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Type: Artigo de periódico
Title: Electrocatalytic oxidation of methanol by the [Ru3O(OAc)6(py)2(CH3OH)]3+cluster: improving the metal-ligand electron transfer by accessing the higher oxidation states of a multicentered system
Author: TOMA, Henrique E.
ARAKI, Koiti
FORMIGA, André Luiz Barboza
ALEXIOU, Anamaria D. P.
NUNES, Genebaldo S.
Abstract: The [Ru3O(Ac)6(py)2(CH3OH)]+ cluster provides an effective electrocatalytic species for the oxidation of methanol under mild conditions. This complex exhibits characteristic electrochemical waves at -1.02, 0.15 and 1.18 V, associated with the Ru3III,II,II/Ru3III,III,II/Ru 3III,III,III /Ru3IV,III,III successive redox couples, respectively. Above 1.7 V, formation of two RuIV centers enhances the 2-electron oxidation of the methanol ligand yielding formaldehyde, in agreement with the theoretical evolution of the HOMO levels as a function of the oxidation states. This work illustrates an important strategy to improve the efficiency of the oxidation catalysis, by using a multicentered redox catalyst and accessing its multiple higher oxidation states.
Subject: Ruthenium-acetate clusters
Methanol oxidation
Country: Brasil
Editor: Sociedade Brasileira de Química
Citation: Química Nova, v.33, n.10, p.2046-2050, 2010
Rights: aberto
Identifier DOI: 10.1590/S0100-40422010001000008
Date Issue: 2010
Appears in Collections:IQ - Artigos e Outros Documentos

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