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Dergiler / Turkish Journal of Chemistry / 2007 / Cilt: 31 - Sayı: 5

A Mechanistic Approach to Elucidate Ethanol Electro-oxidation

Niyazi Alper TAPAN
Sayfa
427–443
Yayın Tarihi
2007-05-01
DOI
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

Surface species profiles of the proposed model show that C2 type species play an important role in ethanol electro-oxidation.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:In order to elucidate the mechanism of ethanol oxidation, a simple cylindrical diffusion-surface reaction was developed on a platinum disk electrode.
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Temel Bulgular & Veri:An ethanol electro-oxidation mechanism was proposed, in which electrochemical reactions proceed without adsorption of any electro-oxidation products (C2 type) on the surface.
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Sonuç & Katkı:Surface species profiles of the proposed model show that C2 type species play an important role in ethanol electro-oxidation.
🔬Tür:Modelleme & Sayısal Simülasyon
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Ethanol · electro-oxidation · mechanism

Özet

In order to elucidate the mechanism of ethanol oxidation, a simple cylindrical diffusion-surface reaction was developed on a platinum disk electrode. An ethanol electro-oxidation mechanism was proposed, in which electrochemical reactions proceed without adsorption of any electro-oxidation products (C2 type) on the surface. After the simulation of the proposed mechanism, it was seen that the model can explain ethanol electro-oxidation behavior without any surface CO formation. The simulation of the mechanism indicated that the formation of acetaldehyde through the oxidation of bulk ethanol is the rate determining step between 0.6 and 0.75 V vs. RHE. After 0.75 V vs. RHE, the formation of surface acetate through bulk ethanol becomes the rate determining step. According to the proposed oxidation model, around 0.7 V vs. RHE, acetaldehyde coverage becomes the major surface species, and acetate formation starts around 0.7 V vs. RHE. Surface species profiles of the proposed model show that C2 type species play an important role in ethanol electro-oxidation.

Abstract

In order to elucidate the mechanism of ethanol oxidation, a simple cylindrical diffusion-surface reaction was developed on a platinum disk electrode. An ethanol electro-oxidation mechanism was proposed, in which electrochemical reactions proceed without adsorption of any electro-oxidation products (C2 type) on the surface. After the simulation of the proposed mechanism, it was seen that the model can explain ethanol electro-oxidation behavior without any surface CO formation. The simulation of the mechanism indicated that the formation of acetaldehyde through the oxidation of bulk ethanol is the rate determining step between 0.6 and 0.75 V vs. RHE. After 0.75 V vs. RHE, the formation of surface acetate through bulk ethanol becomes the rate determining step. According to the proposed oxidation model, around 0.7 V vs. RHE, acetaldehyde coverage becomes the major surface species, and acetate formation starts around 0.7 V vs. RHE. Surface species profiles of the proposed model show that C2 type species play an important role in ethanol electro-oxidation.

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Bu Makaleye Atıf Yap

TAPAN, N. A. (2007). A Mechanistic Approach to Elucidate Ethanol Electro-oxidation. Turkish Journal of Chemistry, Cilt: 31 - Sayı: 5, 427–443. https://ajindex.com/articles/184896

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Kaynakça (24)

  1. W. Vielstich, “In fuel cells: Modern processes for the electrochemical production of energy” eds. D.J.G. Ives, Wiley-Interscience, New York, 1970.
  2. W. Zhou, S. Zhou, S. Song, W. Li, G. Sun, P. Tsiakaras and Q. Xin, Applied Catalysis B: Environmental, 273-285 (2003). A.J. Bard and L.R. Faulkner, “Electrochemical Methods: Fundamentals and Applications”, 2nded. John Wiley & Sons, 2001.
  3. F. Vigier, C. Countanceau, F. Hahn, E.M. Belgsir and C. Lamy, Journal of Electroanalytical Chemistry, 81-89 (2004).
  4. J.P.I. Souza, F.J.B. Rabelo, I.R. De Morales and F.C. Nort, Journal of Electroanalytical Chemistry 420, (1997).
  5. R. Ionniello, V.M. Schmidt, J.L. Rodriquez and E. Pastor, Journal of Electroanalytical Chemistry 471, (1999).
  6. N. Fujiwara, K.A. Friedrich and U. Stimming, Journal of Electroanalytical Chemistry 472, 120 (1999).
  7. H. Hitmi, E.M. Belgsir, J.M. Leger, C. Lamy and R.O. Lezna, Electrochimica Acta 39, 407 (1994). A. Constantinides and N. MostouŞ, “Numerical Methods for Chemical Engineers with MATLAB Applications”, Prentice-Hall, 1999.
  8. K. Okamoto, N. Hirota and M. Terazima, Journal of Physical Chemistry A, 102, 3447-3454 (1998).
  9. Y. Yu and G.H. Gao, Fluid Phase Equilibria 179, 165-179 (2001).
  10. M.L. Rosinberg, J.L. Lebowitz and L. Blum, Journal of Statistical Physics 44, 153 (1986).
  11. D.A. Huckaby and L. Blum, Journal of Chemical Physics 92, 2646 (1990).
  12. L. Blum and D.A. Huckaby, Journal of Chemical Physics 94, 6887 (1991).
  13. D.A. Huckaby, M.D. Legaultand L. Blum, Journal of Chemical Physics 109, 3600 (1998).
  14. L. Blum and D. Henderson, Journal of Chemical Physics 74, 1902 (1981).
  15. L. Blum, F. Vericat and W.R. Fawcett, Journal of Chemical Physics 96, 3039 (1992).
  16. L. Blum and W.R. Fawcett, Journal of Chemical Physics 97, 7185 (1993).
  17. Y. Shingaya and M. Ito, Surface Science 386, 34-47 (1997).
  18. M.H. Shao and R.R. Adzic, Electrochimica Acta 50, 2415-2422 (2005).
  19. G.A. Camara, R.B. Lima and T. Iwasita, Journal of Electroanalytical Chemistry, 585, 128 (2005).
  20. M. Bhattacharya, W.G. Devi and P.S. Mazumdar, Applied Surface Science 218, 1-6 (2003).
  21. O. Deutschmann, R. Schmidt, F. Behrendt and J. Warnatz, Twenty-Sixth International Symposium on Combustion, 1747-1754 (1996).
  22. O. Deutschmann, F. Behrendt, J. Warnatz, C.T. Goralski and L.D. Schmidt, Catalysis Today, 21, 461 (1994).
  23. M.A. Natal-Santiago, J.M. Hill and J.A. Dumesic, Journal of Molecular Catalysis A: Chemical, 140, 214 (1999).
  24. A.B. Anderson and T.V. Albu, Journal of The Electrochemical Society, 147, 4229-4238 (2000). K. Kinos