A comparison between 2D and 3D cobalt-organic framework as catalysts for electrochemical CO₂ reduction.

ABSTRACT: Electrocatalytic CO₂ reduction, as an effective way to reduce the CO₂ concentration, has gained attention. In this study, we prepared ZIF-67 nanoparticles and nanosheets and investigated them as electrocatalysts for CO₂ reduction. It was found that ZIF-67 nanosheets, because of their two-dimensional morphologies, provide more under-coordinated cobalt nodes and have lower overpotentials for both hydrogen evolution and CO₂ reduction reactions. Also, the rate-determining step for hydrogen evolution changes from Volmer for ZIF-67 nanoparticles to Hyrovsky for ZIF-67 nanosheets. Also, the presence of Mg²⁺ ions in solution causes more facile CO₂ reduction, especially for ZIF-67 nanosheets.

SUBMITTER: Barekati NS 

PROVIDER: S-EPMC10875588 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature