Abstract
The hydrogen evolution reaction (h.e.r.) at a 10 wt % palladium-dispersed carbon (Pd/C) electrode in 0.1 m NaOH solution has been investigated with reference to that on carbon (Vulcan XC-72) and palladium foil electrodes by analysing the a.c.-impedance spectra combined with cyclic voltammograms. From the coincidence of the maximum charge transfer resistances and the minimum hydrogen evolution resistances for the h.e.r. at the respective electrode potential for the Pd/C, carbon and Pd foil electrodes, it is suggested that the h.e.r. at the Pd/C electrode takes place along with the absorption and diffusion of hydrogen above −1.10 V vs SCE, whereas the former dominates over the latter below −1.10V vs SCE. In the case of the Pd foil electrode the transition of absorption and diffusion to evolution occurs at −0.96V vs SCE. In contrast to the Pd/C and Pd foil electrodes the h.e.r. occurs strongly at the carbon electrode below −1.20V vs SCE. The hydrogen evolution overpotential on the Pd/C electrode is decreased by 0.10 V in comparison to the carbon electrode due to the larger electrochemical active area of the finely dispersed Pd particles.
Similar content being viewed by others
References
J. O'M. Bockris and A. K. N. Reddy, ‘Modern Electrochemistry’, Vol. 2, Plenum, New York (1970) pp. 114–151.
L. Bai, D. A. Harrington and B. E. Conway, Electrochem. Acta 32 (1987) 1713.
M. Enyo, in ‘Comprehensive Treatise of Electrochemistry’, Vol. 7 (edited by J. O'M. Bockris, E. Yeager, S. V. M. Khan and R. E. White), Plenum Press, New York, (1988) p. 241.
E. Endoh, H. Otouma, T. Morimoto and Y. Oda, Int. J. Hydrogen Energy 12 (1987) 473.
J. Fournier, P. W. Wrona, A. Lasia, R. Lacasse, J.-M. Lanacette, H. Menard and L. Brossard, J. Electrochem. Soc. 139 (1992) 2372.
V. Breger and E. Gileadi, Electrochim. Acta 16 (1971) 177.
C. Lim and S.-I. Pyun, ibid. 39 (1994) 363.
T. H. Yang and S.-I. Pyun, Electrochim. Acta (1996) in press.
N. Tateishi, K. Yahikozawa, K. Nishimura, M. Suzuki, Y. Iwanaga, M. Watanabe, E. Eunami, Y. Matsuda and Y. Takasu, ibid. 36 (1991) 1235.
J.-D. Kim, S.-I. Pyun, T.-H. Yang and J.-B. Ju, J. Electroanal. Chem. 383 (1995) 161.
F. G. Will and C. A. Knorr, Z. Elektrochem. 64 (1960) 258.
J. R. Macdonald, ‘Impedance Spectroscopy’, J. Wiley & Sons, New York (1987) p. 16.
J.-S. Bae and S.-I. Pyun, J. Mat. Sci. Lett. 13 (1994) 573.
J. O'M. Bockris and A. K. N. Reddy, ‘Modern Electrochemistry’, Vol. 2, Plenum, New York (1970) pp. 741–61.
J. Vracar and B. E. Conway, J. Electroanal. Chem. 277 (1990) 253.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Pyun, S.I., Yang, T.H. & Kim, C.S. Investigation of the hydrogen evolution reaction at a 10 wt% palladium-dispersed carbon electrode using electrochemical impedance spectroscopy. J Appl Electrochem 26, 953–958 (1996). https://doi.org/10.1007/BF00242048
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00242048