MXenes and MBenes are two-dimensional materials with potential to revolutionize carbon capture and storage (CCS). MXenes have higher CO₂ adsorption capacity, porosity, and easier production, while MBenes are more stable in humid environments and have higher oxidation resistance and thermal conductivity. Both materials show superior CO₂ adsorption performance compared to conventional CCS materials. MXenes have a slight edge in adsorption capacity and selectivity, while MBenes are better for humid, hot, and corrosive CO₂ streams. MXenes and MBenes have tunable properties, high surface area, and good stability, making them suitable for various CCS applications. Their ability to selectively adsorb CO₂ compared to N₂ and O₂ is due to pore size, surface chemistry, and electrical conductivity. The optimal number of layers for MXenes/MBenes is around 3–5, with interlayer spacing affecting performance. Oxygen-terminated MXenes show the highest CO₂ adsorption capacity. MXenes and MBenes are promising for CCS, but challenges remain in scalability, cost, and durability. MXenes are more expensive than conventional materials like zeolites and activated carbons, but they are easier to produce. MBenes are more stable in humid environments. The best material depends on the application: MXenes for high adsorption capacity and diffusion efficiency, MBenes for stability in humid environments. MXenes and MBenes can be used in post-combustion, pre-combustion, and direct air capture applications. They show high CO₂ capture efficiency and can be regenerated. However, more research is needed to optimize production, cost, and scalability. Despite challenges, these materials hold great potential for CCS and sustainable CO₂ capture technologies.MXenes and MBenes are two-dimensional materials with potential to revolutionize carbon capture and storage (CCS). MXenes have higher CO₂ adsorption capacity, porosity, and easier production, while MBenes are more stable in humid environments and have higher oxidation resistance and thermal conductivity. Both materials show superior CO₂ adsorption performance compared to conventional CCS materials. MXenes have a slight edge in adsorption capacity and selectivity, while MBenes are better for humid, hot, and corrosive CO₂ streams. MXenes and MBenes have tunable properties, high surface area, and good stability, making them suitable for various CCS applications. Their ability to selectively adsorb CO₂ compared to N₂ and O₂ is due to pore size, surface chemistry, and electrical conductivity. The optimal number of layers for MXenes/MBenes is around 3–5, with interlayer spacing affecting performance. Oxygen-terminated MXenes show the highest CO₂ adsorption capacity. MXenes and MBenes are promising for CCS, but challenges remain in scalability, cost, and durability. MXenes are more expensive than conventional materials like zeolites and activated carbons, but they are easier to produce. MBenes are more stable in humid environments. The best material depends on the application: MXenes for high adsorption capacity and diffusion efficiency, MBenes for stability in humid environments. MXenes and MBenes can be used in post-combustion, pre-combustion, and direct air capture applications. They show high CO₂ capture efficiency and can be regenerated. However, more research is needed to optimize production, cost, and scalability. Despite challenges, these materials hold great potential for CCS and sustainable CO₂ capture technologies.