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Proceedings 2017, 1(4), 630; doi:10.3390/proceedings1040630

Electrochemical Multisensor System for Monitoring the Hydrogen Peroxide Direct Synthesis in Microreactors

1
Laboratory for Sensors, IMTEK—Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany
2
Institute for Micro Process Engineering (IMVT), Karlsruhe Institute of Technology, Karlsruhe, Germany
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 8 August 2017
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Abstract

We present an electrochemical sensor system for the detection of hydrogen peroxide inside a direct synthesis microreactor. The setup allows the online, in situ measurement of high reactant concentrations by amperometric detection across the micro channel width and length. The robust integration of the electrochemical cell in the microreactor was demonstrated. Hydrogen peroxide was detected under reaction conditions (pH 3–4, presence of bromide) showing linear behaviour up to 2 mM with high sensitivity and excellent stability. The linear range was increased up to 10 mM by applying a diffusion limiting pHEMA layer to the electrode surface.
Keywords: hydrogen peroxide; microreactor; microsensor; amperometry; electrochemistry hydrogen peroxide; microreactor; microsensor; amperometry; electrochemistry
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Urban, S.; Weltin, A.; Flamm, H.; Kieninger, J.; Deschner, B.J.; Kraut, M.; Dittmeyer, R.; Urban, G.A. Electrochemical Multisensor System for Monitoring the Hydrogen Peroxide Direct Synthesis in Microreactors. Proceedings 2017, 1, 630.

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