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Type: Artigo
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: Eletrocatálise
Country: Brasil
Editor: Sociedade Brasileira de Química
Rights: Aberto
Identifier DOI: 10.1590/S0100-40422010001000008
Date Issue: 2010
Appears in Collections:IQ - Artigos e Outros Documentos

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