Articulo
Scanning tunneling microscopy of amorphous alloy electrocatalysts for water electrolysis
Autor
Kreysa, G.
Gómez, J.
Baró, A.
Arvia, Alejandro Jorge
Institución
Resumen
The surface topography of amorphous metals useful as electrocatalysts in water electrolysis, denoted as G16 (Cos<sub>50</sub>Ni<sub>25</sub>Si<sub>15</sub>Bu<sub>10</sub>) and G14 (Fe<sub>60</sub>Co<sub>20</sub>Si<sub>10</sub>B<sub>10</sub>), are studied at the gm scale with a conventional SEM, and at the nm scale with the STM. Both untreated specimens as well as those employed as electrodes for a relatively prolonged time exhibit the same microstructure with amorphous and crystalline surface regions. The microcrystallite reduced size structure, probably involving a very compact structure, appears to be of the greatest importance concerning the electrocatalytic activity of these materials. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas