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Two-dimensional gra...
Two-dimensional graphene paper supported flexible enzymatic fuel cells
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- Shen, Fei (author)
- Technical University of Denmark
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- Pankratov, Dmitry (author)
- Technical University of Denmark
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- Halder, Arnab (author)
- Technical University of Denmark
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- Xiao, Xinxin (author)
- Technical University of Denmark
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- Toscano, Miguel D. (author)
- Novozymes A/S
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- Zhang, Jingdong (author)
- Technical University of Denmark
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- Ulstrup, Jens (author)
- Technical University of Denmark
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- Gorton, Lo (author)
- Lund 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
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- Chi, Qijin (author)
- Technical University of Denmark
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(creator_code:org_t)
- 2019
- 2019
- English 9 s.
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In: Nanoscale Advances. - : Royal Society of Chemistry (RSC). - 2516-0230. ; 1:7, s. 2562-2570
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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