Yonsei University · Materials Science
Professor Jae-Oh Shim's research lab specializes in the design and synthesis of advanced nanomaterials for sustainable energy applications, with a primary focus on catalysis for clean energy conversion. The lab investigates platinum-based and transition metal oxide catalysts—particularly those involving ceria-zirconia solid solutions—for key reactions such as the water-gas shift (WGS) and deoxygenation processes essential for renewable fuel production. Emphasis is placed on optimizing catalyst morphology, metal dispersion, and oxygen vacancy engineering to enhance activity, stability, and resistance to sintering. The lab also explores waste-to-energy conversion and solvent-free processes to improve the efficiency and sustainability of biofuel and hydrogen production technologies.
Figures are computed from collected data and may differ slightly.
The key factors (Pt<sup>0</sup> dispersion & oxygen vacancies) should maintain high values to attain high catalytic activity and they are directly affected by the morphology and the preparation method of the catalyst.
Multishelled, Pt-loaded Ce0.75Zr0.25O2 yolk-shell microspheres were prepared by a simple spray pyrolysis process for use in the water-gas shift (WGS) reaction. The Pt-loading was optimized, obtaining highly active Pt/Ce0.75Zr0.25O2 yolk-shell nanostructures for the WGS. Of the prepared catalysts, a 2% Pt loading of the Ce0.75Zr0.25O2 yolk-shell microspheres showed the highest CO conversion. The high catalytic activity of the 2% Pt/Ce0.75Zr0.2O2 catalyst was mainly due to its easier reducibility
Waste to energy technology is attracting attention to overcome the upcoming environmental and energy issues. One of the key-steps is the water-gas shift (WGS) reaction, which can convert the waste-derived synthesis gas (H2 and CO) to pure hydrogen. Co–CeO2 catalysts were synthesized by the different methods to derive the optimal synthetic method and to investigate the effect of the preparation method on the physicochemical characteristics of Co–CeO2 catalysts in the high-temperature water-gas sh
Biofuel is an eco-friendly fuel that can reduce CO2 emissions by 65% compared to using petroleum-based fuels. The commercialized biodiesel, which contains oxygen atom within its molecules, is only used in blends with petroleum-based diesel, but renewable diesel, diesel-like hydrocarbons, can completely substitute petroleum-based fuels. However, in the deoxygenation process to produce renewable diesel and jet fuel, solvents are injected to enhance the physical properties of reactants and the supp
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