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A Comparison Between 2D and 3D Cobalt-organic Framework As Catalysts for Electrochemical CO Reduction

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Journal Heliyon
Specialty Social Sciences
Date 2024 Feb 20
PMID 38375310
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Abstract

Electrocatalytic CO reduction, as an effective way to reduce the CO concentration, has gained attention. In this study, we prepared ZIF-67 nanoparticles and nanosheets and investigated them as electrocatalysts for CO 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 CO 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 Mg ions in solution causes more facile CO reduction, especially for ZIF-67 nanosheets.

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