Abstract
The kinetics of the hydrogen oxidation and the CO adsorption on a Pt (ultra)microelectrode is studied in a 0.5 M H2SO4 solution saturated with a mixture of gaseous H2 and CO at partial CO pressures p CO = 10–500 ppm. The balance between rates of diffusion and adsorption of CO at different adsorption times is studied. Studied is the effect of CO impurities in H2 on steady-state polarization curves for the hydrogen ionization and nonsteady-state curves of the oxidation current decay with time at 0.02–0.05 V. Conditions under which in a certain time interval and at a certain CO concentration the slope of an I vs. t curve is proportional to p CO are determined. The obtained dependence may be used when designing a technique for monitoring CO impurities in technical hydrogen.
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REFERENCES
Stetter, J.R., Penrose, W.R., and Yao, S., J. Electrochem. Soc., 2003, vol. 150, p. S11.
Tseng, K.-I. and Yang, M.-C., J. Electrochem. Soc., 2003, vol. 150, p. 156.
Costamagna, P. and Srinivasan, S., J. Power Sources, 2001, vol. 102, pp. 242, 253.
Oetjen, H.-F., Schmidt, V.M., Stimming, U., and Trila, F., J. Electrochem. Soc., 1996, vol. 143, p. 3838.
Watanabe, M., Uchida, M., and Motoo, S., J. Electroanal. Chem., 1987, vol. 229, p. 395.
Schmidt, V.M., Bröckerhoff, P., Höhlein, B., Menzer, R., and Stimming, U., J. Power Sources, 1994, vol. 49, p. 299.
Schmidt, T.J., Gasteiger, H.A., and Behm, R.J., J. Electrochem. Soc., 1999, vol. 146, p. 1296.
Camara, G.A., Ticianelli, E.A., Mukerjee, S., Lee, S.J., and McBreen, J., J. Electrochem. Soc., 2002, vol. 149, p. 748.
Wilson, M.S. and Gottesfeld, S., J. Appl. Electrochem, 1992, vol. 22, p. 1.
Divisek, J., Oetjen, H.F., Peinecke, V., Schmidt, V.M., and Stimming, U., Electrochim. Acta, 1998, vol. 43, p. 3811.
Igarashi, H., Fujino, T., and Watanabe, M., J. Electroanal. Chem., 1995, vol. 391, p. 119.
Schmidt, T.J., Gasteiger, H.A., Stab, G.D., Urban, P.M., Kolb, D.M., and Behm, R.J., J. Electrochem. Soc., 1998, vol. 145, p. 2354.
Conway, B.E. and Tilak, B.V., Electrochim. Acta, 2002, vol. 47, p. 3571.
Microelectrodes: Theory and Applications, Montenegro, M.J., Queiros, A.M., and Daschbach, J.L., Eds., Dordrecht: Kluwer Academic, 1991, p. 3.
Rotenberg, Z.A. and Damaskin, B.B., Elektrokhimiya, 2004, vol. 40, p. 61.
Osetrova, N.V. and Bagotskii, V.S., Elektrokhimiya, 1971, vol. 7, p. 1717.
Bagotzky, V.S. and Osetrova, N.V., J. Electroanal. Chem., 1973, vol. 43, p. 233.
Gilman, S., J. Phys. Chem., 1963, vol. 67, p. 1898.
Bagotzky, V.S. and Vassilyev, Yu.B., Electrochim. Acta, 1967, vol. 12, p. 1323.
Khazova, O.A., Vassiliev, Yu.B., and Bagotzky, V.S., Elektrokhimiya, 1976, vol. 12, p. 464.
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Maiorova, N.A., Khazova, O.A. & Tarasevich, M.R. Hydrogen Oxidation on a Platinum Microelectrode: Effect of Carbon Monoxide Impurities. Russian Journal of Electrochemistry 40, 1060–1065 (2004). https://doi.org/10.1023/B:RUEL.0000046491.89649.1d
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DOI: https://doi.org/10.1023/B:RUEL.0000046491.89649.1d