The value of conversion of CO₂ to chemicals, clean fuels, and carbon materials has gradually been recognized as climate change and global warming are increasingly evident. Many research efforts are motivated to develop advanced nanocatalysts with high efficiency to reduce atmospheric CO₂ concentration. In this chapter, we review the recent updates on thermal catalytic technologies for CO₂ reduction in terms of net CO₂ reduction using two-dimensional (2D) nanomaterials. Moreover, CO₂ reduction through the thermochemical process is a state-of-the-art strategy for the transformation of CO₂ into fuels^1,2  and valuable chemical feedstocks.^3–6  Based on this new presupposition, the thin layer 2D nanomaterials have received much attention owing to their fascinating atomic-scale thickness, good mechanical property, versatile electronic and optical attributes,⁷  and unique physicochemical properties. Their distinguished properties could make them excellent alternatives for catalytic thermal conversion of CO₂.