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首页> 外文期刊>Sensors Journal, IEEE >Room Temperature Amperometric Ammonia Sensor Based on Pt and Pt–Ir Porous Ceramic Electrodes
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Room Temperature Amperometric Ammonia Sensor Based on Pt and Pt–Ir Porous Ceramic Electrodes

机译:基于Pt和Pt–Ir多孔陶瓷电极的室温电流氨传感器

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摘要

The amperometric ammonia sensors based on Pt (electroplating) and Pt–Ir (electroplating)/Pt(sputtering)/porous ceramic plate (Pt(E)/Pt(S)/PCP and Pt–Ir(E)/Pt(S)/PCP) electrodes have been fabricated to detect the concentration of ammonia in 1.0 M KOH aqueous solution. The morphologies, crystallinities, and compositions of the sensing electrodes were analyzed by scanning electron microscope, X-ray diffraction, and electron probe micro-analyzer, respectively. The analysis results indicated that both the deposited Pt and Pt–Ir layers exhibited amorphous type. The sensitivities of the amperometric ammonia sensor for ppm NH were obtained to be 8.31 ± 0.03 and ppm cm, respectively, when the Pt(E)/Pt(S)/PCP and Pt–Ir(E)/Pt(S)/PCP were used as the sensor electrodes, respectively. While the Pt(E)/Pt(S)/CP and Pt-Ir(E)/Pt(S)/CP electrodes were reactivated at −0.8 V for detecting every level of NH, the sensitivities of the amperometric NH sensor would separately increase by 32.5 ± 0.12% and 26.9 ± 0.09%.
机译:基于Pt(电镀)和Pt–Ir(电镀)/ Pt(溅射)/多孔陶瓷板(Pt(E)/ Pt(S)/ PCP和Pt–Ir(E)/ Pt(S)的安培氨传感器/ PCP)电极已经制造出来,可以检测1.0 M KOH水溶液中氨的浓度。分别通过扫描电子显微镜,X射线衍射和电子探针显微分析仪分析感测电极的形态,结晶度和组成。分析结果表明,沉积的Pt和Pt–Ir层均表现出非晶型。当Pt(E)/ Pt(S)/ PCP和Pt–Ir(E)/ Pt(S)/ PCP时,安培氨传感器对ppm NH的灵敏度分别为8.31±0.03和ppm cm。分别用作传感器电极。当在-0.8 V下重新激活Pt(E)/ Pt(S)/ CP和Pt-Ir(E)/ Pt(S)/ CP电极以检测所有水平的NH时,电流型NH传感器的灵敏度将分别增加了32.5±0.12%和26.9±0.09%。

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