With the emergence of hydrogen economy worldwide and the increase of safety problems caused by the highly flammable and explosive characteristics of hydrogen (H₂), it is urgent to develop the portable sensors that can sensitively and quickly detect H₂ leaks. In this work, the H₂ sensing characteristics of Pd/SnS₂/SnO₂ nanocomposites synthesized via hydrothermal route as well as impregnation route were systematically investigated for the first time. The influence of different SnS₂ and Pd loading on the H₂ sensing performances of SnO₂ nanoparticles was revealed by varying the addition levels of thiourea and palladium chloride. The H₂ sensing experimental results demonstrated that SnS₂ and Pd modification can greatly enhance the sensing capabilities of SnO₂, where 1.0 at% Pd/SnS₂/SnO₂ sensor exhibited high response (95) and rapid response/recovery time (1/9 s) to 500 ppm H₂ at 300 ℃, thus outperforming the current reported sensing performances of SnO₂-based H₂ sensors. The superior sensing characteristics of Pd/SnS₂/SnO₂ were attributed to the simultaneous synergistic effect of the three components. This study will supply a rational strategy for designing high sensitive and rapid response H₂ sensors.

_{随着世界范围内氢经济的兴起以及氢（H 2} ）的高度易燃易爆特性带来的安全问题的增加，迫切需要开发能够灵敏、快速地检测H ₂泄漏的便携式传感器。本工作首次系统研究了水热法和浸渍法合成的Pd/SnS ₂ /SnO _{2纳米复合材料的H 2传感特性。}通过改变硫脲和氯化钯的添加水平揭示了不同的SnS _{2和Pd负载对SnO 2}纳米颗粒的H ₂传感性能的影响。H₂传感实验结果表明，SnS ₂和 Pd 改性可以大大提高 SnO ₂的传感能力，其中 1.0 at% Pd/SnS ₂ /SnO ₂传感器表现出高响应 (95) 和快速响应/恢复时间 (1/9 s )在 300 ℃ 下达到 500 ppm H _{2 ，因此优于目前报道的基于 SnO 2}的 H ₂传感器的传感性能。_{Pd/SnS 2} /SnO ₂优异的传感特性归因于三种成分的同时协同作用。本研究将为设计高灵敏度和快速响应的 H _{2提供合理的策略}传感器。