A direct scanning tunneling microscopy ex-situ determination on the nanometer scale of the topography of electrochemically highly activated platinum electrodes is presented. A correlation between catalytic activity and surface microtopography becomes evident. This result gives support to a structural model for the activated electrode surface. In the model, a volume with a pebble-like structure allows electrocatalytic processes to occur practically free of diffusion relaxation contributions under usual voltammetric conditions.
Información general
Fecha de publicación:1987
Idioma del documento:Inglés
Revista:Journal of the American Chemical Society; vol. 109, no. 6
Institución de origen:Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas