Fig. 3: Selectivity for CO2RR vs HER.

Gibbs free energy changes (ΔG) of initial protonation of CO2RR vs. HER on TM@In2Se3 (TM = Ni, Pd, Rh, Zr, Nb and Re). Data points in the purple region denote higher selectivity toward CO2RR, while those in the blue region toward HER. Black and red symbols stand for ΔG(OCOH*) vs ΔG(H*) and ΔG(OCHO*) vs ΔG(H*), respectively.