title: Iridium-based double perovskites for efficient water oxidation in acid media.
abstract: The development of active, cost-effective and stable oxygen-evolving catalysts is one of the major challenges for solar-to-fuel conversion towards sustainable energy generation. Iridium oxide exhibits the best available compromise between catalytic activity and stability in acid media, but it is prohibitively expensive for large-scale applications. Therefore, preparing oxygen-evolving catalysts with lower amounts of the scarce but active and stable iridium is an attractive avenue to overcome this economical constraint. Here we report on a class of oxygen-evolving catalysts based on iridium double perovskites which contain 32 wt% less iridium than IrO2 and yet exhibit a more than threefold higher activity in acid media. According to recently suggested benchmarking criteria, the iridium double perovskites are the most active catalysts for oxygen evolution in acid media reported until now, to the best of our knowledge, and exhibit similar stability to IrO2.
authors: Leiden Institute of Chemistry, Leiden University, PO Box 9502, Leiden 2300 RA, The Netherlands.
authors: Oscar
authors: 0000-0003-1221-0809
authors: O
authors: Diaz-Morales
authors: Leiden Institute of Chemistry, Leiden University, PO Box 9502, Leiden 2300 RA, The Netherlands.
authors: Stefan
authors: S
authors: Raaijman
authors: Leiden Institute of Chemistry, Leiden University, PO Box 9502, Leiden 2300 RA, The Netherlands.
authors: Ruud
authors: R
authors: Kortlever
authors: ChemE, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, Delft 2628 BL, The Netherlands.|Department of Chemical Engineering, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa.
authors: Patricia J
authors: PJ
authors: Kooyman
authors: ChemE, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, Delft 2628 BL, The Netherlands.
authors: Tim
authors: T
authors: Wezendonk
authors: ChemE, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, Delft 2628 BL, The Netherlands.
authors: Jorge
authors: 0000-0001-7558-7123
authors: J
authors: Gascon
authors: Leiden Institute of Chemistry, Leiden University, PO Box 9502, Leiden 2300 RA, The Netherlands.
authors: W T
authors: WT
authors: Fu
authors: Leiden Institute of Chemistry, Leiden University, PO Box 9502, Leiden 2300 RA, The Netherlands.
authors: Marc T M
authors: MT
authors: Koper