ACS Applied Materials & Interfaces · 2015 · 254 citations · 21 references
Natural SciencesChemical EngineeringMaterials ScienceNanomaterialsSensorsSurface ScienceChemical SensorsGas SensorsMetal Oxide NanomaterialsNanoparticle SurfacesNanosensorsSurface AdsorptionAdsorption BehaviorHumidityHumidity SensingMetal Oxide Gas SensorsNanostructured Gas SensorsNanostructured SensorsSurface Oxygen AdsorptionWater Vapor Effects
The effect of water vapor on Pd-loaded SnO2 sensor was investigated through the oxygen adsorption behavior and sensing properties toward hydrogen and CO under different humidity conditions. On the basis of the theoretical model reported previously, it was found that the mainly adsorbed oxygen species on the SnO2 surface in humid atmosphere was changed by loading Pd, more specifically, for neat SnO2 was O(-), while for 0.7% Pd-SnO2 was O(2-). The water vapor poisoning effect on electric resistance and sensor response was reduced by loading Pd. Moreover the sensor response in wet atmosphere was greatly enhanced by loading Pd. It seems that the electron depletion layer by p-n junction of PdO-SnO2 may impede OH(-) adsorption.
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A New Detector for Gaseous Components Using Semiconductive Thin Films.
Tetsuro Seiyama, Akio Kato, Kiyoshi Fujiishi et al. · Analytical Chemistry · 1962 · 1.5K citations
Interactions of tin oxide surface with O2, H2O AND H2
Noboru Yamazoe, Jun Fuchigami, Masato Kishikawa et al. · Surface Science · 1979 · 833 citations
Natural Sciences, Materials Engineering, Materials Science +14