以NASICON(钠超离子导体)固体电解质为离子导电层,Co_2O_3为敏感电极研究了用于检测甲醇气体的电化学传感器。结果表明,器件对体积浓度为(100~1000)×10~(-6)(体积分数,下同)内的甲醇气体具有较好的敏感特性。在300℃时,器件对浓度为120×10~(-6)的甲醇的灵敏度为-145 mV,对浓度为(100,300,500)×10~(-6)的甲醇的响应时间为30,22,10s,恢复时间为50,75,105 s。并且器件对甲醇具有较高的选择性和良好的短期稳定性。 An electrochemical sensor for the detection of methanol gas was studied with NASICON (sodium super ionic conductor) solid electrolyte as the ion conducting layer and Co_2O_3 as the sensing electrode. The results show that the device has good sensitivity to methanol gas with a volume concentration of (100-1000) × 10 -6 (volume fraction, the same below). At 300 ℃, the sensitivity of the device to methanol at a concentration of 120 × 10 -6 was -145 mV and the response time to methanol at a concentration of (100,300,500) × 10 -6 was 30, 22 and 10 s , Recovery time is 50,75,105 s. And the device has high selectivity to methanol and good short-term stability.