Electrocatalytic reduction of bromothiophenes on gold and silver electrodes: An example of synergy in electrocatalysis
Articolo
Data di Pubblicazione:
2014
Citazione:
Electrocatalytic reduction of bromothiophenes on gold and silver electrodes: An example of synergy in electrocatalysis / S. Arnaboldi, A. Bonetti, E. Giussani, P.R. Mussini, T. Benincori, S. Rizzo, A.A. Isse, A. Gennaro. - In: ELECTROCHEMISTRY COMMUNICATIONS. - ISSN 1388-2481. - 38(2014), pp. 100-103.
Abstract:
The electroreduction of bromothiophenes on Au and Ag provides a striking model of synergy in electrocatalysis,
when a second group specifically interacting with the catalytic surface is present besides the reacting one, providing
an auxiliary anchoring effect. The high catalytic activity of Ag for bromobenzene reduction is enhanced in the
bromothiophene case.Moreover, Au, having for bromobenzene a much lower and less reproducible catalytic effect
than Ag on account of the repulsive effect of its very negative surface charge in the working potential range,
approaches Ag activity in the case of 2-bromothiophene, where the anchoring S group is adjacent to the Br group
to be cleaved. The beneficial anchoring effect is lower when it has to be shared between two Br leaving groups
adjacent to the S group, and becomes negligible in the case of a bromide leaving group in 3-position.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Anchoring groups; Bromothiophenes; Dissociative electron transfer; Gold electrodes; Molecular electrocatalysis; Silver electrodes
Elenco autori:
S. Arnaboldi, A. Bonetti, E. Giussani, P.R. Mussini, T. Benincori, S. Rizzo, A.A. Isse, A. Gennaro
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