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Development of Fuel Cell Catalyst Using Electron Beam Process
채근석,양대수,박현열,신종민,임소연 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Fuel cell catalyst is a key material for hydrogen fuel cells and currently commonly uses Pt and Pt alloys. The company is developing a process for manufacturing and mass-producing catalyst products using lowenergy electron-beam equipment. The electron beam process is a low-cost eco-friendly nanoparticle manufacturing process that produces metal nanoparticles by reducing the gilt ion by hydration electrons produced by investigating electron beams in aqueous solution without any chemical reductants. In here, we will introduce a simple manufacturing process for the preparation of metal nanoparticles by irradiating an electron beam to a metal precursor aqueous solution at room temperature.
Synthsis of metal nanoparticles using the electron beam irradiation
채근석 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
Metal nanoparticles have been intensively studied over last decade due to their various novel properties such as electronic, magnetic and catalytic properties. Recently, the electron irradiation technique has been developed for the synthesis of special nanostructures and nanomaterials. Metal nanoparticles could be prepared by reduction of metal ions by electron beam irradiation without any added chemical reductant. Reduction of metal ions occurs here by the species that are generated in the radiolysis of the aqueous solvents. This talk will be introduce a simple one-step method for synthesizing metal nanoparticles at room temperature by irradiation of a metal precursor aqueous solution using an electron beam.
강길성,이철호,이윤기,채근석,Doh C. Lee,이성호,조한익 한국고분자학회 2017 Macromolecular Research Vol.25 No.12
Highly durable platinum (Pt) catalysts for oxygen reduction reaction (ORR) were fabricated using pulverized isotropic pitch based activated carbon fibers as catalyst supports. We controlled the textural and structural properties of catalyst support by heat-treatment with various temperatures of 900, 1200, 1500, and 2000 oC. Crystallinity of the catalyst supports increased with increasing heat-treatment temperature, leading to an increase of conductivity. In addition, the catalytic activity and durability increased and the catalyst using carbon supports heat-treated at 1200 oC showed a comparable performance and superior durability to those of a commercial catalyst. It is suggested that an increase in crystallinity was attributed to prevent elimination of Pt and carbon support, which led to less degradation of catalytic activity and durability for ORR. This work showed the possibility of pitch based activated carbon fibers as a highly durable catalyst support.