Catalytic oxidation performance with stable nitric oxide

摘要

A method for preparing a catalyst composition for producing a stable ratio of NO2 to NO in a compression ignition engine exhaust system is described. The method comprises (i) preparing a first composition comprising a platinum (Pt) compound disposed or supported on a support material; (ii) converting the platinum (Pt) compound to platinum (Pt) with a reducing agent. Reducing to prepare a second composition; and (iii) heating the second composition to at least 650 ° C. [Selection] Figure 3