Effect of water vapor on Pd-loaded SnO2 nanoparticles gas sensor

ACS Applied Materials & Interfaces
Nan MaKengo Shimanoe

Abstract

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.

References

Oct 18, 2005·Chemical Communications : Chem Comm·Olga V SafonovaMichel Labeau
Sep 24, 2009·Physical Chemistry Chemical Physics : PCCP·Dorota KoziejJan-Dierk Grunwaldt
Mar 19, 2014·ACS Applied Materials & Interfaces·Koichi SuematsuKengo Shimanoe

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Citations

Jul 22, 2015·Analytical Chemistry·Koichi SuematsuKengo Shimanoe
Jun 27, 2015·ACS Applied Materials & Interfaces·Nan MaKengo Shimanoe
Jun 12, 2018·Chemical Society Reviews·Yoav Y BrozaHossam Haick
Feb 8, 2020·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xinyuan ZhouTie Wang
Jan 8, 2020·Mikrochimica Acta·Nicolay J PineauSotiris E Pratsinis
Jan 18, 2018·Sensors·Koichi SuematsuKengo Shimanoe
Jun 27, 2019·Scientific Reports·I Y HabibN T R N Kumara
Jan 10, 2021·Sensors·Vadim PlatonovAlexander Gaskov
May 14, 2021·Research : a Science Partner Journal·Jiacheng CaoWei Huang

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