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RuO2-SuO2-IrO2/Ti계 혼합산화물 전극의 양극산화 특성
Anodic Oxidation Characteristics of RuO2-SnO2-IrO2/Ti type Mixed Oxide Electrode
HWAHAK KONGHAK, February 1996, 34(1), 135-141(7), NONE
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Abstract
Chloro-alkali 산업에 이용하기 위하여 낮은 산소과전압과 높은 내구성을 가진 RuO2-SnO2/Ti계 혼합산화물 전극의 양극산화특성을 조사하였다. 이 전극의 전기화학적 특성은 산성용액에서 Tafel plot와 분극곡선으로 측정되었으며, 전해석출 반응에서 실제 전극으로의 적용을 검토하기 위해 ZnSO4 전해질 용액 중에서 전극의 장시간 사용에 따른 안정성을 조사하였다. 이 결과 20mole%의 SnO2를 함유한 혼합산화물 전극이 기존의 RuO2 전극보다 낮은 산소발생 과전압을 나타내었다. 또한 SnO2의 첨가로 안정성을 증가시켰다.
Anodic oxidation characteristics of RuO2-SnO2-IrO2/Ti type mixed oxide electrode was investigated to find a new type electrode with the lower oxygen overpotential and higher stability for chloro-alkali industrial use. Electrochemical characteristics of this electrode are measured by Tafel plot and polarization curves in acidic solution, and for the application as real electrode in industrial electrolysis, stability of electrode in ZnSO4 solution by using the long time was investigated. Mixed oxide electrode containing SnO2 of 20mol% exhibited oxygen evolution overpo-tential much lower than that on previous RuO2 film electrodes. Also the addition to SnO2 increased the stability.
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Iwakura C, Harao K, Tamura H, Electrochim. Acta, 23, 329 (1977)
Loutzy RO, Leroy RL, J. Appl. Electrochem., 8, 549 (1978)
Hine F, Yasuda M, Yoshida T, J. Electrochem. Soc., 124, 211 (1977)
Loucka T, J. Appl. Electrochem., 7, 211 (1977)
Loucka T, J. Appl. Electrochem., 11, 143 (1977)
Angelimetta G, Trasatti S, Atanasosdka LJD, Minevski ZS, Atanasoski RT, Mater. Chem. Phys., 22, 231 (1989)
Liszi J, Barbieristi A, deBattisti A, J. Appl. Electrochem., 23, 615 (1993)
deBattisti A, Brina R, Gavelli G, Benedetti A, Fagherazzi G, J. Electroanal. Chem., 200, 93 (1985)
Comninellis C, Vercesi GP, J. Appl. Electrochem., 21, 335 (1991)
Burke LD, McCarthy M, Electrochim. Acta, 29, 211 (1984)
Pourbaix M, "Atlas of Electrochemical Equilibria in Aqueous Solutions," Nat. Assoc. of Corr. Eng., pp. 343 (1974)
Kuhn AT, Mortimer CJ, J. Electrochem. Soc., 120, 231 (1973)
Galizzioli D, Tantardini F, Trasatti S, J. Appl. Electrochem., 4, 57 (1974)
Pizzni S, Buzzanka G, Mari C, Rossi L, Torchio S, Mater. Res. Bull., 7, 449 (1972)
Doblhofer K, Metikos M, Ogumi Z, Gerisher H, Ber. Bunsenges. Phys. Chem., 82, 1046 (1978)
Lodi G, Bighi C, DeAsmundis C, Mater. Chem., 1, 177 (1976)
Bockris J, Reddy A, "Modern Electrochemistry," N.Y., p. 862 (1970)
