Abstract
Pd-loaded and Fe-doped SnO2 was prepared by sol–gel method. The composition, morphology and electrochemical property of the material were characterized by XRD, SEM and electrochemical workstation respectively. The results showed that Pd-loaded and Fe-doped SnO2 had the same crystal structure as pure SnO2, and the crystalline degree was reduced with the increasing of doping amounts of Fe. In addition, the sample had a higher response value of CO when modifying with Fe/Pd. When adding amounts were 10mol% Fe and 0.2mol% Pd, the composite had the highest sensitivity and selectivity to CO in range of 200–3000ppm at 350°C. The response value of the composite material to 2000ppm CO was raised 13 times than that of pure SnO2. The results also showed that Pd-loaded and Fe-doped SnO2 had drastically enhanced the selectivity of CO against H2 than pure SnO2.
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