In this work, we introduced a structure of Pd coated SnO₂ nanofiber rods (NFRs) prepared by electrospinning and magnet sputtering. Pd was first deposited on the obtained nanofibers as a catalyst and then fully dispersed during the resulting of SnO₂ to improve the hydrogen response. The gas sensing tests showed the palladium enhanced the hydrogen response at low temperature (160 °C). When the hydrogen gas concentration was 100 ppm, the limit of detection (LOD) of sensor was as low as 0.25 ppm and the response time was as short as 4 s. Moreover, Pd coated SnO₂ also had excellent hydrogen selectivity and repeatability. The gas sensor was suitable for the detection of hydrogen in low-temperature environment. This work provided a new method for the low temperature hydrogen gas sensor with a fast response and low LOD.

在这项工作中，我们介绍了通过静电纺丝和磁体溅射制备的Pd包覆SnO ₂纳米纤维棒（NFR）的结构。Pd首先作为催化剂沉积在获得的纳米纤维上，然后在生成SnO _2的过程中完全分散，以改善氢响应。气敏测试表明，钯增强了低温（160°C）下的氢响应。氢气浓度为100 ppm时，传感器的检出限（LOD）低至0.25 ppm，响应时间短至4 s。此外，Pd包覆的SnO ₂还具有出色的氢选择性和可重复性。该气体传感器适用于在低温环境中检测氢气。这项工作为响应速度快，LOD较低的低温氢气传感器提供了一种新方法。