Thermoelectric hydrogen sensor working at room temperature prepared by bismuth-telluride P-N couples and Pt/γ-Al2O3
作者： Hu Huang , Weiling Luan , Jian-Song Zhang , Yun-Shi Qi , Shan-Tung Tu
DOI: 10.1016/J.SNB.2007.07.060
关键词: Analytical chemistry 、 Voltage 、 Thermoelectric effect 、 Volumetric flow rate 、 Hydrogen sensor 、 Bismuth telluride 、 Chemistry 、 Repeatability 、 Selectivity 、 Seebeck coefficient
摘要: A hydrogen sensor working at room temperature with high sensitivity, good selectivity and simple structure was presented in this paper. Four couples of P- N-type bismuth–telluride films were connected series to serve as the feedback part a Seebeck coefficient 1.1 mV/K. platinum catalyst deposited on γ-Al2O3 acting sensitive part. Linear relationships between output voltage concentration well flow rate found when higher than 0.5 vol.%. As for 3 vol.% H2/Air gas 100 ml/min temperature, response recovery times about 30 55 s, respectively, error repeatability less 0.3%.
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