Electrodeposition of ruthenium N-pyrrole bipyridine films on carbon felt electrodes and application as catalysts in alcohol electrooxidation

Claudemir Batalini; Wagner Ferraresi De Giovani

doi:10.22481/exon.v11i2.20579

Authors

Claudemir Batalini Universidade Federal de Mato Grosso
Wagner Ferraresi De Giovani Universidade de São Paulo

DOI:

https://doi.org/10.22481/exon.v11i2.20579

Keywords:

Modified electrodes, Electrooxidation, Polypyrrole films, Ruthenium

Abstract

Research aimed at the use of sustainable technologies based on Green Chemistry principles is expanding in academic and industrial circles. The catalytic electrooxidation of alcohols is a crucial element in research on energy generation. In order to explore a selective catalytic system in a less environmentally aggressive chemical process, ruthenium N-pyrrole bipyridine poly-cis- [Ru(L)2(OH2)2] 2+ films (L=4-methyl-4’-pyrrole-1-il-butyl-2,2’-bipyridine) were prepared on carbon felt electrodes, through the anodic electropolymerization of cis-[Ru(L)2Cl2] monomer and subsequent electrochemical induction to the aqua complex. These carbon felt electrodes modified by deposition of these films were used as electrocatalysts in alcohol oxidation reactions at a constant potential of +1.15 V (vs SCE), in an aqueous medium at pH 6.8 and 8.1. The alcohols and their oxidation products were benzyl alcohol (benzaldehyde), cyclohexanol (cyclohexanone), 1-phenylethanol (acetophenone) and p- methoxybenzyl alcohol (p-methoxybenzaldehyde). The reactions took place with total selectivity of the products and provided satisfactory yields.

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