Electrocatalytic
Oxygen Evolution with an Immobilized
TAML Activator
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Abstract
Iron
complexes of tetra-amido macrocyclic ligands are important
members of the suite of oxidation catalysts known as TAML activators.
TAML activators are known to be fast homogeneous water oxidation (WO)
catalysts, producing oxygen in the presence of chemical oxidants,
e.g., ceric ammonium nitrate. These homogeneous systems exhibited
low turnover numbers (TONs). Here we demonstrate immobilization on
glassy carbon and carbon paper in an ink composed of the prototype
TAML activator, carbon black, and Nafion and the subsequent use of
this composition in heterogeneous electrocatalytic WO. The immobilized
TAML system is shown to readily produce O<sub>2</sub> with much higher
TONs than the homogeneous predecessors