Highly selective NOx sensor in the presence of NH3

摘要

An improved NO_x sensor with an NH₃ oxidation catalyst. A sensor module may include a support component, a NO_x sensing material positioned on the support component, and an NH₃ oxidation catalyst. The NH₃ oxidation catalyst may be layered on top of the NO_x sensing material or the NH₃ oxidation catalyst may be positioned upstream of the NO_x sensing material such that the NH₃ oxidation catalyst selectively converts NH₃ to N₂ while permitting NO_x through to the NO_x sensing material.