Graphene Decorated With Mo₃S₇ Clusters for Sensing CO₂

This paper reports for the first time a gas‐sensitive nanohybrid based on trinuclear molybdenum sulfido clusters ((Bu 4 N) 2 [Mo 3 (μ 3 ‐S)(μ‐S 2 ) 3 Cl 6 ] (Mo 3 S 7 )) supported on graphene flakes (Mo 3 S 7 @Graphene). The nanomaterial, once implemented in a chemoresistive device, changes its electrical resistivity when exposed, at room temperature (RT), to toxic and harmful gases, such as hydrogen (H 2 ), carbon dioxide (CO 2 ), carbon monoxide (CO), and benzene. Particularly, the Mo 3 S 7 @Graphene hybrid shows an outstanding sensing performance toward CO 2 . Theoretical calculations provide a better understanding of the plausible gas sensing mechanisms. These findings open the door for a new generation of molybdenum sulfido cluster‐based sensors in which electronic interrogation can be implemented, advancing toward the realization of highly sensitive gas sensing.