A5086156640- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Advanced Thermoelectric Materials and Devices
- Electrochemical Analysis and Applications
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Advanced Battery Materials and Technologies
- Hybrid Renewable Energy Systems
- Ammonia Synthesis and Nitrogen Reduction
- Conducting polymers and applications
- Nanomaterials for catalytic reactions
- Advanced Battery Technologies Research
- Thermal Expansion and Ionic Conductivity
- CO2 Reduction Techniques and Catalysts
- Neuroscience and Neural Engineering
- Nanoporous metals and alloys
- Electrochemical sensors and biosensors
- Machine Learning in Materials Science
- Ionic liquids properties and applications
- Advanced Memory and Neural Computing
- Supercapacitor Materials and Fabrication
- Catalysis and Hydrodesulfurization Studies
- Muscle activation and electromyography studies
- Advancements in Battery Materials
Pohang University of Science and Technology
2019-2025
Pusan National University
2016
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...
As a new class of materials, implantable flexible electrical conductors have recently been developed and applied to bioelectronics. An ideal conductor requires high conductivity, tissue-like mechanical properties, low toxicity, reliable adhesion biological tissues, the ability maintain its shape in wet physiological environments. Despite significant advances, that satisfy all these requirements are insufficient. Herein, facile method for manufacturing conductive hydrogels through...
Growing the hydrogen economy requires improving stability, efficiency, and economic value of water-splitting technology, which uses an intermittent power supply from renewable energy sources. Alkaline water electrolysis systems face a daunting challenge in terms stabilizing production under condition transient start-up/shut-down operation. Herein, we present simple but effective solution for electrode degradation problem induced by reverse-current based on fundamental understanding mechanism...
Despite the adverse effects of H2 bubbles adhering to catalyst's surface on performance water electrolysis, mechanisms by which are effectively released during alkaline hydrogen evolution reaction (HER) remain elusive. In this study, a systematic investigation effect nanoscale morphologies bubble release behaviors and HER employing earth-abundant Ni catalysts consisting an array nanorods (NRs) with controlled porosities is performed. Both aerophobicity hydrophilicity vary according porosity...
Startup and shutdown (SU/SD) events in automotive polymer electrolyte membrane fuel cells cause an unintended oxygen reduction reaction (ORR) due to the mixing of air anode, leading instantaneous potential jumps subsequent carbon corrosion cathode. Here, a selective electrocatalysis method for hydrogen oxidation (HOR) is presented as promising approach inhibiting ORR preventing cathodic during SU/SD events. Platinum (Pt) supported on titanium dioxide (TiO2) demonstrated HOR-selective...
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...
Alkaline water electrolysis (AWE), a predominant technology for large-scale industrial hydrogen production, faces limitations in commercialization owing to the inadequate catalytic activity and stability of oxygen evolution reaction (OER) electrocatalysts. This study introduces NiFeAl self-supported electrode characterized by high OER outlines rational design strategy NiFe (oxy)hydroxide-based electrodes. The introduction Al, ternary dopant with relatively low electronegativity small ionic...
The ReS 2 /TiO hollow microcones synthesized via the MW-HT consecutive method exhibited excellent HER catalytic performance.
Proton exchange membrane water electrolysis is actively researched to improve the oxygen evolution reaction (OER) for effective hydrogen production. However, commercialization of application electrodes still requires nanostructure integration and further improvements. We studied effects representative materials: iridium (has high stability maintains a surface area with nanosized pores), ruthenium intrinsic activity but causes structural agglomeration nanostructures), osmium (facilitates...
The advancement of water electrolysis technology has seemingly plateaued. Further advances require new strategies to address the key limitations oxygen evolution reaction: high overpotential and low stability electrode materials. Herein, we designed a nanoporous Ir3Co-core@IrO2-shell electrocatalyst with 5 3 times higher mass activity 6 2 activity–stability factors than conventional IrO2 nanoparticles Ir electrocatalysts, respectively. origin performance enhancement in was revealed...
Extraneural Electrodes In article number 2203431, Youn Soo Kim and co-workers introduce an ideal conductive hydrogel for tissue-like extraneural electrodes with high conformability to improve the tissue–electronic interface. This exhibits excellent adhesion, biocompatibility, non-swelling, electrical conductivity in water. The is implanted into sciatic nerve of rats, neuromodulation successfully demonstrated through low-current stimulation.
A hurdle to the commercialization of thermoelectrochemical cells (TECs) based on redox reaction hexacyanoferrate (HCF) convert low-grade waste heat into electricity is high manufacturing cost resulting from noble electrode materials like Pt and nanostructured carbon. Herein, we report successful exploitation low-cost Cu, which has not been considered ever for TEC material because its heavy corrosion in operating condition. Interestingly, found that by precisely tuning pH...
Thermoelectrochemical cells (TECs) are efficient energy harvesting devices that convert low-grade waste heat into electricity. However, TECs based on hexacyanoferrate (Fe(CN)64–/Fe(CN)63–, HCF) require high-cost metal electrodes such as platinum (Pt), hindering their commercialization. Herein, we introduce titanium carbide (TiC) formed via the thermal decomposition of CH4 an alternative to Pt for TECs. Titanium is difficult be used in TECs, whereas TiC a promising non-noble electrode can...
Abstract Harvesting low‐grade waste heat, which constitutes 60% of the overall is key to halting climate change. Electrochemical waste‐heat harvesting has recently drawn attention practical harvesting. In this study, a power density maximization strategy presented in scalable and cost‐effective aqueous redox couple‐based thermo‐electrochemical cells (TECs). The n‐type feature water‐soluble Fe 2+/3+ couple essential for constructing TEC p–n leg device; however, it not been investigated much...
<p>Oxygen evolution reaction (OER) can convert renewable energy into hydrogen through water electrolysis. Identifying stable and active single-atom catalysts (SACs) for OER under acidic conditions holds great promise developing cost-effective efficient storage solutions, but challenging due to the vast number of potential material compositions diverse surface morphologies. Here, accelerate new discoveries, we present a high-throughput screening (HTS) framework that leverages power...
Suppressing failure modes and optimizing protocols enable enhanced cyclability fast chargeability in Co-free, high-Ni layered oxide cathodes.
Most studies on ammonia electrolysis have focused anion exchange membranes (AEMs), which face limitations in operating conditions, such as pH and concentration. This study introduces a novel concept of an cell (AEC) utilizing Zirfon separator capable under high concentrations. The Zirfon-based AECs achieve peak current density 915 mA cm-2, representing the highest reported value AEC literature. Additionally, exhibits less conductivity degradation than AEMs during cycling tests (Zirfon 14.1%,...
Abstract Although metal exsolution from perovskite materials effectively improves catalytic activity, its high temperature and prolonged operation time present challenges for industrial synthesis efficiency scalability, emphasizing the necessity straightforward scalable fabrication methods at lower temperatures. Herein, a novel catalyst approach through bead milling of nanoparticles are introduced to achieve low‐temperature (300 °C) exsolution. The process reduces particle size less than 50...