Iridium-based double perovskites for efficient water oxidation in acid media

Iridium-based double perovskites for efficient water oxidation in acid media

Diaz-Morales, Oscar (Universiteit Leiden)
Raaijman, Stefan (Universiteit Leiden)
Kortlever, Ruud (Universiteit Leiden)
Kooyman, P.J. (TU Delft ChemE/Catalysis Engineering; University of Cape Town)
Wezendonk, T.A. (TU Delft ChemE/Catalysis Engineering)
Gascon, Jorge (TU Delft ChemE/Catalysis Engineering)
Fu, W. (Universiteit Leiden)
Koper, M.T.M. (Universiteit Leiden)

2016-08-08

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.

http://resolver.tudelft.nl/uuid:aa157f43-2099-4e25-bf2f-e62d6ba5db25

https://doi.org/10.1038/ncomms12363

2041-1723

Nature Communications, 7

Institutional Repository

journal article

© 2016 Oscar Diaz-Morales, Stefan Raaijman, Ruud Kortlever, P.J. Kooyman, T.A. Wezendonk, Jorge Gascon, W. Fu, M.T.M. Koper