10.1021/ja412822u.s001
Michael
K. Coggins
Michael
K.
Coggins
Ming-Tian Zhang
Ming-Tian
Zhang
Aaron K. Vannucci
Aaron K.
Vannucci
Christopher J. Dares
Christopher J.
Dares
Thomas J. Meyer
Thomas J.
Meyer
Electrocatalytic
Water Oxidation by a Monomeric Amidate-Ligated
Fe(III)–Aqua Complex
American Chemical Society
2014
electrochemical kinetics study
surface area electrode
Electrocatalytic Water Oxidation
Ir water oxidation catalysts
water oxidation
15 h electrolysis period
Sustained water oxidation catalysis
2014-04-16 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Electrocatalytic_Water_Oxidation_by_a_Monomeric_Amidate_Ligated_Fe_III_Aqua_Complex/2305414
The six-coordinate Fe<sup>III</sup>-aqua complex [Fe<sup>III</sup>(dpaq)(H<sub>2</sub>O)]<sup>2+</sup> (<b>1</b>, dpaq is 2-[bis(pyridine-2-ylmethyl)]amino-<i>N</i>-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 Fe<sup>V</sup>(O)<sup>2+</sup> followed by a reaction first order
in catalyst and added water, respectively, with <i>k</i><sub>o</sub> = 0.035(4) M<sup>–1</sup> s<sup>–1</sup> 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<sub>2</sub> through at least
29 turnovers over an 15 h electrolysis period with a 45% Faradaic
yield and no observable decomposition of the catalyst.