An oxygen reduction sensor based on a novel type of porous carbon composite membrane electrode

The development of a simple, efficient and sensitive sensor for dissolved oxygen is proposed using a novel type of porous carbon composite membrane/glassy carbon electrode based on the low-cost common filter paper by a simple method. The resulting device exhibited excellent electrocatalytic activities toward the oxygen reduction reaction. Scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and electrochemical measurements demonstrated that the porous morphology and uniformly dispersed Fe3C nanoparticles of the PCCM play an important role in the oxygen reduction reaction. A linear response range from 2 μmol/L up to 110 μmol/L and a detection limit of 1.4 μmol/L was obtained with this sensor. The repeatability of the proposed sensor, evaluated in terms of relative standard deviation, was 3.0%. The successful fabrication of PCCM/GC electrode may promote the development of new porous carbon oxygen reduction reaction material for the oxygen reduction sensor.

Graphical abstractA simple, efficient and sensitive sensor for the detection of dissolved oxygen is proposed using a novel type of porous carbon composite membrane/glassy carbon electrode (PCCM/GCE) assembled using low-cost common filter paper by a simple method.Figure optionsDownload full-size imageDownload as PowerPoint slide