Encapsulated Laccases as Effective Electrocatalysts for Oxygen Reduction Reactions

The efficient electronic wiring of silica-encapsulated laccases has been applied for the first time to the bioelectrocatalytic reduction of oxygen. The synthesized silica/laccase composites were evaluated electrochemically and characterized by UV-vis, Fourier transform infrared (FT-IR), dynamic light scattering, and X-ray photoelectron spectroscopy. FT-IR measurements showed that laccase preserved its native-like structure after the biosilicification process. The one-pot biosilicification synthesis facilitated the accommodation of the enzymes in highly effective orientations for the direct electron transfer of the T1 redox centers. Consequently, the biosilicified laccase deposited on Ni electrodes exhibited an efficient bioelectrocatalytic oxygen reduction, with current densities of up to 0.94 mA/cm2. Copyright © 2018 American Chemical Society.

Authors
Franco A.1 , Cebrián-García S.1 , Rodríguez-Padrón D.1 , Puente-Santiago A.R.1 , Munoz-Batista M.J.1 , Caballero A.2 , Balu A.M.1 , Romero A.A.1 , Luque R. 1, 3
Journal
ACS Sustainable Chemistry and Engineering
Publisher
American Chemical Society
Number of issue
8
Language
English
Pages
11058-11062
Status
Published
Link
External link
DOI
10.1021/acssuschemeng.8b02529
Volume
6
Year
2018
Organizations
  • 1 Department of Organic Chemistry, Institute of Fine Chemistry, University of Cordoba, Campus de Rabanales, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, Cordoba, E14014, Spain
  • 2 Department of Inorganic Chemistry, Institute of Fine Chemistry, University of Cordoba, Campus de Rabanales, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, Cordoba, E14014, Spain
  • 3 People's Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya str., Moscow, 117198, Russian Federation
Keywords
Bioelectrocatalysis; Direct electron transfer; Encapsulated laccases; Orientation
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/6470/
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