Iridium complexes for electrocatalysis

Sheehan, Stafford Wheeler; Hintermair, Ulrich; Thomsen, Julianne M; Brudvig, Gary W; Crabtree, Robert H

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DOE OSTI · 1400232

Iridium complexes for electrocatalysis

Sheehan, Stafford Wheeler·Hintermair, Ulrich·Thomsen, Julianne M·Brudvig, Gary W·Crabtree, Robert H

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Abstract

Solution-phase (e.g., homogeneous) or surface-immobilized (e.g., heterogeneous) electrode-driven oxidation catalysts based on iridium coordination compounds which self-assemble upon chemical or electrochemical oxidation of suitable precursors and methods of making and using thereof are. Iridium species such as {[Ir(LX).sub.x(H.sub.2O).sub.y(.mu.-O)].sub.z.sup.m+}.sub.n wherein x, y, m are integers from 0-4, z and n from 1-4 and LX is an oxidation-resistant chelate ligand or ligands, such as such as 2(2-pyridyl)-2-propanolate, form upon oxidation of various molecular iridium complexes, for instance [Cp*Ir(LX)OH] or [(cod)Ir(LX)] (Cp*=pentamethylcyclopentadienyl, cod=cis-cis,1,5-cyclooctadiene) when exposed to oxidative conditions, such as sodium periodate (NaIO.sub.4) in aqueous solution at ambient conditions.

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Sheehan, Stafford Wheeler, Hintermair, Ulrich, Thomsen, Julianne M, Brudvig, Gary W, Crabtree, Robert H. 2017-10-17. Iridium complexes for electrocatalysis. https://www.osti.gov/biblio/1400232

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