... In this way, when the NO2 on the surface of the platinum Pt reacts with HC and CO in the reducing agent, and when the NO2 no longer exists on the surface of the platinum R, the ... emitted from the engine are reduced by the HC and CO remaining on the platinum Pt. This oxidation of the HC and CO consumes the oxygen component existing near the NO, absorbent, and the concentration ... 16 Methods for Monitoring and Diagnosing the Eficiency of Catalytic Converters the absorbent in the form of nitric acid ions NO3 (fig. Sa). In this way, NO, is absorbed in the NO,...