Cu(111) single crystal electrodes: Modifying interfacial properties to tailor electrocatalysis

Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10045/118166
Información del item - Informació de l'item - Item information
Título: Cu(111) single crystal electrodes: Modifying interfacial properties to tailor electrocatalysis
Autor/es: Auer, Andrea | Sarabia, Francisco J. | Griesser, Christoph | Climent, Victor | Feliu, Juan M. | Kunze-Liebhäuser, Julia
Grupo/s de investigación o GITE: Electroquímica de Superficies
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Palabras clave: Cu single crystals | Adatom modification | Irreversible adsorption | In situ electrochemical scanning tunneling microscopy | Potential of maximum entropy | Laser induced temperature jump | Electrocatalysis
Área/s de conocimiento: Química Física
Fecha de publicación: 10-nov-2021
Editor: Elsevier
Cita bibliográfica: Electrochimica Acta. 2021, 396: 139222. https://doi.org/10.1016/j.electacta.2021.139222
Resumen: Tailoring electrocatalyst materials to the specific requirements of a certain reaction and to optimize activity or enhance selectivity is a key tactic for the development of low-temperature fuel and electrolyzer cells for clean energy production. Here, we demonstrate the modification of Cu(111) electrodes with different sub-monolayer coverages of foreign metals (Cd) and metal hydroxides (Co(OH)2 and Ni(OH)2) for application in the hydrogen evolution reaction (HER) in alkaline media. In situ electrochemical scanning tunneling microscopy (EC-STM) reveals that these modifications have a significant influence on the morphology and structure of the Cu(111) surface with its characteristics depending on both the nature and the amount of the adsorbed metal(hydroxide). Ni(OH)2 and Co(OH)2 on Cu(111) lead to a significant enhancement of the electrocatalytic activity towards the HER in alkaline electrolyte, whereas a decrease in activity is found for Cd modified Cu(111). These trends can be rationalized by considering the strength of the interfacial electric field and its influence on the specific interactions of the electrode with the water ad-layer close to the surface, as determined by laser-induced temperature jump measurements. This comparative study therefore provides valuable information on the structure-activity relation as well as insights on the interfacial characteristics of different bimetallic Cu electrocatalysts.
Patrocinador/es: A.A. is a recipient of a doctorate (DOC) Fellowship of the Austrian Academy of Sciences at the Institute of Physical Chemistry. C.G. thanks the Austrian Research Promotion Agency (FFG) for funding by the project number 870523. J.K-L. acknowledges funding by the Austrian Science Fund (FWF) via grant I-4114-N37. J.M.F and V.C. acknowledge financial support from Ministerio de Ciencia e Innovación (project PID2019-105653GB-100) and Generalitat Valenciana (project PROMETEO/2020/063).
URI: http://hdl.handle.net/10045/118166
ISSN: 0013-4686 (Print) | 1873-3859 (Online)
DOI: 10.1016/j.electacta.2021.139222
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Revisión científica: si
Versión del editor: https://doi.org/10.1016/j.electacta.2021.139222
Aparece en las colecciones:INV - EQSUP - Artículos de Revistas

Archivos en este ítem:
Archivos en este ítem:
Archivo Descripción TamañoFormato 
ThumbnailAuer_etal_2021_ElectrochimActa.pdf3,45 MBAdobe PDFAbrir Vista previa


Este ítem está licenciado bajo Licencia Creative Commons Creative Commons