Articulo
Electrochemical Faceting of polycrystalline platinum in HF solutions
Registro en:
issn:0013-4686
Autor
Custidiano, Ernesto Ramon
Kessler, Teresita
Triaca, Walter Enrique
Arvia, Alejandro Jorge
Institución
Resumen
The electrochemical faceting of polycrystalline (pc) platinum yielding a (100)-preferred oriented electrode surface was accomplished in HF solutions by applying to the pc platinum electrode a square wave potential perturbation at 1 kHz in the 0.2 to 1.3 V range (vs rhe). SEM patterns of the resulting surfaces were also obtained. For HF concentrations up to 2 M no appreciable influence of the electrolyte concentration on the electrochemical faceting was noticed. Otherwise, the voltammetric response of the (100)-type preferred oriented platinum surface in the H-adatom potential range when compared to previously reported data resulted remarkably sensitive to the electrolyte composition. The discussion of results was based on the non-equilibrium adsorption conditions for anions under the periodic perturbation. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas