Autotolerant ceruloplasmin based biocathodes for implanted biological power sources

Aleksejeva, Olga; Sokolov, A. V.; Márquez, Inmaculada; Gustafsson, Anna; Bushnev, Sergey; Eriksson, Håkan; Ljunggren, Lennart; Shleev, Sergey

doi:10.1016/j.bioelechem.2021.107794

Cited by 1 publication

(2 citation statements)

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“…From the point of view of immunogenicity, the ideal implanted BFC could be based on a ceruloplasmin cathode. However, the current density obtained with ceruloplasmin cathodes without a mediator was only 1.65 µA/cm 2 [31]. Thus, the bacterial laccase could be an optimal variant possessing moderate current density values and (possibly) moderate immunogenicity compared to fungal enzymes.…”

Section: Discussionmentioning

confidence: 96%

“…Its high redox potential value is very attractive from the point of view of developing an oxygen reduction catalyst functioning at minimal overpotential values (the property currently held only by platinum catalysts), but the electrochemical studies of this protein revealed that it is really hard to achieve an oxygen reduction current after its immobilization onto electrode surfaces. Only recently, Aleksejeva and colleagues achieved the first measurable oxygen reduction currents with ceruloplasmin cathodes, but the current density was only 1.65 µA/cm 2 without a redox mediator and 12 µA/cm 2 with a redox mediator [31].…”

Section: Introductionmentioning

confidence: 99%

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Functionalization of MWCNTs for Bioelectrocatalysis by Bacterial Two-Domain Laccase from Catenuloplanes japonicus

Abdullatypov,

Oskin,

Fedina

et al. 2023

Nanomaterials

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This study was carried out in order to assess several modifications of carbon nanotube-based nanomaterials for their applications in laccase electrodes and model biofuel cells. The modified MWCNTs served as adapters for the immobilization of laccase from Catenuloplanes japonicus VKM Ac-875 on the surface of electrodes made of graphite rods and graphite paste. The electrochemical properties of the electrodes were tested in linear and cyclic voltammetrical measurements for the determination of the redox potential of the enzyme and achievable current densities. The redox potential of the enzyme was above 500 mV versus NHE, while the highest current densities reached hundreds of µA/cm2. Model biofuel cells on the base of the laccase cathodes had maximal power values from 0.4 to 2 µW. The possibility of practical application of such BFCs was discussed.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%