Pt-grown carbon nanofibers for detection of hydrogen peroxide
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http://hdl.handle.net/10045/74771
Títol: | Pt-grown carbon nanofibers for detection of hydrogen peroxide |
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Autors: | Isoaho, Noora | Sainio, Sami | Wester, Niklas | Botello, Luis | Johansson, Leena-Sisko | Peltola, Emilia | Climent, Victor | Feliu, Juan M. | Koskinen, Jari | Laurila, Tomi |
Grups d'investigació o GITE: | Electroquímica de Superficies |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Paraules clau: | Pt catalyst | Carbon nanofibers | Hydrogen peroxide |
Àrees de coneixement: | Química Física |
Data de publicació: | 3-d’abril-2018 |
Editor: | Royal Society of Chemistry |
Citació bibliogràfica: | RSC Advances. 2018, 8: 12742-12751. doi:10.1039/C8RA01703D |
Resum: | Removal of left-over catalyst particles from carbon nanomaterials is a significant scientific and technological problem. Here, we present the physical and electrochemical study of application-specific carbon nanofibers grown from Pt-catalyst layers. The use of Pt catalyst removes the requirement for any cleaning procedure as the remaining catalyst particles have a specific role in the end-application. Despite the relatively small amount of Pt in the samples (7.0 ± 0.2%), they show electrochemical features closely resembling those of polycrystalline Pt. In O2-containing environment, the material shows two separate linear ranges for hydrogen peroxide reduction: 1–100 μM and 100–1000 μM with sensitivities of 0.432 μA μM−1 cm−2 and 0.257 μA μM−1 cm−2, respectively, with a 0.21 μM limit of detection. In deaerated solution, there is only one linear range with sensitivity 0.244 μA μM−1 cm−2 and 0.22 μM limit of detection. We suggest that the high sensitivity between 1 μM and 100 μM in solutions where O2 is present is due to oxygen reduction reaction occurring on the CNFs producing a small additional cathodic contribution to the measured current. This has important implications when Pt-containing sensors are utilized to detect hydrogen peroxide reduction in biological, O2-containing environment. |
Patrocinadors: | Academy of Finland (E. P. grant #274670, T. L. grant #285526), Biocentrum Helsinki and Finnish Cultural Foundation are acknowledged for funding. J. F. and V. C. acknowledge financial funding from the Ministerio de Economia, Industria y Competitividad (CTQ2016-76221 P). |
URI: | http://hdl.handle.net/10045/74771 |
ISSN: | 2046-2069 |
DOI: | 10.1039/C8RA01703D |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence |
Revisió científica: | si |
Versió de l'editor: | https://doi.org/10.1039/C8RA01703D |
Apareix a la col·lecció: | INV - EQSUP - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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2018_Isoaho_etal_RSCAdv.pdf | 1,31 MB | Adobe PDF | Obrir Vista prèvia | |
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