The degree of hydration of the γ-Al2O3 surface governs (a) the type of interaction between phthalocyaninato cobalt(II), [Co(pc)], and γ-Al2O3; (b) the activation of [Co(pc)] towards O2 reduction; (c) the fixation of O2- to Al3+ centres. Thermal, spectroscopic and spectromagnetic analyses show that: (a) the complex [Co(pc)] interacts with the support, as expected for a basic molecule fixed to an acidic surface; (b) O 2 is reduced by the cobalt complex; (c) the initial stage of interaction between γ-Al2O3[Co(pc)] and O 2 is formation of the adduct [Co(pc)]O2 on the γ-Al2O3 surface, followed by O2- fixation on the Al3+ centres. Competition exists between [Co(pc)] and Al3+ as for O2- coordination.

Oxygen chemisorption by γ-Al2O3 phthalocyaninato cobalt(II) : Influence of the surface species γ-Al 2O3 on O2- fixation / G. Mercati, F. Morazzoni, M. Barzaghi, P. Carniti, V. Ragaini, F. Campanelli. - In: JOURNAL OF THE CHEMICAL SOCIETY. FARADAY TRANSACTIONS I. - ISSN 0300-9599. - 75:8(1979), pp. 1857-1867.

Oxygen chemisorption by γ-Al2O3 phthalocyaninato cobalt(II) : Influence of the surface species γ-Al 2O3 on O2- fixation

P. Carniti;V. Ragaini;
1979

Abstract

The degree of hydration of the γ-Al2O3 surface governs (a) the type of interaction between phthalocyaninato cobalt(II), [Co(pc)], and γ-Al2O3; (b) the activation of [Co(pc)] towards O2 reduction; (c) the fixation of O2- to Al3+ centres. Thermal, spectroscopic and spectromagnetic analyses show that: (a) the complex [Co(pc)] interacts with the support, as expected for a basic molecule fixed to an acidic surface; (b) O 2 is reduced by the cobalt complex; (c) the initial stage of interaction between γ-Al2O3[Co(pc)] and O 2 is formation of the adduct [Co(pc)]O2 on the γ-Al2O3 surface, followed by O2- fixation on the Al3+ centres. Competition exists between [Co(pc)] and Al3+ as for O2- coordination.
Settore CHIM/02 - Chimica Fisica
JOURNAL OF THE CHEMICAL SOCIETY. FARADAY TRANSACTIONS I
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/197162
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