This theoretical work reported that four MXenes (i.e. M2C (M =Ti, V, Nb, Mo)) are very reactive and are attractive for catalytic applications. The O-functionalized MXenes are less reactive but more selective to particular gas species than the pristine MXenes. Our findings proposed the feasibility of using these O-MXenes in gas-separation, -capture, -sensing and catalytic applications. Check out the paper here.