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Dr. Duraisamy Saravanakumar, Dr. Jieun Song, Nayoung Jung, Harishchandra Jirimali and Prof. Dr. Woonsup Shin Reduction of CO2 to CO at Low Overpotential in Neutral Aqueous Solution by a Ni(cyclam) Complex Attached to Poly(allylamine) ChemSusChem 5

Article first published online: 12 MAR 2012 | DOI: 10.1002/cssc.201100481

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Less is more: Nickel cyclam complexes are known as efficient catalysts for the electrochemical reduction of CO2 to CO, despite having overvoltages of more than 0.6 V. Incorporating [Ni(cyclam)]2+ into poly(allylamine) through axial coordination of pyridine enables the electrochemical reduction of CO2 to CO near the thermodynamic potential of −0.78 V (vs. Ag/AgCl) at pH 8 with a current efficiency of 90 %.

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