Surface Nanostructuring of Copper Using Fluoride and Chloride
Pascual-Llorens, Vicente (University of Copenhagen)
Serrà, Albert (Universitat de Barcelona. Institute of Nanoscience and Nanotechnology)
Mazaira, Pedro (University of Copenhagen)
Escudero-Escribano, María (Institut Català de Nanociència i Nanotecnologia)
Sebastián-Pascual, Paula (University of Copenhagen)

Fecha:	2024
Resumen:	Copper is an active electrocatalyst for various energy conversion reactions, but its performance depends on the structure of the active surface sites. In this work, we propose a simple strategy to tailor both the roughness and the active site's geometry of copper. To modify the surface of copper, we oxidize and reduce a copper polycrystalline electrode in 0. 1 M solutions containing both sodium fluoride and sodium chloride with different chloride/fluoride molar ratios: (0. 1-x) M NaF+x M NaCl. To address the anion effect on the changes in surface geometry, we recorded the voltammetric fingerprints of the modified electrodes using lead underpotential deposition (UPD). The voltammetric analysis suggested that while chloride induces (n10) sites, fluoride promotes an increase in the active surface area and the growth of low-coordinated sites with (110) or (111) geometry. Solutions containing both fluoride and chloride anions induced (n10) motifs covered by nanometric clusters, as observed by scanning electron microscopy, forming a highly defect-rich surface. Our work provides a direct link between electrochemical response and ex-situ structural characterization, and compares, in detail, the effect of chloride and fluoride on the surface nanostructuring of copper.
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Publicado en:	ChemElectroChem, Vol. 11, Issue 20 (September 2024) , art. e202400414, ISSN 2196-0216

DOI: 10.1002/celc.202400414

13 p, 2.8 MB

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Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Institut Català de Nanociència i Nanotecnologia (ICN2)
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