Fabrication of a Sensitive Sensor for Oxygen Using Nitrogen-Doped Carbon Nanotubes-Fe3C Nanoparticles

The development of a simple, efficient and sensitive sensor for dissolved oxygen is proposed using a new one-dimensional nitrogen-doped carbon nanotubes(NCNTs)-Fe3C nanoparticle (NPs) composite membrane/glassy carbon electrode by a one-pot, large-scale protocol for the controlled synthesis route. The obtained material exhibited excellent electrocatalytic activities toward the oxygen reduction reaction. A linear response range from 1.5 up to 90 mu M and detection limit of 0.6 mu M was obtained with this sensor. The successful fabrication of NCNTs-Fe(3)CNPs/GC electrode may promote the development of opening new avenue for the application of Fe3C NPs-based composite materials in high-efficiency electrocatalysts for the oxygen reduction sensor. (c) 2015 The Electrochemical Society. All rights reserved.