Fig. 2.

The distribution of surface intermediates in the pathways under steady state. a The amount of surface intermediates leading to ¹²CH₄ $\left({\overline{N}}_{\mathrm{I}CH}\right)$ and ¹²CO $\left({\overline{N}}_{\mathrm{I}CO}\right)$ on the catalyst (41 mg) during CO₂ reduction at 533–573 K. b Schematic representation of the proportion of surface coverage of HCOO^∗ that is eventually converted to CH₄ and CO with increasing temperature concluded from a