Electrocatalytic water oxidation by a monomeric amidate-ligated Fe(III)-aqua complex Article

Coggins, MK, Zhang, MT, Vannucci, AK et al. (2014). Electrocatalytic water oxidation by a monomeric amidate-ligated Fe(III)-aqua complex . JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 136(15), 5531-5534. 10.1021/ja412822u

cited authors

  • Coggins, MK; Zhang, MT; Vannucci, AK; Dares, CJ; Meyer, TJ

authors

abstract

  • The six-coordinate FeIII-aqua complex [FeIII(dpaq) (H2O)]2+ (1, dpaq is 2-[bis(pyridine-2-ylmethyl)]amino-N- quinolin-8-yl-acetamido) is an electrocatalyst for water oxidation in propylene carbonate-water mixtures. An electrochemical kinetics study has revealed that water oxidation occurs by oxidation to FeV(O)2+ followed by a reaction first order in catalyst and added water, respectively, with k o = 0.035(4) M-1 s-1 by the single-site mechanism found previously for Ru and Ir water oxidation catalysts. Sustained water oxidation catalysis occurs at a high surface area electrode to give O 2 through at least 29 turnovers over an 15 h electrolysis period with a 45% Faradaic yield and no observable decomposition of the catalyst. © 2014 American Chemical Society.

publication date

  • April 16, 2014

published in

Digital Object Identifier (DOI)

start page

  • 5531

end page

  • 5534

volume

  • 136

issue

  • 15