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분체공학 유동층 재료 ( 무기 , 유기 , 고분자 ) / 향류확산법으로 제조한 Pt-SPE 복합체에서의 백금의 농도분포
강문식(Kang Mun Sik),조영일(Joe Yung Il) 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.1
The theoretical data, from the model equations for the description of the metallic platinum concentration profiles across the membrane, have been compared with experimental results obtained by electron dispersive microanalysis spectroscope. The diffusivity data for the model analysis are obtained from permeation test using diffusion cell consisted by two compartments. From the results, we could be predict the location of deposition of electrode material. The Pt-SPE composites were deposited at the location where relative diffusivity between electrode material and reluctant is lower.
수소 생산을 위한 SPE - 전극촉매의 제조법에 따른 성능비교
강문식(Mun Sik Kang),한학수(Hak Soo Han),설용건(Yong Gun Shul),조영일(Yung Il Joe),채재근(Jae Keun Chae),오정훈(Jeong Hun Oh),심규성(Kyu Sung Sim) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.2
We were prepared SPE-composites with reductant penetrating method and impregnation-reduction method. And its characteristic properties were investigated by morphological analysis, electrochemical experiment and water electrolysis. As a result of the morphological analysis, Pt of SPE-composites prepared by reductant penetrating and impregnation-reduction method was deposited outward, inward respectively. From the electrochemical experiment, reductant penetrating method is better than impregnation-reduction method. As a result of water electrolysis, we confirmed that reductant penetrating method is better.
물 전기분해용 SPE-composites의 제조 및 특성 고찰
강문식(Mun Sik Kang),오정훈(Jeong Hun Oh),심규성(Kyu Sung Sim),한학수(Hak Soo Han),설용건(Young Gun Shul),조영일(Yung Il Joe) 한국수소및신에너지학회 1995 한국수소 및 신에너지학회논문집 Vol.6 No.2
SPE-composites which was prepared with impregnation-reduction method for hydroen production were investigated with morphological and electrochemical analysis. As Pt reagent`s concentration increased, Pt loadings increased. However, reductant`s concentration had a little effect on Pt loadings. By the morphological analysis, it was found that Pt was deposited inside of SPE. Furthermore, with electrochemical analysis, we found that Pt loading, electricity, roughness factor and active surface area were 2.05 mg/cm², 14.20 mC, 21.55, 10.51 cm²/mg respectively at reducing agent concentration 0.05 ?/L. Therefore, we found the deposited Pt inside of SPE would give an effect on electrical characteristics of SPE-composites.
물 전기분해용 Pt-SPE 전극촉매의 제조에 관한 연구 (1) - 담지시간에 따른 영향 -
강문식(Mun Sik Kang),김지윤(Ji Yun Kim),조영일(Yung Il Joe) 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.1
Nafion 117 membrane was used as the solid polymer electrolyte (SPE) and, H₂PtCl_6 and NaBH₄ were used as the electrode material and reducing agent, respectively. The effect of the deposition time was investigated on morphological, electrochemical characteristics and water electrolysis performance of prepared Pt-SPE composite. In water electrolysis performance, the cell voltage decreased as the deposition time increased. At 60 min, the cell voltage showed a minimal value of 2.7 V at a curtent density 1 A/㎠ and 80 ℃.
채재근,강문식,한학수,설용건,조영일 ( Jae Keun Chae,Mun Sik Kang,Hak Soo Han,Yong Gun Shul,Yung Il Joe ) 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.6
SPE electrocatalysts were made by reducing agent penetrating method. Pt loading, morphological, and electrochemical characteristics and cell voltage properties were investigated. The amount of Pt loading increased upto the reducing agent concentration of 1.0 ㏖/L and then decreased. At that concentration, the amount of Pt loading was the most, 3.56㎎/㎠ and Pt layer was the thickest. The largest electricity and roughness factor from cyclic voltammogram were 284.92 mC and 1356.75 respectively at the reducing agent concentration 1.0 ㏖/L. But surface area per unit weight of Pt was somewhat lower. As the amount of Pt loading increased, cell voltage became lower. At the amount of Pt loading 3.56㎎/㎠, current density 1 A/㎠, and temperature 25℃ it was the lowest, 3.0 V. As temperature increased, cell voltage became lower. Cell voltages at 50℃, 80℃ were 2.9 V, 2.7 V respectively under the condition of 3.56 ㎎/㎠, 1 A/㎠, It was at the reducing agent concentration 1.0 ㏖/L.