| dc.creator | Kessler, Teresita | |
| dc.creator | Triaca, Walter Enrique | |
| dc.creator | Arvia, Alejandro Jorge | |
| dc.date | 1994 | |
| dc.date | 2022-06-14T17:13:50Z | |
| dc.date.accessioned | 2023-07-15T04:44:56Z | |
| dc.date.available | 2023-07-15T04:44:56Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/137887 | |
| dc.identifier | issn:0021-891x | |
| dc.identifier | issn:1572-8838 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7470735 | |
| dc.description | Oxygen evolution reaction (o.e.r.) kinetics in NaOH solutions have been studied on both fresh and oxide covered Co50Ni25Si15B10 amorphous alloy (G-16) electrodes. Steady state polarization curves obtained in different aqueous xM NaOH (0.1 ⩽ x ⩽ 4) in the 30–80°C range fulfill Tafel relationships at low overpotentials; the Tafel slope is close to 2.3(RT/F) V dec−1 for both G-16 and oxide coated G-16 electrodes. At high overpotentials, ohmic relationships with slopes becoming increasingly steep, regardless of the NaOH concentration, are observed. In the Tafel region, the reaction order with respect to OH− is near 2. The apparent current density at constant potential, for oxide coated G-16 electrodes, is greater than that for uncoated G-16. The high catalytic activity of the oxide coated G-16 for the o.e.r. is attributed to its spinel-type structure. The kinetics of the o.e.r. at low overpotentials is explained through a mechanism involving a first electron transfer step followed by a rate-determining chemical step. | |
| dc.description | Facultad de Ingeniería | |
| dc.description | Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas | |
| dc.format | application/pdf | |
| dc.format | 310-315 | |
| 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 | Física | |
| dc.subject | Oxygen evolution reaction | |
| dc.subject | Tafel relationships | |
| dc.subject | Oxide coated G-16 electrodes | |
| dc.title | Kinetics and mechanism of the oxygen evolution reaction at oxide-coated Co-Ni amorphous alloy electrodes | |
| dc.type | Articulo | |
| dc.type | Articulo | |
