Enormous enhancement of Pt/SnO2 sensors response and selectivity by their reduction, to CO in automotive exhaust gas pollutants including CO, NOx and C3H8

Cheap sensors are necessary for detection of automotive exhaust gas pollutants, to diagnose the fuel injector, engine and catalytic converter performances. SnO2 and Pt/SnO2 sensors reduced in CO were used for highly sensitive and selective detection of CO as the major pollutant in automotive exhaust gases. SnO2 was prepared by a sol–gel method, on which Pt nanoparticles were deposited by an impregnation method. The sensors were reduced in 1%CO...