Photolytic water oxidation catalyzed by a molecular carbene iridium complex
|Title:||Photolytic water oxidation catalyzed by a molecular carbene iridium complex||Authors:||Petronilho, Ana
Woods, James A.
MacElroy, J. M. Don
|Permanent link:||http://hdl.handle.net/10197/6606||Date:||10-Oct-2012||Online since:||2015-06-16T14:03:22Z||Abstract:||The complex IrCl2(Cp*)(trz) (trz = triazolylidene), 2, was prepared from readily available 1,3-dimethyl-4-phenyl-1,2,3-triazolium salt. Under basic conditions, the C-bound phenyl group readily cyclometalates, while under acidic conditions, cyclometalation is reversed. The sensitivity of the Caryl–Ir bond but not the Ctrz–Ir bond towards acidolysis provided a basis for using 2 as a catalyst in CeIV-mediated water oxidation. The catalytic activity is characterized by a robust catalytic cycle, affording excellent turnover numbers (TON > 20 000). Under cerium-free conditions and in the presence of hematite as a photoelectrode, light-induced activity was observed. The photoelectrochemical reaction is strongly pH-dependent, which requires pH adjustments when running multiple cycle experiments to regenerate the catalytic activity. Analogous chelating complexes display better stability and higher catalytic activity than the monodentate complex 2.||Funding Details:||European Research Council
Science Foundation Ireland
|Type of material:||Journal Article||Publisher:||Royal Society of Chemistry||Journal:||Dalton Transactions||Volume:||41||Issue:||42||Start page:||13074||End page:||13080||Copyright (published version):||2012 The Royal Society of Chemistry||Keywords:||Catalysis; Water oxidation; Sustainable energy sources||DOI:||10.1039/C2DT30403A||Language:||en||Status of Item:||Peer reviewed|
|Appears in Collections:||Solar Energy Conversion (SEC) Cluster Research Collection|
Chemical and Bioprocess Engineering Research Collection
Chemistry Research Collection
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