Flame-Made Pt-Loaded TiO₂ Thin Films and Their Application as H₂ Gas Sensors

Figure 7

Schematic gas-sensing mechanisms of Pt-loaded TiO₂ nanoparticles with (a) optimal Pt concentration (2.00 mol%) and (b) excessive Pt concentration (3.00 mol%) at low operating temperature (300°C) and (c) with optimal Pt concentration at high operating temperature (350–400°C).

(a)

(b)

(c)