atom Pt/ceria catalysts are extremely active and thermally stable at over 700 °C in high-temperature solid oxide cell electrodes.
Ammonia is a promising carbon-free hydrogen carrier. Owing to their nickel-rich anodes and high operating temperatures, solid oxide fuel cells (SOFCs) can directly utilize NH
Abstract A noble surface engineering method was developed to create a binder-free flexible electrode comprising Ti 3 C 2 T x MXene/carbon nanofibers (MCNFs) covered by amorphous RuO with combined electrospinning and hydrothermal process. Utilizing the hydrophilicity of MXene on/in MCNFs, easily coated on surfaces MCNFs through oxygen-mediated chemical bonding between functional groups Ru ions. structural analysis revealed that acted as growth template for formed had an disordered state in...
Abstract This study presents a surface engineering strategy utilizing electronic waste (e‐waste) to incorporate single‐atom catalysts on conjugated polymers. Employing porphyrin polymeric photocatalyst, gold single‐atom‐site are successfully introduced using the acidic metal leachates from e‐waste, where speciation and composition regulated during loading processes. The resulting photocatalyst with single atoms demonstrates remarkable hydrogen peroxide (H 2 O ) selectivity of up 97.56%,...