Electrochemical Oscillations in the HCHO Oxidation on a Pt Electrode

Inhwa Jung; Doyeon Kim; Jaeyoung Lee; In-Hwan Oh; Heung Yong Ha; Yongsug Tak

Journal of Industrial and Engineering Chemistry, Vol.9, No.2, 159-162, March, 2003

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Electrochemical Oscillations in the HCHO Oxidation on a Pt Electrode

Inhwa Jung, Doyeon Kim, Jaeyoung Lee¹, In-Hwan Oh², Heung Yong Ha², and Yongsug Tak^†

Department of Chemical Engineering, Inha University, Inchon 402-751, Korea
¹Water Production Research Team, Research Institute of Industrial Science & Techonology, Pohang, Kyungbuk 790-330, Korea
²Fuel Cell Research Center, Korea Institute of Science and Technology, Cheongryang, Seoul 130-650, Korea

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We first report that current oscillations with in-situ mass oscillations in the electrocatalytic oxidation of formaldehyde were observed on a Pt electrode. In the linear sweep voltammogram, quantitative analysis of in-situ mass change on the Pt surface by electrochemical quartz crystal microbalance gave a clue that CO might be the reaction intermediate species, which covered the active area of Pt surface. It results in the lowest current and the highest mass in a period of oscillations. On the other hand, the lowest value of mass arises from the recover of Pt vacant site due to the CO2 evolution. The periodicity of current oscillations is in excellent agreement with the mass oscillations.

Keywords:formaldehyde;electro-oxidation;hopf instability;current and mass oscillations;in-situ electrochemical quartz crystal microbalance

[References]

Lipkowski J, Ross PN, Electrocatalysis, Wiley-VCH, New York (1998)
Vielstich W, Fuel Cells, Wiley-Interscience, London (1965)
Nakabayashi S, Yagi I, Sugiyama N, Tamura K, Ousaki K, Surf. Sci., 386, 82 (1997)
Krischer K, Principles of Temporal and Spatial Pattern Formation in Electrochemical Systems, in Modern Aspects in Electrochemistry Vol. 32, J.O. Bockris, B. Conway, and R.E. White Eds., Plenum Press, New York (1999)
Hudson JL, Tsotsis TT, Chem. Eng. Sci., 49(10), 1493 (1994)
Horanyi G, Inzelt G, Szetey EJ, J. Electroanal. Chem., 81, 395 (1977)
Okamoto H, Electrochim. Acta, 37, 37 (1992)
Lee J, Eickes C, Eiswirth M, Ertl G, Electrochim. Acta, 47(13-14), 2297 (2002)
Inzelt G, J. Electroanal. Chem., 348, 465 (1993)
Kertesz V, Inzelt G, Barbero C, Kotz R, Haas O, J. Electroanal. Chem., 392(1-2), 91 (1995)
Beden HB, Lamy C, J. Electroanal. Chem., 287, 81 (1990)
Krausa M, Vielstich W, J. Electroanal. Chem., 399(1-2), 7 (1995)
Lee J, Christoph J, Strasser P, Eiswirth M, Ertl G, J. Chem. Phys., 115(3), 1485 (2001)
Albahadily FN, Schell M, J. Electroanal. Chem., 308, 151 (1991)
Buttry DA, Ward MD, Chem. Rev., 92, 1355 (1992)
Jackman TE, Davies JA, Jackson DP, Unertl WN, Norton PR, Surf. Sci., 120, 389 (1982)
Koper MT, J. Electroanal. Chem., 409(1-2), 175 (1996)
Strasser P, Eiswirth M, Koper MTM, J. Electroanal. Chem., 478(1-2), 50 (1999)
Koper MT, Sluyters JH, J. Electroanal. Chem., 371(1-2), 149 (1994)
Lee J, Noh TG, Tak Y, J. Ind. Eng. Chem., 8(5), 454 (2002)

[Referenced By]

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[1] Lipkowski J, Ross PN, Electrocatalysis, Wiley-VCH, New York (1998)

[2] Vielstich W, Fuel Cells, Wiley-Interscience, London (1965)

[3] Nakabayashi S, Yagi I, Sugiyama N, Tamura K, Ousaki K, Surf. Sci., 386, 82 (1997)

[4] Krischer K, Principles of Temporal and Spatial Pattern Formation in Electrochemical Systems, in Modern Aspects in Electrochemistry Vol. 32, J.O. Bockris, B. Conway, and R.E. White Eds., Plenum Press, New York (1999)

[5] Hudson JL, Tsotsis TT, Chem. Eng. Sci., 49(10), 1493 (1994)

[6] Horanyi G, Inzelt G, Szetey EJ, J. Electroanal. Chem., 81, 395 (1977)

[7] Okamoto H, Electrochim. Acta, 37, 37 (1992)

[8] Lee J, Eickes C, Eiswirth M, Ertl G, Electrochim. Acta, 47(13-14), 2297 (2002)

[9] Inzelt G, J. Electroanal. Chem., 348, 465 (1993)

[10] Kertesz V, Inzelt G, Barbero C, Kotz R, Haas O, J. Electroanal. Chem., 392(1-2), 91 (1995)

[11] Beden HB, Lamy C, J. Electroanal. Chem., 287, 81 (1990)

[12] Krausa M, Vielstich W, J. Electroanal. Chem., 399(1-2), 7 (1995)

[13] Lee J, Christoph J, Strasser P, Eiswirth M, Ertl G, J. Chem. Phys., 115(3), 1485 (2001)

[14] Albahadily FN, Schell M, J. Electroanal. Chem., 308, 151 (1991)

[15] Buttry DA, Ward MD, Chem. Rev., 92, 1355 (1992)

[16] Jackman TE, Davies JA, Jackson DP, Unertl WN, Norton PR, Surf. Sci., 120, 389 (1982)

[17] Koper MT, J. Electroanal. Chem., 409(1-2), 175 (1996)

[18] Strasser P, Eiswirth M, Koper MTM, J. Electroanal. Chem., 478(1-2), 50 (1999)

[19] Koper MT, Sluyters JH, J. Electroanal. Chem., 371(1-2), 149 (1994)

[20] Lee J, Noh TG, Tak Y, J. Ind. Eng. Chem., 8(5), 454 (2002)