Sungkyunkwan University · Materials Science
Professor Bong Kyun Kang's research lab specializes in the design and synthesis of advanced non-precious metal electrocatalysts and nanostructured materials for sustainable energy conversion and storage. The lab focuses on developing transition metal nitrides, oxides, and hybrid nanomaterials—particularly those with tailored 3D architectures, mesoporosity, and heterostructuring—for efficient oxygen evolution reaction (OER) in water electrolysis. Key research directions include the rational design of non-platinum group metal (non-PGM) catalysts, integration of conductive carbon matrices, and the development of high-performance photoanodes and anion exchange membrane (AEM) electrolyzers for green hydrogen production.
Figures are computed from collected data and may differ slightly.
The suitable materials, metal nitrides, are a promising class of electrocatalyst materials for a highly efficient oxygen evolution reaction (OER) because they exhibit superior intrinsic conductivity and have higher sustainability than oxide-based materials. To our knowledge, for the first time, we report a designable synthesis of three-dimensional (3D) and mesoporous Co3N@amorphous N-doped carbon (AN-C) nanocubes (NCs) with well-controlled open-framework structures via monodispersed Co3[Co(CN)6]
The mesoporous NiO/NiFe<sub>2</sub>O<sub>4</sub>multi-composite hollow nanocage electrodes are fabricated and achieve a low overpotential (303 mV at 10 mV cm<sup>−2</sup>) and Tafel plot (58.5 mV dec<sup>−1</sup>), respectively, and excellent cycling stability (12 h) as an anode material for oxygen evolution reaction, holding great promise for water splitting.
Ni 3 FeN and a N-doped carbon shell have improved electrical conductivity with the electronic structure modified through the extra electrons of nitrogen. Ni 3 FeN@NC in the water splitting reaction provide excellent electrochemical catalytic properties.
We report successfully synthesizing two-dimensional (2D) and nanocrystalline (NC) Fe2Ni2N/rGO nanohybrid sheets (NHSs) via ammonolysis of as-prepared 2D Ni2.25Fe0.75[Fe(CN)6]2/rGO precursors. We compared the electrochemical properties of the 2D-NC Fe2Ni2N/rGO NHSs as non-precious-metal nitride and graphene nanohybrid electrocatalysts for an oxygen evolution reaction (OER) with those of NiFe-based composition. The overpotential and Tafel plot of the 2D-NC Fe2Ni2N/rGO NHSs had their lowest values
A nanodome structured BiVO 4 /GaO x N 1− x (BVO/GaON) bilayer photoanode that is prepared by a facile solution method, and that exhibits an improved photoelectrochemical water‐oxidation performance is reported. GaON porous nanospheres with an average size of ≈300 nm are first synthesized by a nitridation (NH 3 flow, 800 °C) of Ga 4 (OH) 10 SO 4 nanospheres. The GaON nanospheres are coated by a slurry coating method, and then the BVO layer is uniformly deposited by a sol–gel spin‐coating method t
Water electrolyzers powered by renewable energy are emerging as clean and sustainable technology for producing hydrogen without carbon emissions. Specifically, anion exchange membrane (AEM) electrolyzers utilizing non-platinum group metal (non-PGM) catalysts have garnered attention as a cost-effective method for hydrogen production, especially when integrated with solar cells. Nonetheless, the progress of such integrated systems is hindered by inadequate water electrolysis efficiency, primarily
To our best knowledge, monodispersed β-Ga2O3 nanospheres were successfully synthesized for first time via morphology-controlled gallium precursors using the forced hydrolysis method, followed by thermal calcination processes. The morphology and particle sizes of the gallium precursors were strongly dependent on the varying (R = SO4(2-)/NO3(-)) concentration ratios. As R decreased, the size of the prepared gallium precursors decreased and morphology was altered from sphere to rod. The synthesized
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