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A Ternary Zn-Al-Ir Hydrotalcite-Like Compound Exhibiting High Efficiency and Recyclability as a Water Oxidation
Lucia Fagiolari1, Antonio Scafuri2, Ferdinando Costantino1
1Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, Via Elce di Sotto 8, 06123, Perugia, Italy.
Abstract:
Herein it is shown that hydrotalcite-like compounds (HTlcs), doped with a suitably reactive metal, can efficiently act as water oxidation catalysts. As a case study, a ternary HTlc of formula [Zn0.667 Al0.306 Ir0.027 (OH)2 ]Cl0.333 ⋅0.6 H2 O, in which iridium is homogeneously distributed into the octahedral sites of brucite-type sheets, was prepared and tested as a heterogeneous water oxidation catalyst, using NaIO4 as a sacrificial oxidant. This HTlc showed excellent performance in terms of turnover frequency (up to 113 min-1 ), turnover number (>11 900), stability and recyclability.
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