이산화납전극을 이용한 전기 화학적 오존발생에 관한 연구

이병호; 정영진; 이충영; 남종우

HWAHAK KONGHAK, Vol.33, No.1, 39-45, February, 1995

Export Citation

이산화납전극을 이용한 전기 화학적 오존발생에 관한 연구

A study on the Electrolytic Ozone Generation Using Lead Dioxide Electrode

이병호, 정영진, 이충영, 남종우

초록

전기분해에 의해 오존을 발생시킬 경우 높은 전류효율을 갖는 전극을 제조하기 위하여 각종 금속산화물 전극과 전해질 용해 중에서 오존발생 반응에 대해 조사하였다. 이산화납전극은 산소과전압이 낮음에도 불구하고 높은 오존발생 전류효율을 나타내었으며 전해질 용액 중 가장 높은 전위를 갖는 인산용액 중에서 높은 오존발생 전류효율을 나타냈다. 오존발생 반응은 전극재료에 따른 촉매능 뿐만 아니라 산소과전압의 크기에 의존함을 알수 있었다. 전해시간에 따른 이산화납전극의 성능과 내구성을 검토하였다. 이산화납전극은 중성의 인산염용액 중에서 높은 오존발생 전류효율과 내구성을 가짐을 확인하였다.

To fabricate the electrode having high current efficiency for electrolytic ozone generation, the reaction of ozone generation was investigated for various metallic oxide electrodes and electrolytes. Although the lead dioxide electrode had a low oxygen overvoltage, it showed high current efficiency for ozone generation. The high current efficiency for ozone generation was observed in phosphoric acid with the highest potential among electrolytes. It was found that the reaction of ozone generation depends on not only the catalytic ability of electrode material but also the oxygen overvoltage. The performance and durability of lead dioxide electrode were investigated as a function of electrolysis time. It was confirmed that the lead dioxide electrode had high current efficiency for ozone generation and long durability in neutral phosphate solution.

[References]

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[1] David BLA, Brink DR, "Ozone in Water Treatment; Application and Engineering," Lewis Publishers, London (1991)

[2] Lankford PW, Eckenfelder WW, "Toxicity Reduction in Industrial Effluents," Van Nostrand Reinhold, NY (1990)

[3] Schonbein CF, Poggendorffs Annal., 50, 616 (1840)

[4] Putnam GL, Moulton RW, Fillmore WW, Clark LH, J. Electrochem. Soc., 93, 211 (1948)

[5] Seader JD, Tobias CW, Ind. Eng. Chem., 44, 2207 (1952)

[6] Semchenko DP, Lybushkin VI, Lybushkina ET, Sov. Electrochem., 9, 1744 (1973)

[7] Foller PC, Tobias CW, J. Electrochem. Soc., 129, 506 (1982)

[8] Foller PC, Tobias CW, J. Electrochem. Soc., 129, 567 (1982)

[9] Thanos JCG, Wabner DW, J. Electroanal. Chem., 182, 37 (1985)

[10] Trasatti S, "Electrodes of Conductive Metallic Oxides," Elsevier, Amsterdam (1981)

[11] Kasatkin EV, Rozental KI, Yokovieva AA, Veselovskii VI, Sov. Electrochem., 5, 127 (1969)

[12] Sbibata S, Sumino MP, Electrochim. Acta, 16, 1089 (1971)

[13] Chang H, Johnson DC, J. Electrochem. Soc., 136, 17 (1989)

[14] American Public Health Association, American Water Works Association, American Pollution Control Federation: "Standard Methods for the Examination of Water and Wastewater," Port City Press, 17th Edition, p. 4-162, Baltimore (1989)