WO3/titanate protonated nanotubes used to disperse gold nanoparticles were prepared by the deposition-precipitation with urea method and tested in CO oxidation reaction. Remarkably enhanced CO oxidation activity was achieved with the addition of gold nanoparticles with respect to WO3/NT and Au/NT catalysts. XPS and H-2/TPR showed that when the samples were activated at 400 degrees C under hydrogen treatment, gold was present in the metallic Au form and tungsten as W5+ and W6+ species; likewise, the addition of tungsten to the tubular morphology led to the formation of vacancies and new adsorption sites, preserving the structure at up to 400 degrees C. The interaction between WO3 and the titanate nanotubes was improved by adding gold nanoparticles with sizes around 1 and 3 nm under hydrogen treatment, increasing the content of reduced W5+ species that promoted the CO oxidation at low temperatures. The 2Au-3WO(3)/NT catalyst was active from 0 degrees C and showed temporary stability at room temperature.