Evaluation of iron-based electrocatalysts for water oxidation - an on-line mass spectrometry approach.

Using on-line mass spectrometry in combination with classical electroanalytical techniques makes it possible to reliably determine onset potentials and to distinguish between competing reactions such as oxygen evolution and carbon dioxide formation. Using these on-line MS methods, catalytic water oxidation activity was demonstrated for cis-[Fe(cyclam)Cl2]Cl (1) and [Fe(cyclamacetate)Cl] (2).