Automotive exhaust gases formed in the gasoline engines contain many environmentally
harmful compounds. As a result of incomplete combustion, exhaust gases can include
carbon monoxide (CO) and hydrocarbons (HC). A typical composition of exhaust gases is
presented in Table 1. Catalytic purification has proven to be an efficient way to reduce
emissions from exhaust gases. Due to the increased demand for low-emission vehicles,
most automobiles are currently supplied with a three-way catalytic converter (TWC) for
the simultaneous removal of major pollutants CO, NOX and HC from a gasoline engine’s
exhaust gases (Heck & Farrauto 2001).