SciELO - Scientific Electronic Library Online

 
vol.22 issue4Corrosion Rate Evaluation of the Copper Cable Used in Grounding Systems at the ICE - Costa RicaTopographic Characterization of Disposable Carbon Pencil Modified Electrodes author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • Have no similar articlesSimilars in SciELO

Share


Portugaliae Electrochimica Acta

Print version ISSN 0872-1904

Port. Electrochim. Acta vol.22 no.4 Coimbra  2004

 

Methanol Electrooxidation on Pt-Ru Catalysts Dispersed in Conducting Polyaniline Films

 

T. Kesslera, A.M. Castro Luna,b,*W.E. Triacab

 

a) Facultad de Ingeniería. Universidad Nacional del Centro de la Provincia de Buenos Aires, Avda. Del Valle 5737 (7400) Olavarría-Argentina.

b) Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Suc 4 CC 16 (1900) La Plata–Argentina.

 

Received 09 March 2004; accepted in revised form 12 May 2004

 

 

Abstract

Methanol electrooxidation was investigated on tailored Pt-Ru-polyaniline catalysts prepared applying dynamic potential routines. The electrodes characterized by SEM, EDX and TEM present a uniform distribution of metal particles about 100 nm in size, composed of Ru and Pt on the fibrous polymer matrix. The effect of concentration in the range 0.05-1 M and temperature in the range 20 to 60 ºC on the methanol electrooxidation rate was determined. The apparent activation energy depends on the catalyst Ru content.

 

Keywords: polyaniline, ruthenium, platinum, methanol oxidation, activation energy.

 

 

Texto completo disponível apenas em PDF.

Full text only available in PDF format.

 

 

References

1. H. Laborde, J.M. Leger, C. Lamy, J. Appl. Electrochem. 24 (1994) 1019.        [ Links ]

2. A.A. Mikhaylova, E.B. Molodkina, O.A. Khazova, V.S. Bagotzky, J. Electroanal. Chem. 509 (2001) 119.        [ Links ]

3. K. Bouzek, K.M. Mangold, K. Juttner, J. Appl. Electrochem. 31 (2001) 501.        [ Links ]

4. A.M. Castro Luna, J. Appl. Electrochem. 30 (2000) 1137.        [ Links ]

5. T. Kessler, A.M. Castro Luna, J. Appl. Electrochem. 32 (2002) 825.        [ Links ]

6. T. Kessler, A.M. Castro Luna, J. Solid State Electrochem. 7 (2003) 593.        [ Links ]

7. A. Anderson, E. Grantscharova, S. Seong, J. Electrochem. Soc. 143 (1996) 2075.        [ Links ]

8. E. Reddington, A. Sapienza, B. Gurrar, R. Viswanathan, S. Sarangapani, E.S. Smotkin, T.E. Mallouk, Science 280 (1998) 1735.        [ Links ]

9. D.R. Rolison, P.L. Hagans, K.S. Swider, J.W. Long, Langmuir 15 (1999) 774-779.        [ Links ]

10. V. Radmilovic, H.A. Gastgeiger, P.N. Ross Jr, J. Catalysis 154 (1995) 98.        [ Links ]

11. P. Waszczuk, G.Q. Lu, A. Wieckowski, C. Lu, C. Rice, R.I. Masel, Electrochim. Acta 47 (2002) 3637.        [ Links ]

12. W.H. Lizcano-Valbuena, V.A. Paganin, E.R. Gonzalez, Electrochim. Acta 47 (2002) 3715.        [ Links ]

13. H.A. Gasteiger, N. Markovic, P.N. Ross and E.J. Cairns, J. Electrochem. Soc. 141 (1994) 1795.        [ Links ]

14. M. Watanabe, Y. Genjima, K. Turumi, J. Electrochem. Soc. 144 (1997) 423.        [ Links ]

15. W. Chzanowski, A. Wieckowski, Langmuir 14 (1998) 1967.        [ Links ]

16. Y. Morimoto, E.B. Yeager, J. Electroanal. Chem. 444 (1998) 95.        [ Links ]

17. A.S. Aricó, P.L. Antonucci, E. Modica, V. Baglio, H. Kim, V. Antonucci, Electrochim. Acta 47 (2002) 3723.        [ Links ]

18. A.S. Aricó, V. Baglio, A. Di Blasi, E. Modica, P.L. Antonucci, V. Antonucci, J. Electroanal. Chem. 557 (2003) 167.        [ Links ]

19. H.A. Gasteiger, N. Markovic, P.N. Ross and E.J. Cairns, J. Phys. Chem. 97 (1993) 12020.         [ Links ]

20. J.F. Llopis, I.M. Tordesillas, in “Encyclopedia of Electrochemistry of the Elements”, A. Bard, Ed., Vol. VI, Marcel Dekker Inc., 1976, p. 277.        [ Links ]

21. D. Chu, S. Gilman, J. Electrochem. Soc. 143 (1996) 1685.        [ Links ]

22. S.Lj. Gojkovic, T.R. Vidakovic, D.R. Durovic, Electrochim. Acta 48 (2003) 3607.        [ Links ]

23. T.J. Schmidt, H.A. Gasteiger, R.J. Behm, Electrochem. Commun. 1 (1999) 1.        [ Links ]

24. A. Aramata,T. Kodera, M. Masuda, J. Appl. Electrochem. 18 (1988) 577.        [ Links ]

25. A.S. Aricó, E. Modica, E. Passalacqua, V. Antonucci, P.L. Antonucci, J. Appl. Electrochem. 27 (1997) 1275.        [ Links ]

26. C.E. Lee, S.H. Bergens, J. Phys. Chem. B 102 (1998)193.        [ Links ]

27. D.E. Stilwell, Su-Moon Park, J. Electrochem. Soc. 135 (1988) 2497.        [ Links ]

28.T. Iwasita, Electrochim. Acta 47 (2002) 3663.        [ Links ]

29. V.S. Bagotzski, T.B. Vassilyev, Electrochim. Acta 12 (1967) 1323.        [ Links ]

 

*Corresponding author. E-mail address: castrolu@inifta.unlp.edu.ar.

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License