Ogbu, Chidiebere I.Feng, XuDada, Samson N.Bishop, Gregory W.2019-09-062019-09-062019-08-29Ogbu, C.I.; Feng, X.; Dada, S.N.; Bishop, G.W. Screen-Printed Soft-Nitrided Carbon Electrodes for Detection of Hydrogen Peroxide. Sensors 2019, 19, 3741.http://hdl.handle.net/10919/93411Nitrogen-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).application/pdfenCreative Commons Attribution 4.0 Internationalscreen-printed electrodeamperometric sensornitrogen-doped carbonsoft nitridingArticle - Refereed2019-09-06https://doi.org/10.3390/s19173741