A5081131684- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Ionic liquids properties and applications
- Fuel Cells and Related Materials
- Advanced Thermoelectric Materials and Devices
- Carbon Dioxide Capture Technologies
- Gas Sensing Nanomaterials and Sensors
- Carbon dioxide utilization in catalysis
- Catalytic Processes in Materials Science
- Microbial Fuel Cells and Bioremediation
- Geoscience and Mining Technology
- Ammonia Synthesis and Nitrogen Reduction
- Electrochemical Analysis and Applications
- Hydrocarbon exploration and reservoir analysis
- Advanced Photocatalysis Techniques
Korea Institute of Science and Technology
2021-2024
Korea University
2021-2024
Sungkyunkwan University
2023
Government of the Republic of Korea
2021
Seoul Institute
2021
The electrochemical reduction of CO2 to ethylene has the potential reduce greenhouse gas emissions while producing commodity chemicals for plastics; however, a scalable and feasible system this remains challenge. Herein, we report an efficient stackable electrode design electrolysis ethylene. Using KOH-incorporated Cu nanoparticle (Cu-KOH) as cathode in zero-gap electrolyzer, Faradaic efficiency 78.7% C2 products was achieved at current density 281 mA cm–2. Among products, with 54.5% FE...
For a CO2 reduction reaction (CO2RR), cation-exchange membrane (CEM)-based electrode assembly (MEA) electrolyzers are among the most commercially viable systems; however, acidic environment in these lowers CO2RR selectivity. Herein, we outline broad methods for enhancing performance of CEM MEA by providing an alkaline cathode. An appropriate amount anion exchange ionomer, high-alkali cation concentration, and thick catalyst layer with carbon increase pH gradient neutralization minimize...
Abstract To realize economically feasible electrochemical CO 2 conversion, achieving a high partial current density for value-added products is particularly vital. However, acceleration of the hydrogen evolution reaction due to cathode flooding in high-current-density region makes this challenging. Herein, we find that partially ligand-derived Ag nanoparticles (Ag-NPs) could prevent electrolyte while maintaining catalytic activity electroreduction. This results Faradaic efficiency (>90%)...
In a membrane electrode assembly (MEA) electrolyzer based on cation-exchange membrane, achieving an efficient and stable CO2 reduction reaction (CO2RR) is challenging because the transport of protons, cations, electro-osmotic water from anode changes balance ions. Herein, we derived microenvironment for CO2RR performance by using two strategies. First, mixture carbon anion-exchange ionomer buffer layers used to hold cations while managing in local alkaline media. The second strategy involves...
RuNiO x has achieved excellent performance and stability for OER in acidic media. Ni distorts the oxygen lattice structure of RuO , creating many vacancies. The increased participation enhances activity. • In-situ/Operando analyses helped unveil role introduced Ni. Introducing Ru oxide is a promising approach to enhance catalytic activity evolution reaction (OER). However, (which poor intrinsic activity) not fully understood. Here, electrode fabricated via modified dip coating method...
This study presents a low-cost CO2 electrolysis stack utilizing porous-membrane exhibiting good performance and durability. The membrane electrode assembly (MEA), configuration, composed of an Ag cathode, IrO2 anode, polyvinylidene fluoride (PVDF) porous membrane, was optimized through various single-cell studies. To optimize the process for increasing area reduction electrode, characteristics spray coating method electron beam irradiation technology were compared. fabricated e-beam process,...
The electrochemical conversion of CO2 into CO using solar energy is the most efficient technique for artificial photosynthesis. However, many challenges remain, including realisation large-scale systems with high current density and stability. Herein, we report a carbon-supported tungsten-seed-based 3D silver dendrite ([email protected]) catalyst abundant nanograin boundaries that exhibit enhanced reduction (CO2R) performance In zero-gap electrolyzer, [email protected] showed outstanding...
Technoeconomic analysis (TEA) sensitivity results for a CO<sub>2</sub>RR system with porous membrane (PM).
Abstract To secure the economic feasibility of electrochemical carbon dioxide reduction reaction (CO 2 RR), a method using support materials to reduce amount catalyst loading and increase catalytic activity for CO RR can be solution. Herein, guidelines selecting suitable are reported. In gaseous ‐fed electrolyzer, an Ag nanoparticle‐composited nanocage (denoted as Ag/CNC) electrode exhibits optimal performance with partial current density ≈400 mA cm −2 . Ag/CNC showcases uniformly dispersed...
We introduce a silica-hydroxide cycle analogous to Earth's carbonate-silicate cycle. The reduces the local pH by redistributing hydroxide ions, enhances CO 2 mass transfer, breaking current density limits in RR.
In situ pH measurements are carried out to elucidate the CO 2 RR anode environment. It is revealed that local near goes through severe fluctuation, and a guideline for development of material suggested.
Single atom catalysts (SACs) anchored to N-carbon (M-Nx-C) have been extensively investigated owing their impressive catalytic activity and relatively low cost. In contrast the bulk catalysts, M-Nx-C almost maintain oxidation states even under cathodic potentials, displaying only minor adjustments in its pristine electronic structure. this context, we examined structure of nitrogen through in-situ/operando NEXAFS unveil origin distinct configuration M-Nx-C. We were able observe behavior N,...
Global warming increases methane emissions from Arctic permafrost, which in turn reaccelerates global warming, creating a vicious cycle. Addressing this issue requires innovative solutions, such as electro-assisted partial oxidation (EMPO), can provide an on-site facility for sustainable emission reduction permafrost. In study, Co singe-atom catalyst was synthesized oxygen reaction (ORR) that be practically applied to stand-alone EMPO systems. To address performance degradation and cold...
Adv. Sustainable Syst. 2021, 6, 2100216. DOI: 10.1002/adsu.202100216 In the originally published article listed affiliation for Won Suk Jung is incorrect. The correct below. W.S. School of Food Biotechnology and Chemical Engineering Hankyong National University 327 Jungang-ro, Anseong 17579, Republic Korea
Abstract In a membrane electrode assembly (MEA) electrolyzer based on cation exchange membrane, achieving an efficient and stable CO 2 reduction reaction (CO RR) is challenging because the transport of protons, cations, electroosmotic water from anode changes balance ions. Herein, we derived microenvironment for RR performance using two strategies. First, mixture carbon anion- ionomer buffer layers used to hold cations while managing in local alkaline media. The second strategy involves...
The electrochemical conversion of solar energy into competent chemicals is the most efficient technique to ensure clean and sustainable source for society in future. In fact, cells can electrochemically produce electricity without pollution by converting CO 2 a variety chemicals. carbon dioxide reduction reaction (CO RR) an environmentally friendly approach useful hydrocarbons such as monoxide (CO), methane, ethylene, formates, etc alcohols remove exhausted , which greenhouse gas....
CO2 Reduction Recently, as a way to address global warming, research on electrochemical carbon dioxide conversion valuable chemicals has been being actively conducted. In article number 2100216, Won Suk Jung, Hyung-Suk Oh and co-workers report the development of silver nanoparticles supported nano-cage catalyst for converting CO. The demonstrates high catalytic activity durability, is easy mass-produce by applying it stacked zero-gap electrolyzer.