INVESTIGADORES
QUAINO Paola Monica
artículos
Título:
Why is Gold such a Good Catalyst for Oxygen Reduction in Alkaline Media?
Autor/es:
PAOLA QUAINO; NOELIA LUQUE; RENAT NAZMUTDINOV; ELISABETH SANTOS; WOLFGANG SCHMICKLER
Revista:
Angewandte Chemie
Editorial:
WILEY-V C H VERLAG GMBH
Referencias:
Lugar: Weinheim; Año: 2012 vol. 51 p. 12997 - 13000
ISSN:
1433-7851
Resumen:
The two faces of gold: The reduction of oxygen on gold electrodes in alkaline solutions has been investigated theoretically. The most favorable reaction leads directly to adsorbed O2- , but the activation energy for a two-step pathway, in which the first step is an outersphere electron transfer to give solvated O2-, is only slightly higher. d-band catalysis, which dominates oxygen reduction in acid media, plays no role. The reason why the reaction is slow in acid media is also explained.
