Publication

The influence of surface composition of carbon nanotubes on the photobioelectrochemical activity of thylakoid bioanodes mediated by osmium-complex modified redox polymer

Pankratov, Dmitry
Zhao, Jianming
Nur, Mohammed Ahmed
Shen, Fei
Leech, Dónal
Chi, Qijin
Pankratova, Galina
Gorton, Lo
Citation
Pankratov, Dmitry, Zhao, Jianming, Nur, Mohammed Ahmed, Shen, Fei, Leech, Dónal, Chi, Qijin, Pankratova, Galina, Gorton, Lo. (2019). The influence of surface composition of carbon nanotubes on the photobioelectrochemical activity of thylakoid bioanodes mediated by osmium-complex modified redox polymer. Electrochimica Acta, 310, 20-25. doi: https://doi.org/10.1016/j.electacta.2019.04.097
Abstract
A combination of photosynthetic biocatalysts with high surface area conductive materials mediated by an osmium-complex modified redox polymer (OsRP) holds promising features for the development of sustainable "green" systems for solar energy conversion. In this work we performed a comparative study of two types of carbon nanotubes (CNTs) synthesized by pyrolysis of polymeric precursors. Both CNTs were of similar morphology, but had a different surface C/O ratio. The CNTs were utilized as a support for immobilization of thylakoid membranes, electrochemically wired through the OsRP. The photobioanodes based on the CNTs with a higher C/O ratio exhibit a higher maximum photocurrent density of 97.1 +/- 8.3 mu A cm(-2) at a light intensity of 400 W m(-2) with reduced charge transfer resistance, but had lower operational stability. Our results demonstrate the significance of investigating of electrochemical communication between the photosynthetic component, the redox mediator and the support nano-material and may offer new opportunities for designing and optimization of mediated bioelectrochemical systems. (C) 2019 Elsevier Ltd. All rights reserved.
Publisher
Elsevier
Publisher DOI
10.1016/j.electacta.2019.04.097
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland