NO sensitivity of perovskite-type electrode materials La_0.6Ca_0.4B′_1−xB″_xO_3±δ (B′ = Mn, Cr; B″ = Ni, Fe, Co; x = 0, 0.1, …, 0.6) in mixed potential sensors

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• 作者：Daniela Franke^a ; ^{daniela.franke@tu-dresden.de" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Jens Zosel^bAuthor Vitae ; Ulrich Guth^a ; ^bAuthor Vitae
• 关键词：Perovskites ; Potentiometric/impedance sensor ; Solid-state NO sensor ; Catalytic activity
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：223
• 期：Complete
• 页码：723-729
• 全文大小：1459 K

文摘

Perovskite-type electrode materials of the compositions La_0.6Ca_0.4B′_1−xB″_xO_3±δ (B = Mn, Cr; B″ = Ni, Co, Fe; x = 0, …, 0.6) were investigated with regard to their NO sensitivity and the cross-sensitivity to NO₂ and propylene in a potentiometric solid electrolyte measuring setup. The highest NO sensitivity was found for nickel and iron manganites with x = 0.2 and 0.3. Dependencies on the NO gas concentration were found using impedance spectroscopy. For some materials, the catalytic conversion of NO, NO₂, methane and propene was determined by thermal investigation in the temperature range of 25–800 °C.