In this work, we applied PdRu bimetallic to the detection of trimethylamine for the first time. PdRu bimetallic nanoparticles with good dispersibility and a particle size of about 8 nm were prepared by the polyol synthesis method and successfully modified on SnO₂ nanoclusters. The structure and morphology of the synthesized materials were characterized, and their gas sensing properties were tested in detail. Among them, 0.2 wt% PdRu-SnO₂ showed satisfied selectivity to trimethylamine at 230 ℃, its response (100 ppm 78.3) was 14.5 times higher than that of pure SnO₂ (100 ppm 5.4), with a response/recovery time of 10 s/81 s, respectively. The main reason for this phenomenon is that the excellent catalytic performance of PdRu bimetallic nanoparticles significantly increased the oxygen ion concentration on the surface of SnO₂, and besides, the formation of a Schottky barrier between PdRu and SnO₂ had a positive effect on the sensitivity. The experimental results showed that PdRu bimetallic nanoparticles can sensitize SnO₂, which can expand a new idea for the gas detection of trimethylamine.

在这项工作中，我们首次将 PdRu 双金属应用于三甲胺的检测。采用多元醇合成法制备了分散性好、粒径约8 nm的PdRu双金属纳米粒子，并成功修饰在SnO ₂纳米团簇上。对合成材料的结构和形貌进行了表征，并对其气敏性能进行了详细测试。其中，0.2 wt% PdRu-SnO _{2在230 ℃对三甲胺表现出满意的选择性，其响应（100 ppm 78.3）是纯SnO 2}的14.5倍。(100 ppm 5.4)，响应/恢复时间分别为 10 s/81 s。造成这种现象的主要原因是PdRu双金属纳米粒子优异的催化性能显着增加了SnO _{2表面的氧离子浓度，此外，PdRu和SnO 2}之间形成肖特基势垒对灵敏度产生了积极影响。 . 实验结果表明，PdRu双金属纳米粒子对SnO ₂具有敏化作用，为三甲胺气体检测开辟了新思路。