RuO2-SnO2-IrO2/Ti계 혼합산화물 전극의 양극산화에 대한 희토류원소의 영향

이진식; 이철태; 윤경석

HWAHAK KONGHAK, Vol.35, No.2, 168-172, April, 1997

Export Citation

RuO₂-SnO₂-IrO₂/Ti계 혼합산화물 전극의 양극산화에 대한 희토류원소의 영향

Effect of Rare Earth Element on the Anodic Oxidation Characteristics of RuO₂-SnO₂-IrO₂/Ti Type Mixed Oxide Electrode

이진식, 이철태, 윤경석

초록

RuO₂-SnO₂-IrO₂/Ti계 혼합산화물 전극에 여러 가지 희토류원소를 첨가하였을 경우 첨가함에 따라 낮은 산소발생 과전압과 좋은 내구성을 갖게 되었다. 그리고 희토류원소를 첨가하였을 경우 첨가하지 않았을 경우보다 모두 내구성이 향상되었으며, Ho₂O₃ > Sm₂O₃ > Er₂O₃ > Y₂O₃ > Nd₂O₃ > La₂O₃의 순서로 산소발생 과전압이 감소되었다. 또한 가장 낮은 산소발생 과전압을 나타낸 Ho₂O₃의 첨가량은 1wt%의 경우가 가장 좋았다.

Adding of rare earth elements such as Ho₂O₃, Sm₂O₃, Er₂O₃, Y₂O₃, Nd₂O₃, and La₂O₃, on the RuO₂-SnO₂-IrO₂/Ti mixed oxide electrode enhanced the durability of this mixed oxide electrode, respectively. In every case of the addition of various rare earth element, durability was enhanced and oxygen evolution overvoltage was decreased in order of Ho₂O₃ > Sm₂O₃ > Er₂O₃ > Y₂O₃ > Nd₂O₃ > La₂O₃. When 1wt% of Ho₂O₃ oxide was doped especially, the oxygen evolution overvoltage of that electrode become lower than that of the mixed oxide electrode itself.

Keywords:Mixed Oxide Electrode;Rare Earth Elements;Overvoltage

[References]

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[1] Fukuda K, Iwakura C, Tamura H, Electrochim. Acta, 23, 613 (1978)

[2] Arikado T, Iwakura C, Tamura H, Electrochim. Acta, 22, 513 (1977)

[3] Kuhn AT, Mortimer CJ, J. Appl. Electrochem., 2, 283 (1972)

[4] Noguchi F, Matsumura S, Mitamura T, Arai Y, Denki Kagaku, 52(5), 276 (1984)

[5] Trasatti S, Electrochim. Acta, 29(11), 1503 (1984)

[6] Rolewicz J, Plattner E, Hinden J, Electrochim. Acta, 33(4), 573 (1988)

[7] Matsumoto Y, Tazawa T, Muroi N, Sato F, J. Electrochem. Soc., 133(11), 2257 (1986)

[8] Battisti AD, Brina R, J. Electroanal. Chem., 200, 93 (1985)

[9] Azim AA, Kolta GA, Askar MH, Electrochim. Acta, 17, 291 (1972)

[10] Morita M, Iwakura C, Tamura H, Electrochim. Acta, 23, 331 (1978)

[11] Boodts JFC, Trasatti S, J. Electrochem. Soc., 137(12), 3784 (1990)

[12] Lee JS, Lee CT, Yun KS, HWAHAK KONGHAK, 34(1), 135 (1996)

[13] 김상철, "회토류금속의 제조와 응용," 산업기술원 (1989)

[14] Vlasov AN, Shulik IG, Sov. Electrochem., 26(7), 828 (1990)