A5085735977- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Catalytic Processes in Materials Science
- MXene and MAX Phase Materials
- Advanced Memory and Neural Computing
- 2D Materials and Applications
- Nanoparticle-Based Drug Delivery
- Advanced biosensing and bioanalysis techniques
- CO2 Reduction Techniques and Catalysts
- Copper-based nanomaterials and applications
- Supercapacitor Materials and Fabrication
- Chalcogenide Semiconductor Thin Films
- Molecular Sensors and Ion Detection
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Molecular Junctions and Nanostructures
- Anodic Oxide Films and Nanostructures
- Laser-Ablation Synthesis of Nanoparticles
- Crystal Structures and Properties
- Nanocluster Synthesis and Applications
- Machine Learning in Materials Science
- Supramolecular Self-Assembly in Materials
Korea University
2016-2025
Government of the Republic of Korea
2017-2021
Seoul Institute
2016-2021
Institute for Basic Science
2016-2018
Institute of Spectroscopy
2018
The development of two-dimensional (2D) high-performance electrode materials is the key to new advances in fields energy conversion and storage. MXenes, a intriguing family 2D transition metal carbides, nitrides, carbonitrides, have recently received considerable attention due their unique combination properties such as high electrical conductivity, hydrophilic nature, excellent thermal stability, large interlayer spacing, easily tunable structure, surface area. In this review, we discuss...
Catalytic properties of nanoparticles can be significantly enhanced by controlling nanoscale alloying and its structure. In this work, using a facet-controlled Pt@Ni core–shell octahedron nanoparticle, we show that the phase segregation have directionality geometrically controlled to produce Ni is penetrated Pt atoms along three orthogonal Cartesian axes coated edges. This peculiar anisotropic diffusion core ⟨100⟩ vertex, then toward ⟨110⟩ edges, explained via minimum strain energy for Ni–Ni...
TMD-decorated MXene hybrids have emerged as alternatives for energy storage and conversion applications. Herein, recent progress, role of the unique junctions TMD–MXene their challenges further improvement has been reviewed.
The rational design of highly efficient electrocatalysts for the hydrogen evolution reaction (HER) is prime importance establishing renewable and sustainable energy systems. alkaline HER particularly challenging as it involves a two-step water dissociation recombination, which platinum-based binary catalysts have shown promising activity. In this work, we synthesized high performance platinum-nickel-cobalt alloy nanocatalysts through simple synthetic route. This ternary nanostructure with...
Hollow Rh<sub>2</sub>S<sub>3</sub> hexagonal nanoprisms, prepared by one-step formation of core–shell nanoprisms followed the etching a core, exhibit very high catalytic activity and excellent stability toward hydrogen evolution reaction.
The development of Pt-free electrocatalysts for the hydrogen evolution reaction (HER) recently is a focus great interest. While several strategies are developed to control structural properties non-Pt catalysts and boost their electrocatalytic activities HER, generation highly reactive defects or interfaces by combining metal with other metals, oxides/sulfides, can lead notably enhanced catalytic performance. Herein, preparation cactus-like hollow Cu2-x S@Ru nanoplates (NPs) that contain...
Abstract Designing high‐performance, precious‐metal‐based, and economic electrocatalysts remains an important challenge in proton exchange membrane (PEM) electrolyzers. Here, a highly active durable bifunctional electrocatalyst for PEM electrolyzers based on rattle‐like catalyst comprising Ni/Ru‐doped Pt core Pt/Ni‐doped RuO 2 frame shell, which is topotactically transformed from icosahedral Pt/Ni/Ru nanocrystal, reported. The ‐based shell with its reactive surfaces leads to very high...
Abstract Considerable attention on sustainable clean energy resources has led to the development of a plethora catalytic materials, specifically geared toward water electrolysis. Among various developed catalysts, noble‐metal‐based electrocatalysts have shown promising performances for oxygen and hydrogen evolution reactions (OER HER). However, their high price scarcity always been roadblocks commercialization water‐splitting technology. Recently, transition metal phosphides (TMP) phosphates...
The electrochemical upcycling of plastic waste offers a more efficient and safer means to produce value-added products under mild conditions.
This review provides a comprehensive overview of the research trends in synthesized and predicted non-Ti MXenes. The synthetic methods, unique properties, applications, advantages MXenes compared to Ti-based are discussed.
A layered β-NiOOH crystal with undercoordinated facets is an active and economically viable nonnoble catalyst for the oxygen evolution reaction (OER) in alkaline electrolytes. However, it extremely difficult to enclose because of its inevitable transformation γ-NiOOH, resulting exfoliation catalytic surfaces. Herein, we demonstrate {111}-faceted Ni octahedra as parent substrates whose surfaces are easily transformed catalytically during OER. Electron microscopic measurements that...
An IrRu nanocactus on a Cu<sub>2−x</sub>S@IrS<sub>y</sub> core exhibits excellent electrocatalytic activity and stability toward both the hydrogen evolution reaction oxygen in an acidic electrolyte.
Abstract The development of highly active electrocatalysts is crucial for the advancement renewable energy conversion devices. design core–shell nanoparticle catalysts represents a promising approach to boost catalytic activity as well save use expensive precious metals. Here, simple, one‐step synthetic route reported prepare hexagonal nanosandwich‐shaped Ni@Ru nanoparticles (Ni@Ru HNS), in which Ru shell layers are overgrown regioselective manner on top and bottom, around center section Ni...
This review addresses recent developments in Pt–Cu based catalysts toward various energy conversion electrocatalytic applications such as the HER, ORR, MOR, EGOR and FAOR.
Hydrogen Evolution Reaction In article number 2305035, Jin Young Kim, Mu-Hyun Baik, Kwangyeol Lee, and co-workers present a CrOx-doped Co9S8/CuCrS2 mosaic hetero-nanocatalyst for hydrogen evolution reaction in neutral conditions. The CrOx dopants enhance water adsorption/dissociation facilitate electron transfer to Co sites, optimizing generation. innovative design integrates oxophilic HER-active domains, demonstrating exceptional performance stability, paving the way advanced catalysts...
Postmodification of nanocrystals through cation exchange has been very successful in diversifying nanomaterial compositions while retaining the structural motif. Copper compound nanoparticles are particularly useful as templates because inherent defects serving effective diffusion routes and excellent mobility. Therefore, development shape-controlled multianion systems, such copper phosphosulfide, can potentially lead to formation diverse metal phosphosulfide nanomaterials that have...
Chemical transformations via postsynthetic modification of colloidal nanocrystals have received great attention as a rational synthetic route to unprecedented nanostructures. In particular, the cation exchange reaction is considered an effective method alter composition starting nanostructures while maintaining initial structural characteristics. Herein, we report synthesis highly crystalline Pd13Cu3S7 nanoplates (NPs) partial Cu1.81S phase by Pd cations, with Cu1.94S NPs and...