University of Limerick Institutional Repository

Mimicking the microbial oxidation of elemental sulfur with a biphasic electrochemical cell

DSpace Repository

Show simple item record Suárez-Herrera, Marco F. Gamero-Quijano, Alonso Solla-Gullón, José Scanlon, Micheál D. 2021-11-12T09:26:15Z 2021-11-12T09:26:15Z 2022
dc.description peer-reviewed en_US
dc.description.abstract The lack of an artificial system that mimics elemental sulfur (S8) oxidation by microorganisms inhibits a deep mechanistic understanding of the sulfur cycle in the biosphere and the metabolism of sulfuroxidising microorganisms. In this article, we present a biphasic system that mimics biochemical sulfur oxidation under ambient conditions using a liquid|liquid (L|L) electrochemical cell and gold nanoparticles (AuNPs) as an interfacial catalyst. The interface between two solvents of very different polarity is an ideal environment to oxidise S8, overcoming the incompatible solubilities of the hydrophobic reactants (O2 and S8) and hydrophilic products (H+, SO3 2–, SO4 2–, etc.). Furthermore, the interfacial AuNPs provide a catalytic surface onto which O2 and S8 can adsorb. Control over the driving force for the reaction is provided by polarising the L|L interface externally and tuning the Fermi level of the interfacial AuNPs by the adsorption of aqueous anions. Comparison of electrochemical measurements using a 4-electrode closed bipolar electrochemical cell and a L|L electrochemical cell confirmed that electron transfer reactions are possible between O2, gold and S8 in biphasic systems. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation 4.562 en_US
dc.relation.ispartofseries Electrochimica Acta;401, 139443
dc.subject Sulfur oxidation en_US
dc.subject Polarised liquid en_US
dc.subject Interfacial assembly en_US
dc.title Mimicking the microbial oxidation of elemental sulfur with a biphasic electrochemical cell en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.electacta.2021.139443
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor IRC en_US
dc.contributor.sponsor European Union (EU) en_US
dc.contributor.sponsor Fundación Banco de la República en_US
dc.relation.projectid 13/SIRG/2137 en_US
dc.relation.projectid GOIPD/2018/252 en_US
dc.relation.projectid 716792 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 3025411

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search ULIR


My Account