Iron polypyridyl complexes have recently been reported to electrocatalytically reduce protons to hydrogen gas at -1.57 V versus Fc(+)/Fc. A new iron catalyst with a nitro-functionalized polypyridyl ligand has been synthesized and found to be active for proton reduction. Interestingly, catalysis occurs at -1.18 V versus Fc(+)/Fc for the nitro-functionalized complex, resulting in an overpotential of 300 mV. Additionally, the complex is active with a turnover frequency of 550 s(-1). Catalysis is also observed in the presence of water with a 12% enhancement in activity. (C) 2015 Elsevier Ltd. All rights reserved.
Hartley, C. L., DiRisio, R. J., Chang, T. Y., Zhang, W., & McNamara, W. R. (2016). Electrocatalytic hydrogen evolution by an iron complex containing a nitro-functionalized polypyridyl ligand. Polyhedron, 114, 133-137.