What Materials are Commonly Used as Catalysts in Gas Sensors?
Several materials are commonly used as catalysts in gas sensors, each with unique properties that make them suitable for different applications. These include:
- Metal Oxides: Materials like titanium dioxide (TiO2) and zinc oxide (ZnO) are widely used due to their excellent catalytic properties and stability. - Noble Metals: Platinum (Pt), palladium (Pd), and gold (Au) are frequently employed for their superior catalytic activity, although their high cost can be a limiting factor. - Carbon-Based Materials: Graphene and carbon nanotubes are gaining popularity for their high surface area and excellent electrical conductivity.
