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Two-dimensional graphene paper supported flexible enzymatic fuel cells

Shen, Fei ; Pankratov, Dmitry ; Halder, Arnab ; Xiao, Xinxin ; Toscano, Miguel D. ; Zhang, Jingdong ; Ulstrup, Jens ; Gorton, Lo LU and Chi, Qijin (2019) In Nanoscale Advances 1(7). p.2562-2570
Abstract

Application of enzymatic biofuel cells (EBFCs) in wearable or implantable biomedical devices requires flexible and biocompatible electrode materials. To this end, freestanding and low-cost graphene paper is emerging among the most promising support materials. In this work, we have exploited the potential of using graphene paper with a two-dimensional active surface (2D-GP) as a carrier for enzyme immobilization to fabricate EBFCs, representing the first case of flexible graphene papers directly used in EBFCs. The 2D-GP electrodes were prepared via the assembly of graphene oxide (GO) nanosheets into a paper-like architecture, followed by reduction to form layered and cross-linked networks with good mechanical strength, high conductivity... (More)

Application of enzymatic biofuel cells (EBFCs) in wearable or implantable biomedical devices requires flexible and biocompatible electrode materials. To this end, freestanding and low-cost graphene paper is emerging among the most promising support materials. In this work, we have exploited the potential of using graphene paper with a two-dimensional active surface (2D-GP) as a carrier for enzyme immobilization to fabricate EBFCs, representing the first case of flexible graphene papers directly used in EBFCs. The 2D-GP electrodes were prepared via the assembly of graphene oxide (GO) nanosheets into a paper-like architecture, followed by reduction to form layered and cross-linked networks with good mechanical strength, high conductivity and little dependence on the degree of mechanical bending. 2D-GP electrodes served as both a current collector and an enzyme loading substrate that can be used directly as a bioanode and biocathode. Pyrroloquinoline quinone dependent glucose dehydrogenase (PQQ-GDH) and bilirubin oxidase (BOx) adsorbed on the 2D-GP electrodes both retain their biocatalytic activities. Electron transfer (ET) at the bioanode required Meldola blue (MB) as an ET mediator to shuttle electrons between PQQ-GDH and the electrode, but direct electron transfer (DET) at the biocathode was achieved. The resulting glucose/oxygen EBFC displayed a notable mechanical flexibility, with a wide open circuit voltage range up to 0.665 V and a maximum power density of approximately 4 μW cm-2 both fully competitive with reported values for related EBFCs, and with mechanical flexibility and facile enzyme immobilization as novel merits.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanoscale Advances
volume
1
issue
7
pages
9 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85072025854
ISSN
2516-0230
DOI
10.1039/c9na00178f
language
English
LU publication?
yes
id
f3ae5717-d485-4832-8c48-c949d00da78c
date added to LUP
2019-09-17 13:05:13
date last changed
2020-08-05 05:32:55
@article{f3ae5717-d485-4832-8c48-c949d00da78c,
  abstract     = {<p>Application of enzymatic biofuel cells (EBFCs) in wearable or implantable biomedical devices requires flexible and biocompatible electrode materials. To this end, freestanding and low-cost graphene paper is emerging among the most promising support materials. In this work, we have exploited the potential of using graphene paper with a two-dimensional active surface (2D-GP) as a carrier for enzyme immobilization to fabricate EBFCs, representing the first case of flexible graphene papers directly used in EBFCs. The 2D-GP electrodes were prepared via the assembly of graphene oxide (GO) nanosheets into a paper-like architecture, followed by reduction to form layered and cross-linked networks with good mechanical strength, high conductivity and little dependence on the degree of mechanical bending. 2D-GP electrodes served as both a current collector and an enzyme loading substrate that can be used directly as a bioanode and biocathode. Pyrroloquinoline quinone dependent glucose dehydrogenase (PQQ-GDH) and bilirubin oxidase (BOx) adsorbed on the 2D-GP electrodes both retain their biocatalytic activities. Electron transfer (ET) at the bioanode required Meldola blue (MB) as an ET mediator to shuttle electrons between PQQ-GDH and the electrode, but direct electron transfer (DET) at the biocathode was achieved. The resulting glucose/oxygen EBFC displayed a notable mechanical flexibility, with a wide open circuit voltage range up to 0.665 V and a maximum power density of approximately 4 μW cm<sup>-2</sup> both fully competitive with reported values for related EBFCs, and with mechanical flexibility and facile enzyme immobilization as novel merits.</p>},
  author       = {Shen, Fei and Pankratov, Dmitry and Halder, Arnab and Xiao, Xinxin and Toscano, Miguel D. and Zhang, Jingdong and Ulstrup, Jens and Gorton, Lo and Chi, Qijin},
  issn         = {2516-0230},
  language     = {eng},
  number       = {7},
  pages        = {2562--2570},
  publisher    = {Royal Society of Chemistry},
  series       = {Nanoscale Advances},
  title        = {Two-dimensional graphene paper supported flexible enzymatic fuel cells},
  url          = {http://dx.doi.org/10.1039/c9na00178f},
  doi          = {10.1039/c9na00178f},
  volume       = {1},
  year         = {2019},
}