CO2 Electroreduction on Cu-Modified Platinum Single Crystal Electrodes in Aprotic Media

Rudnev, Alexander; Ehrenburg, Maria R.; Molodkina, Elena B.; Botriakova, Inna G.; Danilov, Alexey I.; Wandlowski, Thomas (2014). CO2 Electroreduction on Cu-Modified Platinum Single Crystal Electrodes in Aprotic Media. Electrocatalysis, 6(1), pp. 42-50. Springer 10.1007/s12678-014-0217-y

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Techniques of electrode modification by copper deposits are developed that allow obtaining compact bulk quasi-epitaxial deposits on basal Pt(hkl) single crystal faces. The issues of the deposit roughness and characterization are discussed. Problems of drying and transferring electrodes with copper deposits into other solutions are considered. The obtained deposits are used for CO2 electroreduction in propylene carbonate and acetonitrile solutions of 0.1 M TBAPF6, and the relationship between the electrode surface structure and its electrocatalytic activity in CO2 electroreduction is discussed. We also demonstrate that the restructuring of Cu deposits occurs upon CO2 electroreduction. Complementary reactivity studies are presented for bare Pt(hkl) and Cu(hkl) single crystal electrodes. Cu-modified Pt(hkl) electrodes display the highest activity as compared to bare Pt(hkl) and Cu(hkl). Particularly, the Cu/Pt(110) electrode shows the highest activity among the electrodes under study. Such high activity of Cu/Pt(hkl) electrodes can be explained not only by the increasing actual surface area but also by structural effects, namely by the presence of a large amount of specific defect sites (steps, kinks) on Cu crystallites.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Rudnev, Alexander and Wandlowski, Thomas

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry
500 Science

ISSN:

1868-2529

Publisher:

Springer

Language:

English

Submitter:

Beatrice Niederhauser

Date Deposited:

26 Mar 2015 10:26

Last Modified:

25 Aug 2015 10:26

Publisher DOI:

10.1007/s12678-014-0217-y

URI:

https://boris.unibe.ch/id/eprint/65943

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