Reasonably constructing an atomic interface is pronouncedly essential for surface-related gas-sensing reaction. Herein, we present an ingenious feedback-regulation system by changing the interactional mode between single Pt atoms and adjacent S species for high-efficiency SO₂ sensing. We found that the single Pt sites on the MoS₂ surface can induce easier volatilization of adjacent S species to activate the whole inert S plane. Reversely, the activated S species can provide a feedback role in tailoring the antibonding-orbital electronic occupancy state of Pt atoms, thus creating a combined system involving S vacancy-assisted single Pt sites (Pt-Vs) to synergistically improve the adsorption ability of SO₂ gas molecules. Furthermore, in situ Raman, ex situ X-ray photoelectron spectroscopy testing and density functional theory analysis demonstrate the intact feedback-regulation system can expand the electron transfer path from single Pt sites to whole Pt-MoS₂ supports in SO₂ gas atmosphere. Equipped with wireless-sensing modules, the final Pt₁-MoS₂-def sensors array can further realize real-time monitoring of SO₂ levels and cloud-data storage for plant growth. Such a fundamental understanding of the intrinsic link between atomic interface and sensing mechanism is thus expected to broaden the rational design of highly effective gas sensors.

合理构建原子界面对于表面相关的气敏反应至关重要。在此，我们通过改变单个 Pt 原子与相邻 S 物种之间的相互作用模式，提出了一种巧妙的反馈调节系统，以实现高效 SO ₂传感。我们发现MoS ₂表面上的单个Pt位点可以诱导相邻S物质更容易挥发，从而激活整个惰性S平面。相反，活化的S物种可以在调整Pt原子的反键轨道电子占据状态方面提供反馈作用，从而创建一个涉及S空位辅助的单Pt位点（Pt-Vs）的组合系统，以协同提高SO的吸附能力_2个气体分子。此外，原位拉曼、异位X射线光电子能谱测试和密度泛函理论分析表明，完整的反馈调节系统可以将电子转移路径从单个Pt位点扩展到SO 2 气氛中的整个Pt- _MoS 2载体_{。最终的Pt 1} -MoS ₂ -def传感器阵列配备无线传感模块，可以进一步实现SO ₂水平的实时监测和植物生长的云数据存储。因此，对原子界面和传感机制之间内在联系的这种基本理解有望拓宽高效气体传感器的合理设计。