Theoretical and computational study of heterogeneously catalyzed processes using density functional theory-based calculations complemented with multiscale analysis using microkinetic and kinetic Monte Carlo simulations. The systems of interest include bulk carbides either as catalysts or supports and increasingly focus on two-dimensional (MXenes) carbides/nitrides as catalysts for the capture and transformation of CO2 into other useful chemicals (CO, CH4, CH3OH, and also C2 compounds such as ethanol). Other systems of interest are metal surfaces and nanoparticles, including bimetallic systems.