INVESTIGADORES
CALVO Ernesto Julio
artículos
Título:
Adsorption of 4,4′-Dithiodipyridine Axially Coordinated to Iron(II) Phthalocyanine on Au(111) as a New Strategy for Oxygen Reduction Electrocatalysis
Autor/es:
HERRERA, SANTIAGO; TASCA, FEDERICO; WILLIAMS, FEDERICO J.; CALVO, ERNESTO J.
Revista:
Chemphyschem
Editorial:
WILEY-V C H VERLAG GMBH
Referencias:
Año: 2018
ISSN:
1439-4235
Resumen:
4,4´-Dithiodipyridine was coordinated by the N atom to Iron(II) phthal-cyanine(FePc) and then adsorbed from a benzene solution onto a Au(111) single crystal electrode with cleavage of the S-S bond and formation of Au-S bond. The coordination of PySSPy to FePc was monitored by UV-Visible spectroscopy while the adsobed FePc anchored by PyS-Au(111) was examined by in situ STM in 0.1 M HClO4 and by X-ray photoelectron spectroscopy (XPS). Rotating disc electrode (RDE) and linear sweep voltammetry (LSV) of the resulting FePc modified Au(111) electrode in oxygen saturated 0.1 M NaOH electrolyte exhibits excellent electro-catalysis for the oxygen reduction reaction (ORR) with a smaller overpotentialthan Au(111) with FePc deposited by direct adsorption from a benzene solution.
