Effect of Water Vapor on Pd-Loaded SnO2 Nanoparticles Gas Sensor

被引：216
作者：
Ma, Nan [1 ]
Suematsu, Koichi [2 ]
Yuasa, Masayoshi [2 ]
Kida, Tetsuya [3 ]
Shimanoe, Kengo [2 ]
机构：
[1] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Fukuoka 8168580, Japan
[2] Kyushu Univ, Fac Engn Sci, Fukuoka 8168580, Japan
[3] Kumamoto Univ, Dept Appl Chem & Biochem, Kumamoto 8608555, Japan
来源：
ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 10期
关键词：
SnO2; nanoparticles; Pd loading water vapor; oxygen adsorption; H-2; CO; TIN DIOXIDE; RECEPTOR FUNCTION; CO; SURFACE; MECHANISM; CATALYSTS;
D O I：
10.1021/am509082w
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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-SnO, was O2-. 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.
引用
收藏
页码：5863 / 5869
页数：7
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