Abstract:
PURPOSE: Provided is a supported ceramic on metal catalyst for water gas shift reaction, in which the catalyst has higher catalytic activity and thermal stability than supported metal on ceramic catalyst, and further provided is a method for preparing the same. CONSTITUTION: The catalyst comprises metal carrier such as gold, silver, copper, nickel, zinc, chrome and aluminum and ceramics supported on the metal carrier, wherein the ceramic is ceria, zirconia, bismuth, perovskite or bismuth oxides. The method comprises the steps of (a) on one or more metal selected from a group consisted of gold, silver, copper, nickel, zinc, chrome and aluminum, supporting ceramics based on ceria, zirconia, bismuth, perovskite or bismuth oxides, (b) drying the ceramics supported on metal at room temperature, (c) oxidizing the ceramics at a temperature of 500 to 1000°C, and (d) reducing the ceramic on metal at a temperature of 300 to 450°C in hydrogen ambient.
Abstract:
The present invention relates to a method of synthesizing nano-sized metal and alloy nanoparticles by depositing metal and alloy nanoparticles having excellent uniformity of particle size on the surface of powder which is a parental material using a vapor deposition method, and melting the parental material by a solvent or heat, and to a production device thereof. More specifically, as an effective and inexpensive synthesizing method for solving a multiple and high-priced synthesizing method using chemical reduction reaction which is demerits of an existing method, provided are a method of synthesizing highly uniform sized metal, metal supported to alloy catalyst nanoparticles and carbon, and alloy catalyst nanoparticles and a production device thereof.
Abstract:
The present invention relates to a cobalt-phosphorus (Co-P), cobalt-boron (Co-B) catalyst containing phosphorous and boron and a method for producing the same. More specifically, a Co-P and Co-B anode catalyst containing phosphorous having high catalyst efficiency during a hydrogen oxidation reaction (HOR) in an alkali solution for an anode of an alkali fuel cell (AFC) is produced through electro plating and electroless plating techniques. The Co-P and Co-B anode catalyst of the present invention exhibits a much faster hydrogenation speed than an existing nickel and alloy catalyst. The Co-P and Co-B catalyst of the present invention is a material having high catalyst activity in an HOR of an anode of an AFC. The cost is low and the HOR is highly effective so that the Co-P and Co-B catalyst can replace precious metal catalysts (platinum) and nickel catalysts. Processes are simple, making commercialization of the Co-P and Co-B catalyst highly possible.
Abstract:
The present invention relates to a polymer electrolyte membrane fuel cell containing a complex catalyst in which an alloy or a mixture of phosphoric acid-doped polyimidazole based electrolyte thin film, metals, and chalcogen elements are deposited on a carbon carrier. According to the present invention, a user can utilize the polymer electrolyte membrane fuel cell with an improved tenacity, power generation efficiency, and stability in a high temperature operation, and use a simple production method of the complex catalyst included in the present invention.
Abstract:
세리아 또는 금속 도핑된 세리아 및 리튬 염, 나아가 산화 비스무스로 이루어지는 세리아계 조성물, 세리아계 복합 전해질 분말 및 이를 이용한 소결 방법 및 소결체가 제공된다. 일예로서 상기 리튬 염은 세리아계 조성물에 대하여 0 중량% 초과 5 중량% 이하로, 산화 비스무스는 0 중량% 초과 10 중량% 이하로 포함된다. 세리아계 물질에 저융점 및/또는 휘발성의 화합물들을 첨가함으로써, 소결 온도를 낮출 수 있으며, 세리아계 단독으로 사용하는 경우의 기존 소결 온도인 1500℃ 보다 훨씬 낮은 저온 예컨대 1000℃ 이하에서도 높은 복합체 소결 밀도 예컨대 95% 이상의 소결 밀도를 확보할 수 있다.
Abstract:
신규한 고분자 전해질 물질로서, 폴리벤지이미다졸에 벤족사졸 단위를 도입한 폴리(벤지이미다졸-코-벤족사졸)을 제공한다. 해당 고분자 전해질 물질은 특히 인시츄로 인산 도핑되어 제조되는 경우라도 높은 프로톤 전도도를 가지면서도 기계적 특성이 동시에 우수하다. 따라서 고분자 전해질 막 연료전지 특히 고온 고분자 전해질 막 연료전지에서 기존의 인산 도핑된 폴리벤지이미다졸을 대체할 수 있다.
Abstract:
A novel alkyl chain modified sulfonated polyether sulfone copolymer and a manufacturing method thereof are provided. The alkyl chain modified sulfonated polyether sulfone copolymer has high thermal stability and mechanical stability, is economic, and has low methanol penetration, excellent proton conductivity, and excellent water absorption, thereby being useful for the commercialization of fuel cells such as a polymer electrolyte membrane fuel cell or a direct methanol fuel cell by replacing conventional Nafion.