Sensors, Vol. 19, Pages 3741: Screen-Printed Soft-Nitrided Carbon Electrodes for Detection of Hydrogen Peroxide

Sensors, Vol. 19, Pages 3741: Screen-Printed Soft-Nitrided Carbon Electrodes for Detection of Hydrogen Peroxide
Sensors doi: 10.3390/s19173741
Authors:
Chidiebere I. Ogbu
Xu Feng
Samson N. Dada
Gregory W. Bishop

Nitrogen-doped carbon materials have garnered much interest due to their electrocatalytic activity towards important reactions such as the reduction of hydrogen peroxide. N-doped carbon materials are typically prepared and deposited on solid conductive supports, which can sometimes involve time-consuming, complex, and/or costly procedures. Here, nitrogen-doped screen-printed carbon electrodes (N-SPCEs) were fabricated directly from a lab-formulated ink composed of graphite that was modified with surface nitrogen groups by a simple soft nitriding technique. N-SPCEs prepared from inexpensive starting materials (graphite powder and urea) demonstrated good electrocatalytic activity towards hydrogen peroxide reduction. Amperometric detection of H2O2 using N-SPCEs with an applied potential of −0.4 V (vs. Ag/AgCl) exhibited good reproducibility and stability as well as a reasonable limit of detection (2.5 µM) and wide linear range (0.020 to 5.3 mM).

Source: Sensors - August 28, 2019 Category: Biotechnology Authors: Chidiebere I. Ogbu Xu Feng Samson N. Dada Gregory W. Bishop Tags: Article Source Type: research