Royal Society of Chemistry

Table 1.1

CO₂ reduction to various products at different potentials²⁶

Reactants	Products	Potential (V)
CO₂ + 2H⁺ + 2e⁻	HCOOH	−0.20
CO₂ + 2H⁺ + 2e⁻	CO + H₂O	−0.11
CO₂ + 4H⁺ + 4e⁻	HCHO + H₂O	−0.07
CO₂ + 6H⁺ + 6e	CH₃OH + H₂O	+0.03
CO₂ + 8H⁺ + 8e⁻	CH₄ + 2H₂O	+0.17

Reactants	Products	Potential (V)
CO₂ + 2H⁺ + 2e⁻	HCOOH	−0.20
CO₂ + 2H⁺ + 2e⁻	CO + H₂O	−0.11
CO₂ + 4H⁺ + 4e⁻	HCHO + H₂O	−0.07
CO₂ + 6H⁺ + 6e	CH₃OH + H₂O	+0.03
CO₂ + 8H⁺ + 8e⁻	CH₄ + 2H₂O	+0.17