info:eu-repo/semantics/article
A scenario for oxygen reduction in alkaline media
Fecha
2016-08Registro en:
Ignaczak, Anna; Nazmutdinov, Renat; Goduljan, Aleksej; Moreira de Campos Pinto, Leandro; Juarez, Maria Fernanda; et al.; A scenario for oxygen reduction in alkaline media; Elsevier Ltd; Nano Energy; 26; 8-2016; 558-564
2211-2855
CONICET Digital
CONICET
Autor
Ignaczak, Anna
Nazmutdinov, Renat
Goduljan, Aleksej
Moreira de Campos Pinto, Leandro
Juarez, Maria Fernanda
Quaino, Paola Monica
Santos, Elizabeth del Carmen
Schmickler, Wolfgang
Resumen
We investigate oxygen reduction in alkaline solution with the focus on gold and silver electrodes. On the basis of theoretical considerations we propose a detailed mechanism, which we support by explicit calculations. In accordance with previous suggestions we conclude that the first step is an outer-sphere electron transfer to the oxygen molecule. The breaking of he oxygen-oxygen bond involves adsorption of OH on the electrode surface. This is much stronger on Au(100) than on Au(111), which explains why the former is a better catalyst.