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New Powerful and Oxidatively Rugged Dinuclear Ru Water Oxidation Catalyst: Control of Mechanistic Pathways by Tailored Ligand Design

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journal contribution
posted on 08.01.2014, 00:00 by Sven Neudeck, Somnath Maji, Isidoro López, Steffen Meyer, Franc Meyer, Antoni Llobet
A new powerful and oxidatively rugged pyrazolate-based water oxidation catalyst of formula {[RuII(py-SO3)2(H2O)]2(μ-Mebbp)}, 1(H2O)2, has been prepared and thoroughly characterized spectroscopically and electrochemically. This new catalyst has been conceived based on a specific ligand tailoring design, so that its performance has been systematically improved. It was also demonstrated how subtle ligand modifications cause a change in the O–O bond formation mechanism, thus revealing the close activation energy barriers associated with each pathway.