Metal-Organic-Framework-Mediated Nitrogen-Doped Carbon for CO2 Electrochemical Reduction
R. Wang (ChemE/Catalysis Engineering)
X. Sun (ChemE/Catalysis Engineering)
Samy Ould-Chikh (King Abdullah University of Science and Technology)
Dmitrii Osadchii (ChemE/Catalysis Engineering)
F. Bai (ChemE/Catalysis Engineering, TU Delft - Applied Sciences)
F Kapteijn (ChemE/Catalysis Engineering)
Jorge Gascon (ChemE/Catalysis Engineering, King Abdullah University of Science and Technology)
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Abstract
A nitrogen-doped carbon was synthesized through the pyrolysis of the well-known metal-organic framework ZIF-8, followed by a subsequent acid treatment, and has been applied as a catalyst in the electrochemical reduction of carbon dioxide. The resulting electrode shows Faradaic efficiencies to carbon monoxide as high as ∼78%, with hydrogen being the only byproduct. The pyrolysis temperature determines the amount and the accessibility of N species in the carbon electrode, in which pyridinic-N and quaternary-N species play key roles in the selective formation of carbon monoxide.