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Hydrogen sulfide (H2S) detection with high selectivity and fast response is of great significance due to its strong toxicity both to the environment and humans. In this paper, the design, fabrication, and characterization of a hydrogen sulfide gas sensors with a good temperature uniformity, highly selectivity and fast response is presented. Response tests show a fast response time of 100ppm H2S with 2s at 350 °C operating temperature, and the limit of detection (LOD) is 134 parts-per-billion (ppb) in ambient conditions. Selectivity tests indicated that these sensors have poor respond to interfering analytes such as hydrogen, methane, carbon monoxide, ammonia and sulfur dioxide and the selectivity coefficients of H2S are greater than 88. Silver-based hydrogen sulfide sensor offers advantages such as remarkable potential for mass production due to their ease of manufacturing, good performance, and significant selectivity.
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