2026-06-21T17:33:37Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/100492025-07-25T10:18:52Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845

Pérez Estébanez, Martín Perales Rondon, Juan Víctor Hernández Muñoz, Sheila Heras Vidaurre, Aránzazu Colina Santamaría, Álvaro 2025-01-29T07:33:56Z 2025-01-29T07:33:56Z 2024 0003-2700 http://hdl.handle.net/10259/10049 10.1021/acs.analchem.4c01132 1520-6882 Bidimensional spectroelectrochemistry (Bidim-SEC) is an instrumental technique that provides operando UV/vis absorption information on electrochemical processes from two different points of view, using concomitantly a parallel and a normal optical configuration. The parallel configuration provides information about chemical species present in the diffusion layer, meanwhile the normal arrangement supplies information about changes occurring both in the diffusion layer and, mainly, on the electrode surface. The choice of a suitable cell to perform Bidim-SEC experiments is critical, especially while working under a thin-layer regime. So far, most of the proposed Bidim-SEC cells rely on the use of spacers to define the thin-layer thickness, which leads to working with constant thickness values. Herein, we propose a novel Bidim-SEC cell that enables easy-to-use micrometric control of the thin-layer thickness using a piezoelectric positioner. This device can be used for the study of complex interfacial systems and also to easily measure the key parameters of an electrochemical process. As a proof of concept, the study of the roughening of a gold electrode in KCl medium is performed, identifying key steps in the passivation and nanoparticle generation on the gold surface. This work was funded by the Ministerio de Ciencia e Innovación and Agencia Estatal de Investigación (MCIN/AEI/10.13039/501100011033 and PID2020–113154RB-C21), Ministerio de Ciencia, Innovación y Universidades (RED2022–134120-T), and Junta de Castilla y León and European Regional Development Fund (Grant number: BU036P23). application/pdf eng American Chemical Society Analytical Chemistry. 2024, V. 96, n. 24, p. 9927-9934 https://doi.org/10.1021/acs.analchem.4c01132 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2017-2020/PID2020-113154RB-C21/ES/APLICACION DE NUEVOS MATERIALES Y DISPOSITIVOS PARA EC-SERS Y EC-SOERS/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica, Técnica y de Innovación 2021-2023/RED2022-134120-T/ES/RED DE SENSORES Y BIOSENSORES ELECTROQUIMICOS: RETOS ANTE LA TRANSFORMACION DIGITAL E INDUSTRIAL/ info:eu-repo/grantAgreement/Junta de Castilla y León//BU036P23//Desarrollo de técnicas analíticas in-situ y en condiciones operando para el estudio de electrocatalizadores para la conversión electroquímica de nitrato de amoniaco/ Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Absorption Electrochemical cells Electrodes Layers Thickness Química analítica Electroquímica Chemistry, Analytic Electrochemistry Bidimensional Spectroelectrochemistry with Tunable Thin-Layer Thickness info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Analytical Chemistry 96 24 9927 9934