Co3O4 layers on an Ni support were prepared by the sol-gel method. Their properties were characterized by TGA, XRD and SEM. For comparison, Co3O4 was also prepared by thermal decomposition of Co nitrate. The surface electrochemical response was studied in alkaline solution by cyclic voltammetry at several potential scan rates. The electrochemical analysis included the open circuit potential, the voltammetric peak potentials, and the voltammetric charge. Extrapolation of the charge to scan rates v = 0 and v = ∞ allowed the 'electrochemical porosity' to be estimated. The results suggest that Co3O4 from the sol-gel method is less crystalline and more porous, although the highest difference in terms of surface charge with respect to the oxide from the nitrate is only a factor of 2. © Elsevier Science S.A.

Surface characterization of Co3O4 electrodes prepared by the sol-gel method / G. Spinolo, S. Ardizzone, S. Trasatti. - In: JOURNAL OF ELECTROANALYTICAL CHEMISTRY. - ISSN 1572-6657. - 423:1-2(1997), pp. 49-57.

Surface characterization of Co3O4 electrodes prepared by the sol-gel method

S. Ardizzone;
1997

Abstract

Co3O4 layers on an Ni support were prepared by the sol-gel method. Their properties were characterized by TGA, XRD and SEM. For comparison, Co3O4 was also prepared by thermal decomposition of Co nitrate. The surface electrochemical response was studied in alkaline solution by cyclic voltammetry at several potential scan rates. The electrochemical analysis included the open circuit potential, the voltammetric peak potentials, and the voltammetric charge. Extrapolation of the charge to scan rates v = 0 and v = ∞ allowed the 'electrochemical porosity' to be estimated. The results suggest that Co3O4 from the sol-gel method is less crystalline and more porous, although the highest difference in terms of surface charge with respect to the oxide from the nitrate is only a factor of 2. © Elsevier Science S.A.
Cobalt compounds ; Cyclic voltammetry ; Electrochemistry ; Nickel ; Porosity ; Pyrolysis ; Scanning electron microscopy ; Sol-gels ; Surface properties ; Thermogravimetric analysis ; X ray diffraction analysis, Surface electrochemical response, Electrochemical electrodes
Settore CHIM/02 - Chimica Fisica
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/182524
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 119
  • ???jsp.display-item.citation.isi??? 123
social impact