摘要
采用室温固相合成法制备了不同含量的MnO_2/Al_2O_3系列敏感材料,试验研究了MnO_2催化剂含量和焙烧温度对甲烷气体催化活性的影响,并考察了甲烷传感器灵敏度大小及敏感材料的长期稳定性。结果表明:该法制备的MnO_2/Al_2O_3系列敏感材料具有较好的低温催化活性,且随MnO_2含量的增加,催化剂的低温活性增强。综合考虑敏感材料的催化活性、灵敏度和稳定性,400℃焙烧制备的MnO_2含量为30%的MnO_2/Al_2O_3敏感材料对甲烷低温催化燃烧有较好的催化性能。
A series of MnO2/Al2O3 sensitive materials were prepared via solid-state reaction. The Influence of MnO2 catalytic contents and baked temperature on catalytic performance were studied. In addition, the size of sensitivity and the long-term stability of sensitive materials were investigated. The results show that the sensitive materials with higher MnO2 contents have higher catalytic activity in low temperature. Considering catalytic activity, sensitivity and the long-term stability of sensitive materials, the 30% MnO2/Al2O3 baked at 400 ℃is found to be the best sensitive materials for methane low temperature catalytic reaction.
出处
《仪表技术与传感器》
CSCD
北大核心
2009年第B11期107-109,152,共4页
Instrument Technique and Sensor
关键词
MNO2
敏感材料
室温固相反应
催化活性
MnO2
sensitive materials
solid-state reaction
catalytic activity
