| Abstract Scope |
Two dimensional ferroelectric materials display a switchable spontaneous electric polarization in one or few monolayers. Interestingly, switching the polarization can change the surface properties, providing a route to overcoming the Sabatier principle. We first show that the surface of the ferroelectric MXene Y2CO2 with a vacancy can preferentially adsorb CO2 or CO depending on if the surface is poled up or poled down. We then extend that by investigating the reduction of CO2 to CO, formic acid, and methane, and find that the stability of intermediates and final products can be also changed by switching the direction of the polarization. Second, we interface singe transition metal atom and dimer doped graphene with ferroelectric In2Se3; by switching the In2Se3 layer, the adsorptive properties of the metal-doped graphene layer can also be altered, leading to selective adsorption and catalysis. This is a unique route to preferential adsorption and product selectivity in catalysis. |