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Open Access Publications from the University of California

Iron Porphyrins Embedded into a Supramolecular Porous Organic Cage for Electrochemical CO2Reduction in Water

  • Author(s): Smith, PT
  • Benke, BP
  • Cao, Z
  • Kim, Y
  • Nichols, EM
  • Kim, K
  • Chang, CJ
  • et al.

© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim A porous organic cage composed of six iron tetraphenylporphyrins was used as a supramolecular catalyst for electrochemical CO2-to-CO conversion. This strategy enhances active site exposure and substrate diffusion relative to the monomeric catalyst, resulting in CO generation with near-quantitative Faradaic efficiency in pH 7.3 water, with activities reaching 55 250 turnovers. These results provide a starting point for the design of supramolecular catalysts that can exploit the properties of the surrounding matrix yet retain the tunability of the original molecular unit.

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