INIFTA 05425
INSTITUTO DE INVESTIGACIONES FISICO-QUIMICAS TEORICAS Y APLICADAS
Unidad Ejecutora - UE
artículos
Título:
Catalytic effects produced by cathodisation of platinum electrodes in sulphuric solutions. Int J Hydrogen Energy (February 2008), doi:10.1016/j.ijhydene.2007.12.045
Autor/es:
V DÍAZ; JO ZERBINO; M E MARTINS; MG SUSTERCIC; CF ZINOLA
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
ELSEVIER
Referencias:
Lugar: Inglaterra ; Año: 2008 vol. 33 p. 3502 - 3505
ISSN:
0360-3199
Resumen:
The effect of strong cathodisation of platinum electrodes in 0.5M H2SO4 aqueous solutions is investigated using electrochemical and surface analysis techniques. This pretreatment activates the electrode for methanol electrocatalytic oxidation, with an approximate threefold increase in the anodic currents measured in the potential region between 0.6 and 0.75V (versus RHE). After long cathodisation, heterogeneous sulphur deposits localized near shavings or kinks, which promote the formation and detachment of hydrogen bubbles, are detected on the platinum electrode.
