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Title: 3D grapheme-cobalt oxide electrode for high-performance supercapacitor and enzymeless glucose detection
Authors: Dong, Xiaochen
Xu, Hang
Wang, Xuewan
Zhang, Hua
Wang, Lianhui
Huang, Wei
Chen, Peng
Huang, Yinxi
Chan-Park, Mary B.
Issue Date: 2012
Source: Dong, X.-C., Xu, H., Wang, X.-W., Huang, Y., Chan-Park, M. B., Zhang, H., et al. (2012). 3D Graphene–Cobalt Oxide Electrode for High-Performance Supercapacitor and Enzymeless Glucose Detection. ACS Nano, 6(4), 3206-3213.
Series/Report no.: ACS nano
Abstract: Using a simple hydrothermal procedure, cobalt oxide (Co3O4) nanowires were in situ synthesized on three-dimensional (3D) graphene foam grown by chemical vapor deposition. The structure and morphology of the resulting 3D graphene/Co3O4 composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy. The 3D graphene/Co3O4 composite was used as the monolithic free-standing electrode for supercapacitor application and for enzymeless electrochemical detection of glucose. We demonstrate that it is capable of delivering high specific capacitance of 1100 F g–1 at a current density of 10 A g–1 with excellent cycling stability, and it can detect glucose with a ultrahigh sensitivity of 3.39 mA mM–1 cm–2 and a remarkable lower detection limit of <25 nM (S/N = 8.5).
ISSN: 1936-0851
DOI: 10.1021/nn300097q
Rights: © 2012 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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