Abstract
While it is well recognized that mass transfer is an important factor in electrochemical reactions, the influence of mass transfer, especially of the convection on the electrochemical CO 2 reduction has not been investigated. In this study, we focused on the influence of convection in a flow cell system using a boron-doped diamond electrode. The results clearly showed that convection improved the product selectivity and electrode potentials in CO 2 reduction. It suggested that convection controls CO 2 mass transfer in a flow cell system and influences the reactivity of electrochemical CO 2 reduction. • Electrochemical CO 2 reduction using a boron-doped diamond electrode was performed. • Frequencies of pressure changes in electrolytes were controlled. • The higher frequency accelerated convection in the flow cell. • Accelerated convection promoted electrochemical CO 2 reduction. • Convection influenced the mass transport of CO 2 to the electrode.
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