향류확산법으로 제조한 Pt-SPE 복합체에서의 백금의 농도분포

강문식; 조영일; Mun-Sik Kang; Yung-il Joe

HWAHAK KONGHAK, Vol.38, No.1, 47-52, February, 2000

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향류확산법으로 제조한 Pt-SPE 복합체에서의 백금의 농도분포

The Pt Concentration Profiles in Pt-SPE Composite Made by Counter-current Diffusion

강문식, 조영일 ^{1, †}

플로리다 대학교 화학과
¹연세대학교 공과대학 화학공학과

Mun-Sik Kang, and Yung-il Joe^{1, †}

Department of Chemistry, University of Florida, USA
¹Department of Chemical Engingeering, College of Engineering, Yonsei University, Korea

E-mail:

초록

항류확산법에 의해 염화백금산 수용액과 환원제인 붕소산나트륨을 사용하여 제조한 Pt-SPE의 막(membrane)내에서의 백금의 농도 분포를 설명하기 위한 수학적 모델식으로부터 구한 값과 실험에 의해 제조한 Pt-SPE의 막내 농도 분포를 비교하였다. 모델식의 해석에 필요한 확산계수는 투과실험을 통하여 측정하였다. 이로부터 전극물질의 담지위치를 예측할 수 있으며, Pt-SPE 복합체는 전극물질과 환원제의 상대적 확산계수가 작은 전극물질쪽에서 형성되는 것으로 나타났다.

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 reductant is lower.

Keywords:Hydrogen Production;Pt-SPE;Mathematical Model;Electrode Material;Concentration Profile

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[Related Articles]

[1] Millet P, Durand R, Pineri M, Int. J. Hydrog. Energy, 15, 245 (1990)

[2] Millet P, Alleau T, Durand R, J. Appl. Electrochem., 23, 322 (1993)

[3] Sakai T, Kawami Y, Takenaka H, Torikai E, J. Electrochem. Soc., 137, 12 (1990)

[4] Takenaka H, Torikai E, Kawami Y, Wakabayashi N, Int. J. Hydrog. Energy, 7, 5 (1982)

[5] Eames DJ, Newman J, J. Electrochem. Soc., 142(11), 3619 (1995)

[6] Bjornbom P, Electrochim. Acta, 32, 1 (1987)

[7] Her WH, Fedkiw PS, J. Electrochem. Soc., 136, 3 (1989)

[8] Holze R, Ahn J, J. Membr. Sci., 73, 87 (1992)

[9] Manring LE, Mazur S, J. Phys. Chem., 90, 14 (1986)

[10] Manring LE, Polym. Commun., 28, 68 (1987)

[11] Manring LE, Dee GT, Mazur S, Polym. Preprint, 27, 50 (1986)

[12] Mazur S, Reich S, J. Phys. Chem., 90, 7 (1986)

[13] Reich S, Mazur S, Avakian P, Wilson FC, J. Appl. Phys., 62, 1 (1987)

[14] Dee GT, Phys. Rev. Lett., 57, 3 (1986)

[15] Dee GT, Manring LE, Mazur S, J. Phys. Chem., 91, 27 (1987)

[16] Mueller KF, Science, 225, 1021 (1984)

[17] Pucar Z, Pokric B, Graovac A, Anal. Chem., 46, 3 (1974)

[18] Kang MS, Joe YI, J. Power Sources, 77(1), 49 (1999)

[19] Ogumi Z, Takehara Z, Yoshizawa S, J. Electrochem. Soc., 131, 4 (1984)

[20] Yeo RS, McBreen J, J. Electrochem. Soc., 126, 10 (1979)

[21] Lopez M, Kipling B, Yeager HL, Anal. Chem., 49, 4 (1977)

[22] Paul DR, Garcin M, Garmon WE, J. Appl. Polym. Sci., 20, 609 (1976)

[23] Dewulf DW, Bard AJ, J. Electrochem. Soc., 135, 8 (1988)

[24] IMSL MATH/LIBRARY, Problem-Solving Software Systems, Vol. 2-2

[25] Aramata A, Nakajima H, Fujikawa K, Kita H, Electrochim. Acta, 28, 6 (1993)

[26] Aramata A, Ohnishi R, J. Am. Chem. Soc., 105, 3 (1983)

[27] Liu R, Her WW, Fedkiw PS, J. Electrochem. Soc., 139, 1 (1992)

[28] Kita H, Fukikawa K, Nakajima H, Electrochim. Acta, 29, 12 (1984)

[29] Schelly ZA, Szamosi J, Liesegang GW, J. Phys. Chem., 89, 9 (1985)