Improvement of the Current Efficiency of the Ti/Sn-Sb-Ni Oxide Electrode via Carbon Nanotubes for Ozone Generation

Nanocrystalline coatings of a Sn-Sb-Ni-CNT composite were applied on titanium mesh using a dip coating and annealing procedure, and investigated as anode material for ozone generation in perchloric acid. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to reveal the electrode composition and morphology, and voltammetry and current efficiency measurements for electrochemical characterization. Addition of CNT resulted in coatings with a higher loading, a higher onset potential for oxygen evolution and in a higher current efficiency for ozone generation. A long term test of the CNT-containing electrodes at a constant current density (53.5 mA/cm(2)) for 17 h indicated a stable anode potential. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.jes112940] All rights reserved.