Single atom catalysts (SACs) have garnered significant attention in the field of catalysis over the past decade due to their exceptional atom utilization efficiency and distinct physical and chemical properties. For the semiconductor-based electrical gas sensor, the core is the catalysis process of target gas molecules on the sensitive materials. In this context, the SACs offer great potential for highly sensitive and selective gas sensing, however, only some of the bubbles come to the surface. To facilitate practical applications, we present a comprehensive review of the preparation strategies for SACs, with a focus on overcoming the challenges of aggregation and low loading. Extensive research efforts have been devoted to investigating the gas sensing mechanism, exploring sensitive materials, optimizing device structures, and refining signal post-processing techniques. Finally, the challenges and future perspectives on the SACs based gas sensing are presented.

中文翻译：

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高灵敏气敏单原子催化剂的制备

单原子催化剂（SAC）由于其卓越的原子利用效率和独特的物理和化学性质，在过去十年中在催化领域引起了极大的关注。对于基于半导体的电学气体传感器来说，其核心是目标气体分子对敏感材料的催化过程。在这种情况下，SAC 为高灵敏度和选择性气体传感提供了巨大的潜力，然而，只有部分气泡浮出表面。为了促进实际应用，我们对 SAC 的制备策略进行了全面的回顾，重点是克服聚集和低负载的挑战。广泛的研究工作致力于研究气体传感机制、探索敏感材料、优化器件结构和完善信号后处理技术。最后，提出了基于 SAC 的气体传感的挑战和未来前景。