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)
2002
Key concepts
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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