Artículo
Spin effects in oxygen electrocatalysis: a discussion
Fecha de publicación:
04/2013
Editorial:
Elsevier Science
Revista:
Electrochemistry Communications
ISSN:
1388-2481
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The reduction of molecular oxygen in triplet and singlet spin states at metal electrodes is analyzed in the framework of quantum mechanical theory of charge transfer. Both outer- and inner-sphere mechanism is considered. Singlet oxygen is argued to be considerably more active in electron transfer processes. It is demonstrated that spin polarization may play a catalytic role, parallel with the effect of overlap of reactant orbitals with the d-band of a metal electrode. Our model is based on two main assumptions: (i) some metal surfaces favor the existence of singlet molecular oxygen in adsorbed state; and (ii) short-living singlet O2 molecules may appear as intermediates at some reduction steps. These two reasons are expected to increase the local concentration of active singlet molecular oxygen in reaction layer.
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Articulos(IFEG)
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Citación
Nazmutdinov, Renat R.; Santos, Elizabeth del Carmen; Schmickler, Wolfgang; Spin effects in oxygen electrocatalysis: a discussion; Elsevier Science; Electrochemistry Communications; 33; 4-2013; 14-17
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