The Importance of Cannizzaro-Type Reactions during Electrocatalytic Reduction of Carbon Dioxide.

ABSTRACT: A seemingly catalytically inactive electrode, boron-doped diamond (BDD), is found to be active for CO₂ and CO reduction to formaldehyde and even methane. At very cathodic potentials, formic acid and methanol are formed as well. However, these products are the result of base-catalyzed Cannizzaro-type disproportionation reactions. A local alkaline environment near the electrode surface, caused by the hydrogen evolution reaction, initiates aldehyde disproportionation promoted by hydroxide ions, which leads to the formation of the corresponding carboxylic acid and alcohol. This phenomenon is strongly influenced by the electrolyte pH and buffer capacity and not limited to BDD or formaldehyde, but can be generalized to different electrode materials and to C₂ and C₃

SUBMITTER: Birdja YY 

PROVIDER: S-EPMC5330657 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature