Highly activated screen-printed carbon electrodes by electrochemical treatment with hydrogen peroxide

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/75411
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Title: Highly activated screen-printed carbon electrodes by electrochemical treatment with hydrogen peroxide
Authors: González-Sánchez, María I. | Gómez-Monedero, Beatriz | Agrisuelas, Jerónimo | Iniesta, Jesus | Valero, Edelmira
Research Group/s: Electroquímica Aplicada y Electrocatálisis
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Screen-printed carbon electrodes | Hydrogen peroxide | Electrochemical activation | Sensors
Knowledge Area: Química Física
Issue Date: Jun-2018
Publisher: Elsevier
Citation: Electrochemistry Communications. 2018, 91: 36-40. doi:10.1016/j.elecom.2018.05.002
Abstract: An easy effective method for the activation of commercial screen-printed carbon electrodes (SPCEs) using H2O2 is presented to enhance sensing performances of carbon ink. Electrochemical activation consists of 25 repetitive voltammetric cycles at 10 mV s−1 using 10 mM H2O2 in phosphate buffer (pH 7). This treatment allowed us to reach a sensitivity of 0.24 ± 0.01 μA μM−1 cm−2 for the electroanalysis of H2O2, which is 140-fold higher than that of untreated SPCEs and 6-fold more than screen-printed platinum electrodes (SPPtEs). Electrode surface properties were characterized by SEM, EIS and XPS. The results revealed atomic level changes at the electrode surface, with the introduction of new carbon‑oxygen groups being responsible for improved electro-transfer properties and sensitivity. Our method was compared with other previously described ones. The methodology is promising for the activation of commercial carbon inks-based electrodes for sensor applications.
Sponsor: This work was funded by the Spanish Ministry of Economy and Competitiveness (MINECO, http://www.mineco.gob.es/portal/site/mineco/idi), Projects No. BFU2016-75609-P (cofunded with FEDER funds, EU) and CTQ2016-76231-C2-2-R. BGM is a post-doctoral research fellow of the Youth Employment Initiative (JCCM, Spain, cofounded with ESF funds, EU).
URI: http://hdl.handle.net/10045/75411
ISSN: 1388-2481 (Print) | 1873-1902 (Online)
DOI: 10.1016/j.elecom.2018.05.002
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Elsevier B.V.
Peer Review: si
Publisher version: https://doi.org/10.1016/j.elecom.2018.05.002
Appears in Collections:INV - LEQA - Artículos de Revistas

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