A novel bacterial cellulose-based carbon paste electrode and its polyoxometalate-modified properties

A novel bacterial cellulose nanofiber-based carbon paste electrode (BCPE) was fabricated. It was characterized by scanning electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. Compared with traditional carbon paste electrode, BCPE exhibited better electrochemical reversibility with the enhancement of the redox currents and decrease of peak potential separation as well as lower charge transfer resistance in Fe(CN)(6)(3-/4-) redox system. Keggin-type sodium phosphopolyoxomolybdate, PMo12, was successfully assembled on BCPE via cyclic voltametric scan, and the obtained PMo12/BCPE possessed not only a good electrochemical behavior but also an excellent electrocatalytic activity toward the reduction of nitrite. Because of its nano-dimension, lower cost and prominent electrochemical properties, bacterial cellulose-based carbonaceous materials would be a candidate of graphite for the preparation of novel carbon paste electrode. (C) 2009 Elsevier B.V. All rights reserved.