A5074161029- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- Perovskite Materials and Applications
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Metal-Organic Frameworks: Synthesis and Applications
- Quantum Dots Synthesis And Properties
- CO2 Reduction Techniques and Catalysts
- Ammonia Synthesis and Nitrogen Reduction
- Electronic and Structural Properties of Oxides
- Advanced Chemical Sensor Technologies
- Nanomaterials for catalytic reactions
- ZnO doping and properties
- MXene and MAX Phase Materials
- Chemical Looping and Thermochemical Processes
- Conducting polymers and applications
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Catalysts for Methane Reforming
Seoul National University
2021-2025
Although bismuth vanadate (BiVO4) has been promising as photoanode material for photoelectrochemical water splitting, its charge recombination issue by short diffusion length led to various studies about heterostructure photoanodes. As a hole blocking layer of BiVO4, titanium dioxide (TiO2) considered unsuitable because relatively positive valence band edge and low electrical conductivity. Herein, crystal facet engineering TiO2 nanostructures is proposed control structures the BiVO4...
Stabilizing atomically dispersed single atoms (SAs) on silicon photoanodes for photoelectrochemical-oxygen evolution reaction is still challenging due to the scarcity of anchoring sites. Here, we elaborately demonstrate decoration iridium SAs and assess role separation transfer photogenerated charge carriers. NiO/Ni thin film, an active highly stable catalyst, capable embedding in its lattices by locally modifying electronic structure. The isolated enable effective transport suppressing...
The conformal heterojunction of a competent hole transport layer onto the nanoporous BiVO 4 photoanode is highly challenging, despite its promise for unbiased photoelectrochemical (PEC) water splitting.
Abstract The development of new heterostructures with high photoactivity is a breakthrough for the limitation solar‐driven water splitting. Here, we first introduce indium oxide (In 2 O 3 ) nanorods (NRs) as novel electron transport layer bismuth vanadate (BiVO 4 short charge diffusion length. In NRs reinforce and hole blocking BiVO , surpassing state‐of‐the‐art photoelectrochemical performances ‐based photoanodes. Also, tannin–nickel–iron complex (TANF) used an oxygen evolution catalyst to...
Abstract Discovering a competent charge transport layer promoting separation in photoelectrodes is perpetual pursuit photoelectrochemical (PEC) water splitting to achieve high solar‐to‐hydrogen (STH) conversion efficiency. Here, conjugated polythiophene framework (CPF‐TTB) on Ta 3 N 5 elaborately electropolymerized, substantiating the hole behavior their heterojunction. Tailored band structures of CPF‐TTB/Ta reinforce photogenerated carriers, elevating fill factor photoanode modified with...
Hexagonal boron nitride (h-BN) is an excellent support material for nanocatalysts due to its two-dimensional (2D) architectural morphology and physicochemical stability. In this study, a chemically stable, recoverable, eco-friendly, magnetic h-BN/Pd/Fe2O3 catalyst was prepared by one-step calcination process, in which Pd Fe2O3 nanoparticles (NPs) were uniformly decorated on the surface of h-BN via typical adsorption-reduction procedure. detail, nanosized (Pd/Fe2O3) NPs derived from Prussian...
Atomically doped Au in NiFe-LDH effectively passivates defect sites, substantially enhancing overall PEC water oxidation properties.
The electrochemical reduction of carbon dioxide (EC CO 2 RR) is a promising technology to achieve carbon‐neutral society. EC RR can directly convert the greenhouse gas emitted from stacks into valuable fuels and chemical feedstocks for various industrial applications. Numerous metal‐based electrocatalysts have been researched reduce overpotential enhance product selectivity RR. Recently, single‐atom catalysts (SACs) are attracting intensive attention due their low‐cost, extremely high...
Two‐dimensional metal‐organic frameworks (MOFs) are regarded as promising electrocatalysts because of their high surface area and tunable compositions. Herein, a novel nickel‐based 2D MOF for efficient oxygen evolution reaction (OER) has been developed. Ni‐NDC nanosheets (NDC = naphthalene‐2,6‐dicarboxylic acid) successfully synthesized on nickel foam (NF) through surfactant‐assisted one‐step hydrothermal method. The resulting Ni‐NDC@NF possessing electrochemically active 3.06 mF cm −2...
Ruthenium (Ru)-based electrocatalysts have shown promise for anion exchange membrane water electrolysis (AEMWE) due to their ability facilitate dissociation in the hydrogen evolution reaction (HER). However, performance is limited by strong binding, which hinders desorption and re-adsorption. This study reports development of RuNi nanoalloys supported on MoO2, optimize binding strength at Ru sites through modulation adjacent Ni atoms. Theoretical simulations reveal that substituting atoms...
Abstract The transition to a carbon‐neutral society demands the development of efficient and durable electrocatalysts drive electrochemical water splitting CO 2 reduction reactions (CO RR). To fabricate high‐performing electrocatalysts, it is essential unveil catalyst materials’ activation deactivation mechanisms under actual reaction conditions, challenge that ex‐situ/post‐mortem characterization cannot fulfill. In‐situ transmission electron microscopy, X‐ray spectroscopy, Raman along with...
Abstract 2D transition metal dichalcogenides (TMDs) have emerged as promising materials for advanced gas sensing platforms owing to their abundant active edge sites, high surface area, and mechanical flexibility. However, TMDs encounter low selectivity issues they show responses a variety of gases, impeding practical use discrimination. Herein, it is demonstrated that in situ growth breathable zeolitic imidazolate framework‐leaf (ZIF‐L) dramatically enhances the SnS 2 ‐based sensors H S....
Abstract Simultaneous enhancement of light harvesting and charge transport in photoelectrochemical (PEC) systems is a major challenge to achieving high solar‐to‐hydrogen efficiency. Here, Ta 3 N 5 ‐Si Z‐scheme system constructed facilitate pathways from generation catalysis, taking advantage the exquisite bandgap band position . The tailored junction with an NbN x electron mediator effectively establishes enhances driving force for water oxidation, reducing onset potential by increment...
The sustainable electrocatalytic reduction of carbon dioxide into solar fuels offers a potential pathway to mitigate the impact greenhouse gas-induced climate change. Here, we successfully achieved high solar-to-fuel...
Abstract Stabilizing atomically dispersed single atoms (SAs) on Si photoanodes for photoelectrochemical-oxygen evolution reaction is still challenging due to the scarcity of anchoring sites. Here, we elaborately demonstrate decoration Ir SAs and assess role separation transfer photogenerated charge carriers. NiO/Ni thin film, an active highly stable catalyst, capable embedding in its lattices by locally modifying electronic structure. The isolated enable effective transport suppressing...