A5005886146- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Nanomaterials for catalytic reactions
- Ammonia Synthesis and Nitrogen Reduction
- Supercapacitor Materials and Fabrication
- Hydrogen Storage and Materials
- Fuel Cells and Related Materials
- Catalytic Processes in Materials Science
- High-Velocity Impact and Material Behavior
- Advancements in Battery Materials
- Oxidative Organic Chemistry Reactions
- High-Temperature Coating Behaviors
- Mechanical Behavior of Composites
- Synthesis and Catalytic Reactions
- Quantum Dots Synthesis And Properties
- Analytical Chemistry and Chromatography
- Chemical Synthesis and Reactions
- Catalysis for Biomass Conversion
- Catalysis and Hydrodesulfurization Studies
- Synthesis of β-Lactam Compounds
- Membrane-based Ion Separation Techniques
- Polyoxometalates: Synthesis and Applications
- Conducting polymers and applications
Sungkyunkwan University
2020-2024
Institute for Basic Science
2020-2024
MIT World Peace University
2021
Government of the Republic of Korea
2015-2020
Suwon Research Institute
2020
Savitribai Phule Pune University
2020
Myongji University
2015-2019
National Chemical Laboratory
2003-2015
Fusion Academy
2015
Fusion (United States)
2015
Exploring earth-abundant electrocatalysts with Pt-like performance toward alkaline hydrogen evolution reaction (HER) is extremely desirable for the economy but remains challenging. Herein, density functional theory (DFT) predictions reveal that electronic structure and localized charge at heterointerface of NiP2–FeP2 can be significantly modulated upon coupling metallic Cu, resulting in optimized proton adsorption energy reduced barrier water dissociation, synergistically boosting HER....
Single-atom-catalysts (SACs) afford a fascinating activity with respect to other nanomaterials for hydrogen evolution reaction (HER), yet the simplicity of single-atom center limits its further modification and utilization. Obtaining bimetallic single-atom-dimer (SAD) structures can reform electronic structure SACs added atomic-level synergistic effect, improving HER kinetics beyond SACs. However, synthesis identification such SAD remains conceptually challenging. Herein, systematic...
A multilayered GO@Fe@Ni–Co@NF electrode is developed, which works effectively for selective overall alkaline seawater splitting at industrial current density (1 cm<sup>−2</sup>) with exceptional stability more than 380 h.
Abstract Single‐atom catalysts (SACs) have become the forefront of energy conversion studies, but unfortunately, origin their activity and interpretation synchrotron spectrograms these materials remain ambiguous. Here, systematic density functional theory computations reveal that edge sites—zigzag armchair—are responsible for graphene‐based Co (cobalt) SACs toward hydrogen evolution reaction (HER). Then, edge‐rich (E)‐Co single atoms (SAs) were rationally synthesized guided by theoretical...
Tensile-strain introduced on the surface of oxide support via liquid nitrogen quenching method stabilized ultra-high loading single metal atom site for exceptional urea electrolysis.
Utilizing earth-abundant seawater over scarce freshwater for hydrogen fuel production via water electrolysis is a promising/sustainable strategy. However, the serious anodic corrosion due to competing chloride oxidation reaction significantly hampers overall stability of electrolyzer. Therefore, it demands an efficient and robust catalyst with high selectivity resistance direct splitting. Here, we present bifunctional developed by morphology engineering form nanorod array-based hierarchical...
Achieving an ultra-low overpotential for oxygen generation over pre-adsorbed surface on a Ru single atom anchored metal alloy.
Abstract The exact understanding for each promotional role of cation and anion vacancies in bifunctional water splitting activity will assist the development an efficient activation strategy inert catalysts. Herein, systematic first‐principles computations demonstrate that synergy anion–oxygen cation–manganese ( V O Mn ) manganese dioxide (MnO 2 nanosheets results abnormal local lattice distortion electronic modulation. Such alterations enrich accessible active centers, increase...
Amorphization of the support in single-atom catalysts is a less researched concept for promoting catalytic kinetics through modulating metal-support interaction (MSI). We modeled ruthenium (RuSAs ) supported on amorphous cobalt/nickel (oxy)hydroxide (Ru-a-CoNi) to explore favorable MSI between RuSAs and skeleton alkaline hydrogen evolution reaction (HER). Differing from usual crystal counterpart (Ru-c-CoNi), electrons are facilitated exchange among local configurations (Ru-O-Co/Ni) Ru-a-CoNi...
Efficient transition metal oxide electrocatalysts for the alkaline hydrogen evolution reaction (HER) have received intensive attention to energy conversion but are limited by their sluggish water dissociation and unfavorable migration coupling. Herein, systematic density functional theory (DFT) predicts that on representative NiO, hydroxylation (OH–) heterointerface coupled with metallic Cu can respectively reduce barrier of facilitate spillover. Motivated theoretical predictions, we subtly...
Exploring Earth-abundant metal oxides for ambient N2 (Lewis base) reduction to value-added NH3, an essential commodity modern industries, has extreme significance. However, due their insufficient Lewis acidity and unfavorable electronic parameters, resulting in poor adsorption, instability of key N intermediates (NNH*/NNH2*/N*), preference hydrogen evolution, the NH3 selectivity yield rate with are far from satisfactory. Herein, theoretical predictions reveal that tuning structure defective...
Exploring single-atom catalysts (SACs) for the nitrate reduction reaction (NO3-; NitRR) to value-added ammonia (NH3) offers a sustainable alternative both Haber-Bosch process and NO3--rich wastewater treatment. However, due insufficient electron deficiency unfavorable electronic structure of SACs, resulting in poor NO3--adsorption, sluggish proton (H*) transfer kinetics, preferred hydrogen evolution, their NO3--to-NH3 selectivity yield rate are far from satisfactory. Herein, systematic...
The challenge of achieving efficient photocatalytic H2 production from water splitting without sacrificial agents remains a significant hurdle. Herein, we demonstrate that the dual doping Cu/Co single atoms on Li-reduced blue TiO2 (Cu–Co SA/BTO) can effectively modulate charge separation photogenerated carriers during pure splitting. Remarkably, evolution rate Cu–Co SA/BTO achieves remarkable value 1238.15 μmol·g–1·h–1, surpassing BTO by 11 times. Particularly, femtosecond transient...
Abstract The chlorine evolution reaction (CER) is a crucial anode in the chlor‐alkali industrial process. Precious metal‐based dimensionally stable anodes (DSA) are commonly used as catalysts for CER but constrained by their high cost and low selectivity. Herein, Pt dual singe‐atom catalyst (DSAC) dispersed on fluorine‐doped carbon nanotubes (F‐CNTs) designed an efficient robust prepared DSAC demonstrates excellent activity with overpotential of 21 mV to achieve current density 10 mA cm −2...
While higher selectivity of nitrogen reduction reaction (NRR) to ammonia (NH3 ) is always achieved in alkali, the dependence on (N2 protonation and mechanisms therein are unrevealed. Herein, we profile how NRR theoretically relies upon first that collectively regulated by proton (H) abundance adsorption-desorption, along with intermediate-*NNH formation. By incorporating electronic metal modulators (M=Co, Ni, Cu, Zn) nitrogenase-imitated model-iron polysulfide (FeSx), a series FeMSx...
With the rising energy crisis and increasingly serious environmental issues, clean sources like fuel cell lithium–air batteries are attracting attention of whole world. The direct cell, especially, is believed to be quintessential replacement for conventional because its high conversion capacity. Electrochemical water splitting has an important role in such sustainable technologies. Catalysts play a worthwhile splitting, especially oxygen evolution reaction (OER). Engineering fine...