Preparation of Single Atom Catalysts for High Sensitive Gas Sensing

Single atom catalysts (SACs) have received enormous attention in the field of catalysis in the last decade due to their maximum atom utilization as well as unique 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 scenario, the SACs would be used for highly sensitive and selective gas sensing, however, only some of bubbles come to the surface. To realize its practical applications, the preparation strategies for SACs are reviewed systematically. The aggregation and low loading of SACs are still the main challenges. Following, the interaction between the SACs and the target gas molecules and its supports is unrevealed to explain the improvement of sensing performances. Furthermore, the typical applications of SACs in the different gases sensing are highlighted, revealing its superiority of high sensitivity and selectivity. Finally, the challenges and future perspectives on the SACs based gas sensing are presented.