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Título: | High Redox Potential Cathode Based on Laccase Covalently Attached to Gold Electrode |
Autor: | Pita, Marcos CSIC ORCID ; Gutiérrez Sánchez, Cristina; Olea, David CSIC; Vélez, Marisela CSIC ORCID; García Diego, Cristina; Shleev, Sergey; Fernández López, Víctor Manuel; López de Lacey, Antonio CSIC ORCID | Palabras clave: | Laccase Gold Biocathode Diazonium salt Direct electron transfer |
Fecha de publicación: | 17-jun-2011 | Editor: | American Chemical Society | Citación: | Journal of Physical Chemistry C | Resumen: | A new strategy for oriented covalent immobilization of Trametes hirsuta laccase on gold electrodes is presented. The strategy is based on the gold surface modification with a mixed monolayer of an aromatic diazonium salt derivative and 6-mercapto-1-hexanol for further use as scaffold for the enzyme’s covalent linkage. This strategy offers a variety of advantages such as high stability and laccase-friendly support morphology, which turns it into a suitable metal-enzyme interface. Conditions aiming at optimum orientation for direct electron transfer (DET) via the T1 copper site were studied. Current density values up to 40 μA·cm-2 were measured for the electrocatalytic reduction of O2 in absence of redox mediators. This strategy is a big step forward in the development of laccase-modified gold electrodes for bioelectrocatalytic reduction of O2. | Versión del editor: | http://doi.org/10.1021/jp203643h | URI: | http://hdl.handle.net/10261/54208 | DOI: | 10.1021/jp203643h | ISSN: | 1932-7447 | E-ISSN: | 1932-7455 |
Aparece en las colecciones: | (ICP) Artículos |
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Paper-DeLacey-Pita Revised DIGITAL CSIC VERSION.pdf | 3,43 MB | Adobe PDF | Visualizar/Abrir |
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