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pH and Anion Effects on Cu-Phosphate Interfaces for CO Electroreduction

preprint
submitted on 31.07.2020 and posted on 31.07.2020 by Paula Sebastián Pascual, Amanda Schramm Petersen, Alexander Bagger, Jan Rossmeisl, María Escudero-Escribano
Herein, we have investigated the interfacial properties of Cu(111) and Cu(100) in phosphate buffer solutions at different pH conditions and in presence of CO. Ab initio molecular simulations of the Cu-electrolyte interface were combined with voltammetric experiments carried out on Cu(100) and Cu(111) single-crystalline electrodes. We show that the adsorption strength of phosphate species on the different Cu facets affects the potential range at which CO poisons the surface. The properties of the Cu-electrolyte interface controls the potential range for CO reduction on Cu.

History

Email Address of Submitting Author

paula.pascual@chem.ku.dk

Institution

University of Copenhagen

Country

Denmark

ORCID For Submitting Author

0000-0001-7985-0750

Declaration of Conflict of Interest

The authors declare no competing interests

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