Room Temperature Hydrogen Sensing of Pt Loaded TiO2 Nanotubes Powders Prepared via Rapid Breakdown Anodization

Hydrogen sensing ability of anatase TiO2 nanotubes powder loaded with nanoparticles of Pt is presented. The nanotubes powder of TiO2 with 5-6 mu m length and 15-20 nm diameter, and a specific surface area of 130 m(2)/g was prepared by a novel rapid breakdown anodization technique in sodium chloride electrolyte. Pt nanoparticles with the chemisorption surface area of 97 m(2)/g were loaded over TiO2 nanotubes by chemical reduction of chloroplatinic acid with sodium borohydride. The screen-printed Pt-TiO2 nanotubes powder thick film exhibited a linear response to hydrogen concentration varying from 0 ppm to 1000 ppm in argon even at room temperature. (C) 2015 The Electrochemical Society. All rights reserved.