4.7 Article

Cobalt porphyrins as homogeneous catalysts for water oxidation

Journal

CHEMICAL COMMUNICATIONS
Volume 49, Issue 56, Pages 6325-6327

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cc43031f

Keywords

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Funding

  1. Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan [24350029, 2107, 24108732, 2406, 24107004]
  2. International Institute for Carbon Neutral Energy Research (WPI-I2CNER)
  3. World Premier International Research Center Initiative (WPI), MEXT, Japan
  4. Grants-in-Aid for Scientific Research [24107004, 24108732] Funding Source: KAKEN

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Three water-soluble cobalt porphyrins have been investigated as water oxidation catalysts via photo-initiation using Ru-II(bpy)(3)(2+)/Na2S2O8. The pH dependence of the turnover frequency revealed maximum activity at pH 11. Based on the second order dependence on catalyst concentration for the rate of water oxidation, we suggest a bimolecular radical coupling process as the rate determining step.

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