Figure 3.

Reaction network for CO₂ hydrogenation into C1 species, with possible products comprising gaseous CO, CH₄, CH₃OH, HCOOH, and CH₂O. The black, blue, and red lines signify the adsorption and desorption processes, hydrogenation and dehydrogenation processes, and reversible decomposition processes, respectively. Species appearing in more than one mechanistic pathway are identified with colored labels for clarity (e.g., adsorbed HCOOH is denoted by text in green). All species are adsorbed on the Rh(111) surface, except for those marked with (g), which indicates gaseous entities.