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Bandgap Reduction and Enhanced Photoelectrochemical Water Electrolysis of Sulfur-doped CuBi2O4 Photocathode
Eunhwa Kim, Sanghan Lee, Sangwoo Ryu
Korean J. Met. Mater. 2023;61(2):115-119.   Published online 2023 Jan 27
DOI: https://doi.org/10.3365/KJMM.2023.61.2.115

Abstract
As interest in hydrogen energy grows, eco-friendly methods of producing hydrogen are being explored. CuBi2O4 is one of the p-type semiconductor cathode materials that can be used for photoelectrochemical hydrogen production via environment-friendly water electrolysis. CuBi2O4 has a bandgap of 1.5 – 1.8 eV which allows it to photogenerate electrons..... More

                
Nucleation and Growth-Controlled Morphology Evolution of Cu Nanostructures During High-Pressure Thermal Evaporation
Eunji Lee, Woomi Gwon, Sangwoo Ryu
Korean J. Met. Mater. ;59(2):135-141.   Published online 2021 Jan 27
DOI: https://doi.org/10.3365/KJMM.2021.59.2.135

Abstract
The formation of porous material structures has been widely investigated for the development of high-performance energy materials, catalysts, and chemical sensing devices. Various nanoporous structure fabrication methods are based on wet-chemical processes, which require precise control of the process parameters. Physical vapor deposition such as thermal evaporation utilizes high vacuum..... More

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