Operando DRIFT Measurements on a tin dioxide based gas sensor

Tin dioxide based gas sensors with 1% Pd doping were investigated by using DRIFT spectroscopy and DC resistance measurements in Operando conditions. The surface was characterized at 250 ∘C in synthetic air and the change of the surface species was monitored during the exposure to hydrogen and deuterium test gases. In this manner it was possible to follow which kind of hydrogen associated compounds are produced/consumed during the reaction with the test gas.