The oxidation of borohydride ion at titanate nanotube supported gold electrodes

Steady state voltammetry was used to study the oxidation of 0.02 mol dm−3 borohydride ion (in 3 mol dm−3 NaOH at 298 K) at three gold-based electrodes, namely: (a) a commercially available gold on Vulcan carbon Au/C, supported by carbon felt resulting in a 0.5 mg cm−2 of Au loading, (b) gold nanoparticles deposited on titanate nanotubes with approximately 0.1 mg cm−2 loading Au and (c) gold foil. Gold nanoparticles which are well dispersed onto titanate nanotubes can produce currents within the same order of magnitude as the Au/C and Au foil electrodes and represent an option for anode materials in a direct borohydride fuel cell.