Half-cell reaction

E˚ Vs. SHE

CO₂ + 8H⁺ + 8e⁻ → CH₄ + 2H₂O

+0.17

CO₂ + 6H⁺ + 6e⁻ → CH₃oh + H₂O

+0.131

CO₂ + 4H⁺ + 4e⁻ → CH₂o + H₂O

−0.028

CO₂ + 2H⁺ + 2e⁻ → Co + H₂O

−0.10

CO₂ + 2H⁺ + 2e⁻ → hCOOH

−0.11