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- Title
Proton switch for modulating oxygen reduction by a copper electrocatalyst embedded in a hybrid bilayer membrane.
- Authors
Barile, Christopher J.; Tse, Edmund C. M.; Li, Ying; Sobyra, Thomas B.; Zimmerman, Steven C.; Hosseini, Ali; Gewirth, Andrew A.
- Abstract
Molecular switches gate many fundamental processes in natural and artificial systems. Here, we report the development of an electrochemical platform in which a proton carrier switches the activity of a catalyst. By incorporating an alkyl phosphate in the lipid layer of a hybrid bilayer membrane, we regulate proton transport to a Cu-based molecular oxygen reduction reaction catalyst. To construct this hybrid bilayer membrane system, we prepare an example of a synthetic Cu oxygen reduction reaction catalyst that forms a self-assembled monolayer on Au surfaces. We then embed this Cu catalyst inside a hybrid bilayer membrane by depositing a monolayer of lipid on the self-assembled monolayer. We envisage that this electrochemical system can give a unique mechanistic insight not only into the oxygen reduction reaction, but into proton-coupled electron transfer in general.
- Subjects
OXYGEN reduction; ELECTROCATALYSTS; COPPER; MOLECULAR switches; ALKYL phosphates; CHARGE exchange
- Publication
Nature Materials, 2014, Vol 13, Issue 6, p619
- ISSN
1476-1122
- Publication type
Article
- DOI
10.1038/nmat3974