Kinetic studies of the electrolytic reduction of carbon dioxide on the mercury electrode

The reduction of CO2 to HCOOH has been studied for the Hg electrode in neutral and acidic aqueous solutions in the potential range between −0.8 and −1.9 V(sce)

W. Paik

2002

Scholarcy highlights

  • The reduction of CO2 to HCOOH has been studied for the Hg electrode in neutral and acidic aqueous solutions in the potential range between −0.8 and −1.9 V(sce)
  • In the neutral pH range all the current is consumed in the production of formic acid, while in acid solutions both HCOOH and H2 are produced
  • In neutral solutions the mechanism may be described by a direct reduction of CO2 in which two consecutive charge-transfer steps occur
  • The H atoms formed react in a branching mechanism either with H3 O+ ions and electrons to yield H2, or with CO2 to yield eventually HCOOH

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