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Highly sensitive, selective, and stable hydrogen peroxide (H2O2) detection using nanozyme-based catalysts are desirable for practical applications. Herein, vertical α -FeOOH nanowires were successfully grown on the surface of carbon fiber paper (CFP) via a low-temperature hydrothermal procedure. The formation of vertical α -FeOOH nanowires is ascribed to the structure-directing role of sodium dodecyl sulfate. The resulting free-standing electrode with one-dimensional (1D) nanowires offers oriented channels for fast charge transfer, excellent electrical contact between the electrocatalyst and the current collector, and good mechanical stability and reproducibility. Thus, it can serve as an efficient electrocatalyst for the reduction and sensitive detection of H2O2. The relation of the oxidation current of H2O2 with the concentration is linear from 0.05 to 0.5 mM with a sensitivity of -0.194 mA/(mM·cm2) and a low detection limit of 18 μM. Furthermore, the portability in the geometric tailor and easy device fabrication allow extending the general applicability of this free-standing electrode to chemical and biological sensors.

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Publication history

Received: 07 January 2016
Revised: 10 April 2016
Accepted: 21 April 2016
Published: 24 May 2016
Issue date: August 2016

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© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

We gratefully acknowledge the support of this research by the Key Program Projects of the National Natural Science Foundation of China (No. 21031001), the National Natural Science Foundation of China (Nos. 21371053 and 21573062), the Cultivation Fund of the Key Scientific and Technical Innovation Project, Program for Innovative Research Team in University (No. IRT-1237), Application Technology Research and Development Projects in Harbin (No. 2013AE4BW051), International Science & Technology Cooperation Program of China (No. 2014DFR41110), and the Foundation of Heilongjiang Province of China (No. QC2013C009).

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Email: nanores@tup.tsinghua.edu.cn

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