| dc.creator | Alonso, C. | |
| dc.creator | Salvarezza, Roberto Carlos | |
| dc.creator | Vara, J. M. | |
| dc.creator | Arvia, Alejandro Jorge | |
| dc.date | 1990 | |
| dc.date | 2019-08-28T12:04:09Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/79960 | |
| dc.identifier | issn:0013-4686 | |
| dc.description | The surface diffusion coefficient (D<sub>s</sub>) of Au atoms in 0.5 M H<sub>2</sub>SO<sub>4</sub> at 298 K has been determined from the time dependence of the surface roughness factor of electrodispersed Au electrodes in 0.5 M H<sub>2</sub>SO<sub>4</sub>. The value of D<sub>s</sub> for 0.5 M H<sub>2</sub>SO<sub>4</sub> is 5 × 10<sup>−14</sup> cm<sup>2</sup> s<sup>−1</sup>, a figure which depends considerably on the presence of adsorbable species in solution. Thus, the adsorption of pyridine produces a remarkable decrease of D<sub>s</sub>, whereas the adsorption of Cl<sup>−</sup> ion results in the opposite effect. The corresponding values of D<sub>s</sub> are 1.2 × 10<sup>−14</sup> cm<sup>2</sup> s<sup>−1</sup> for 0.5 M H<sub>2</sub>SO<sub>4</sub> + 0.1 M pyridine, and 2.5 × 10<sup>−13</sup> cm<sup>2</sup> s<sup>−1</sup> for 0.5 M H<sub>2</sub>SO<sub>4</sub> + 5 × 10<sup>−4</sup> M KCl. These results are interpreted through the influence of the adsorbate on the Au surface atom diffusion mechanism. | |
| dc.description | Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) | |
| dc.description | Facultad de Ciencias Exactas | |
| dc.format | application/pdf | |
| dc.format | 1331-1336 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Ciencias Exactas | |
| dc.subject | Química | |
| dc.subject | surface diffusion | |
| dc.subject | Adsorción | |
| dc.subject | adsorbate | |
| dc.subject | electrodispersed electrodes | |
| dc.subject | Electrodos | |
| dc.subject | Oro | |
| dc.title | The surface diffusion of gold atoms on gold electrodes in acid solution and its dependence on the presence of foreign adsorbates | |
| dc.type | Articulo | |
| dc.type | Articulo | |
