Articulo
Scanning tunneling microscopy of electrochemically activated platinum surfaces : A direct ex-situ determination of the electrode nanotopography
Registro en:
issn:0002-7863
issn:1520-5126
Autor
Vázquez, L.
Gómez, J.
Baro, A. M.
García, N.
Marcos, M. L.
González Velasco, J.
Vara, J. M.
Arvia, Alejandro Jorge
Presa, J.
García, A.
Aguilar, M.
Institución
Resumen
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. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas