1. A Million Turnover Molecular Anode for Catalytic Water Oxidation.
- Author
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Creus, Jordi, Matheu, Roc, Peñafiel, Itziar, Moonshiram, Dooshaye, Blondeau, Pascal, Benet‐Buchholz, Jordi, García‐Antón, Jordi, Sala, Xavier, Godard, Cyril, and Llobet, Antoni
- Subjects
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RUTHENIUM catalysts , *ANODES , *PYRIDINE , *CARBON nanotubes , *MULTIWALLED carbon nanotubes , *MOLECULAR structure - Abstract
Molecular ruthenium-based water oxidation catalyst precursors of general formula [Ru(tda)(Li)2] (tda2− is [2,2′:6′,2′′-terpyridine]-6,6′′-dicarboxylato; L1=4-(pyren-1-yl)- N-(pyridin-4-ylmethyl)butanamide, 1 b; L2=4-(pyren-1-yl)pyridine), 1 c), have been prepared and thoroughly characterized. Both complexes contain a pyrene group allowing ready and efficiently anchoring via π interactions on multi-walled carbon nanotubes (MWCNT). These hybrid solid state materials are exceptionally stable molecular water-oxidation anodes capable of carrying out more than a million turnover numbers (TNs) at pH 7 with an Eapp=1.45 V vs. NHE without any sign of degradation. XAS spectroscopy analysis before, during, and after catalysis together with electrochemical techniques allow their unprecedented oxidative ruggedness to be monitored and verified. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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