Graphene Decorated With Mo₃S₇ Clusters for Sensing CO₂

Abstract This paper reports for the first time a gas‐sensitive nanohybrid based on trinuclear molybdenum sulfido clusters ((Bu₄N)₂[Mo₃(μ₃‐S)(μ‐S₂)₃Cl₆] (Mo₃S₇)) supported on graphene flakes (Mo₃S₇@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 (H₂), carbon dioxide (CO₂), carbon monoxide (CO), and benzene. Particularly, the Mo₃S₇@Graphene hybrid shows an outstanding sensing performance toward CO₂. 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.