Bimetallic nanoparticles (BM-NPs) have attracted much attention in catalysis, sensing, and electronics as a result of their ultra-high activity for surface reactions. For reliable utilization of BM-NPs in various applications, robust synthetic methods for the creation of non-aggregated functional BM-NPs with diameters less than a few nanometers are needed. Herein, we present functional assemblies of ultra-small BM-NPs produced within high-stability porous ion-exchange polymers. Specifically, PdPt NPs can be readily produced with precision dimensional control down to 1 nm. These PdPt NPs with porous polymers display superior hydrogen (H₂)-sensing properties at room temperature in air. We achieve an ultra-low limit of detection (H₂ 0.4 ppm), thereby confirming the outstanding sensing performance of the PdPt NPs. We further demonstrate a wireless H₂-sensing system by combining porous polymer-templated PdPt NPs with a radio-frequency identification (RFID) system, which enables the wireless detection of H₂ in a sealed gas head space.

双金属纳米颗粒（BM-NPs）具有超高的表面反应活性，因此在催化，传感和电子领域引起了广泛关注。为了在各种应用中可靠地利用BM-NP，需要可靠的合成方法来创建直径小于几纳米的非聚集功能性BM-NP。在这里，我们介绍了在高稳定性多孔离子交换聚合物中生产的超小型BM-NP的功能组件。具体而言，可以通过低至1 nm的精确尺寸控制轻松生产PdPt NP。这些具有多孔聚合物的PdPt NP在室温下的空气中显示出优异的氢（H ₂）传感性能。我们实现了超低检测限（H ₂0.4 ppm），从而确认了PdPt NP出色的感测性能。我们通过结合多孔聚合物模板化的PdPt NP与射频识别（RFID）系统，进一步展示了一种无线H ₂传感系统，该系统能够在密封气顶空间中无线检测H ₂。