【作者】：Han Zhang, Tiegang Zhong, Ruize Sun, Xishuang Liang* , Geyu Lu*
【题目】：Sub-ppm H2S sensor based on NASICON and CoCr2-xMnxO4 sensing electrode
【关键词】：SPINEL-TYPE, STABILIZED ZIRCONIA,THIN-FILM,COMBINING NASICON,OXIDE,SNO2,YSZ
【版面信息】：RSC Advances 4 (2014) 55334-55340
摘要:
Solid electrochemical sensors based on sodium super ionic conductor (NASICON) and spinel-type oxide CoCr2-xMnxO4(x = 0, 1, 1.2, 1.4 and 2) sensing electrode were designed for sub-ppm H2S detection. In comparison with other spinel-type oxides, the sensor using CoCr1.2Mn0.8O4showed the maximum response of 178 mV for 10 ppm H2S at 250℃. The sensor displayed good stability for H2S during the testing period. Moreover, the sensor exhibited excellent selectivity toward H2S against the other interference gases, such as SO2, NO2, CH4, CO, C2H4, H2and NH3. A sensing mechanism related to the mixed potential was proposed for the sensor based on NASICON and oxide electrodes. The effect of sintering temperature had also been investigated.
