Abstract
Hydrogen sensing ability of anatase TiO2 nanotubes powder loaded with nanoparticles of Pt is presented. The nanotubes powder of TiO2 with 5–6 μm length and 15–20 nm diameter, and a specific surface area of 130 m2/g was prepared by a novel rapid breakdown anodization technique in sodium chloride electrolyte. Pt nanoparticles with the chemisorption surface area of 97 m2/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.
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