TY  - JOUR
A1  - Schindler, Dorothee
A1  - Gil‐Sepulcre, Marcos
A1  - Lindner, Joachim O.
A1  - Stepanenko, Vladimir
A1  - Moonshiram, Dooshaye
A1  - Llobet, Antoni
A1  - Würthner, Frank
T1  - Efficient Electrochemical Water Oxidation by a Trinuclear Ru(bda) Macrocycle Immobilized on Multi‐Walled Carbon Nanotube Electrodes
T2  - Advanced Energy Materials
N2  - Catalytic water splitting is a viable process for the generation of renewable fuels. Here it is reported for the first time that a trinuclear supramolecular Ru(bda) (bda: 2,2′‐bipyridine‐6,6′‐dicarboxylate) catalyst, anchored on multi‐walled carbon nanotubes and subsequently immobilized on glassy carbon electrodes, shows outstanding performance in heterogeneous water oxidation. Activation of the catalyst on anodes by repetitive cyclic voltammetry (CV) scans results in a catalytic current density of 186 mA cm\(^{−2}\) at a potential of 1.45 V versus NHE. The activated catalyst performs water oxidation at an onset overpotential of 330 mV. The remarkably high stability of the hybrid anode is demonstrated by X‐ray absorption spectroscopy and electrochemically, revealing the absence of any degradation after 1.8 million turnovers. Foot of the wave analysis of CV data of activated electrodes with different concentrations of catalyst indicates a monomolecular water nucleophilic attack mechanism with an apparent rate constant of TOFmax (turnover frequency) of 3200 s\(^{−1}\).
KW  - electrocatalysis
KW  - heterogeneous catalysis
KW  - renewable fuels
KW  - ruthenium bda complexes
KW  - water splitting
Y1  - 2020
UR  - https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/21838
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-218381
VL  - 10
IS  - 43
ER  -