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  • Shen, FeiTechnical University of Denmark (author)

Two-dimensional graphene paper supported flexible enzymatic fuel cells

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • 2019
  • Royal Society of Chemistry (RSC),2019
  • 9 s.

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:f3ae5717-d485-4832-8c48-c949d00da78c
  • https://lup.lub.lu.se/record/f3ae5717-d485-4832-8c48-c949d00da78cURI
  • https://doi.org/10.1039/c9na00178fDOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • 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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  • Pankratov, DmitryTechnical University of Denmark (author)
  • Halder, ArnabTechnical University of Denmark (author)
  • Xiao, XinxinTechnical University of Denmark (author)
  • Toscano, Miguel D.Novozymes A/S (author)
  • Zhang, JingdongTechnical University of Denmark (author)
  • Ulstrup, JensTechnical University of Denmark (author)
  • Gorton, LoLund University,Lunds universitet,Biokemi och Strukturbiologi,Centrum för Molekylär Proteinvetenskap,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biochemistry and Structural Biology,Center for Molecular Protein Science,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)akem-lgo (author)
  • Chi, QijinTechnical University of Denmark (author)
  • Technical University of DenmarkNovozymes A/S (creator_code:org_t)

Related titles

  • In:Nanoscale Advances: Royal Society of Chemistry (RSC)1:7, s. 2562-25702516-0230

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