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장종산,Jae Oak Ryu,Jong Min Lee,박상언,홍도영,정성화 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.10
Catalytic properties of Ni-ZrO2 catalysts prepared by coprecipitation have been studied for the gas-phase hydrogenation of 1,3-butadiene to butenes. The coprecipitation method led to the solid solution of Ni-ZrO2, which contains highly resistant Ni species to thermal reduction with H2. Nickel species of the solid solution were highly dispersed in the ZrO2 lattice, so that the reduced catalysts were selective for hydrogenation of 1,3-butadiene to butenes (99.9%) even in the presence of 1-butene.
Nano-structured Materials for Hydrogen Storage
장종산,박상언 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0
The development of enhanced materials for hydrogen storage is one of the main challenges in the drive to replace gasoline combustion engines by hydrogen fuel cells. Two main classes of materials are currently being explored: (i) sorbents that store hydrogen in its molecular form and (ii) metal hydrides that undergo reversible chemisorption with hydrogen. Carbon nanotubes show impressive hydrogen storage capacities, but their cost and availability are major issues and different groups have reported widely differing adsorption resists. More conventional molecular sieves, on the other hand, such as activated carbons and aluminosilicate zeolites, have capacities that are currently insufficient for automotive fuel cell applications. Therefore, the challenge is to design nano-structured materials to exhibit nice characteristics for hydrogen adsorption-desorption as well as high storage capacity of hydrogen molecule. This presentation is dealing with current status of hydrogen storage materials and the possibility of new materials as an unexplored class of materials for hydrogen storage.
Photoinduced Superhydrophilicity in TiO2 Thin Films Modified with WO3
장종산,Kashinath Rangu Patil,김혜경,Shivaram Dattatraya Sathaye,황진수,박상언,황영규 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.10
Tungsten oxide-modified TiO2 thin films were formed on a glass substrate by sol-gel and dip coating processes using acetyl acetone as a chelating agent. The hydrophilic properties of the thin films were investigated with illumination of UV light. The dependence of water contact angle on material composition and morphology of the film is established with SEM image and AFM profile. The surface morphology was controlled with the change of precursor concentration. 0.01 M of tungsten oxide-modified TiO2 have shown the highest hydrophilicity after UV-irradiation. The effect of composition on photoinduced hydrophilicity of the WO3-TiO2 films was also investigated. The films were characterized by XRD, SEM, AFM and XPS.