Abnormal gas sensing characteristics arising from catalyzed morphological changes of ionsorbed oxygen.
Abnormal gas sensing characteristics are observed at low temperature in uniformly loaded Pt@SnO(2) nanorod gas sensors. The sensors operated at 200 degrees C exhibit opposite variations of resistances, and the change of resistance decreases with increasing ethanol concentration. In contrast, the sensors operated at 300 degrees C show regular behavior and the sensitivity is extremely high. Such behaviors are ascribed to Pt-catalyzed morphological changes of ionsorbed oxygen at low temperature. The present results are the bases for further investigating the effect of ionsorbed oxygen morphologies on gas sensing.
Xue
Xin-Yu
XY
College of Sciences, Northeastern University, Shenyang, People's Republic of China. xuexinyu@mail.neu.edu.cn
Chen
Zhao-Hui
ZH
Chen
Yu-Jin
YJ
Ma
Chun-Hua
CH
Xing
Li-Li
LL
Wang
Yan-Guo
YG
Wang
Tai-Hong
TH