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전도성 고분자를 이용한 연료전지용 비백금 촉매의 특성화 정량
김현종 ( Hun Jong Kim ),이효준 ( Hyo June Lee ),안지은 ( Ji Eun Ahn ),김한성 ( Han Sung Kim ),이호년 ( Ho Nyun Lee ) 한국공업화학회 2011 응용화학 Vol.15 No.2
Excellent active and stable platinum catalyst fuel cells currently being used as a catalyst. However, because of the high price of platinum catalyst, such as non-precious catalyst has been studied by a variety of fuel cell catalysts. In this study, Co/ PANi//CNT composite catalyst after synthesis through various heating process was to increase the activity of the catalyst. At 700℃ showed the best catalytic activity, using a composite catalyst was to be used as cathode electrodes in fuel cell.
김영춘(Young-Choon Kim),주해종(Hae-Jong Joo),최만규(Man-Gyu Choi),조문택(Moon-Taek Cho),이세훈(Se-Hun, Lee),홍석주(Suck-Joo Hong),김현종(Hyun-Jong Kim),이종섭(Jong-Sup Lee) 한국산학기술학회 2015 한국산학기술학회 학술대회 Vol.2015 No.1
본 논문에서는 스마트 밴드에 PPG 센서를 탑재하여 사용자 운동에 따른 심박수를 검출하여 운동 부하 등을 측정하였다. Photo Plethysmography(PPG)는 특정 파장 대역의 빛을 인체에 조사하고 반사 또는 투과된 광을 검출한 신호로 심장박동에 따라 발생하는 맥동성분을 나타내는 신호로 2개의 LED가 탑재된 모듈을 적용하였다.
알루미늄이 도핑 된 산화아연 나노입자의 합성에 관한 연구
신치호 ( Chi Ho Shin ),김현종 ( Hun Jong Kim ),이호년 ( Ho Yen Lee ),한명근 ( M. K. Han ),신태욱 ( T. W. Shin ),임병태 ( B. T. Lim ) 한국공업화학회 2010 응용화학 Vol.14 No.1
Zinc oxide (ZnO) has attracted much attention for a long time since it shows wide range of application such as ultra-violet absorbents, photocatalysts, photo-detector, and transistors, due to its wide band gap (3.37 eV) and large exciton binding energy (60 mV). Wide varieties of synthesis techniques have thus been developed to produce this material in different forms. They are, for instance, sol-gel process, hydrothermal process, hydrothermal process, and chemical vapor deposition. The wide band gap of ZnO can be reduced by controllably introducing non-stoichiometry and/or appropriate dopants for actual application in photocatalysts working at visible range. Recently, doping of ZnO could be achieved by replacing Zn2+ions with the ions of elements of higher valency such as Ga, Al, Co and In, or with the ions of transition metals, which was inducing drastic changes in its electrical and optical properties. ZnO and Aluminum doped ZnO particles were prepared by polyol process in different conditions. The effect of zinc concentration and dopant on structural, morphological, optical properties was investigated.
비백금 연료전지 촉매로서의 Co/PANi/CNT 합성 및 특성
이효준 ( Hyo June Lee ),안지은 ( Ji Eun Ahn ),김현종 ( Hun Jong Kim ),한명근 ( M. K. Han ),김한성 ( Hang Sung Kim ),이헌우 ( H. W. Lee ) 한국공업화학회 2011 응용화학 Vol.15 No.1
Platinum catalyst activity and stability is excellent in terms of fuel cells as a catalyst here. Although it is widely used, to compensate for the high price issue non-precious fuel cell catalysts are being developed. In this study, Co/PANi/CNT composite and non-precious as a catalyst for oxygen reduction was applied. Polyaniline on the interaction between cobalt and the oxygen reduction reaction and the structural characteristics observed in the impact and heat treatment was carried out according to the improved catalytic performance. Potential range is oxygen reduction reaction 0.55 V to 0.78 V(vs. NHE) after pyrolysis. Through this study, Co /PANi/CNT composites as a potential catalyst for fuel cells were non-precious.