Unraveling the rate-determining step of C₂₊ products during electrochemical CO reduction.

ABSTRACT: The electrochemical reduction of CO has drawn a large amount of attention due to its potential to produce sustainable fuels and chemicals by using renewable energy. However, the reaction's mechanism is not yet well understood. A major debate is whether the rate-determining step for the generation of multi-carbon products is C-C coupling or CO hydrogenation. This paper conducts an experimental analysis of the rate-determining step, exploring pH dependency, kinetic isotope effects, and the impact of CO partial pressure on multi-carbon product activity. Results reveal constant multi-carbon product activity with pH or electrolyte deuteration changes, and CO partial pressure data aligns with the theoretical formula derived from *CO-*CO coupling as the rate-determining step. These findings estab

SUBMITTER: Deng W 

PROVIDER: S-EPMC10828390 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature