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Na-doped ruthenium perovskite electrocatalysts with improved oxygen evolution activity and durability in acidic media
Open accessAbstract
The design of active and durable catalysts for the H 2 O/O 2 interconversion is one of the major challenges of electrocatalysis for renewable energy. The oxygen evolution reaction (OER) is catalyzed by SrRuO 3 with low potentials (ca. 1.35 V RHE), but the catalyst’s durability is insufficient. Here we show that Na doping enhances both activity and durability in acid media. DFT reveals that whereas SrRuO 3 binds reaction intermediates too strongly, Na doping of ~0.125 leads to nearly optimal OER activity. Na doping increases the oxidation state of Ru, thereby displacing positively O p-band and Ru d-band centers, weakening Ru-adsorbate bonds. The enhanced durability of Na-doped perovskites is concomitant with the stabilization of Ru centers with slightly higher oxidation states, higher dissolution potentials, lower surface energy and less distorted RuO 6 octahedra. These results illustrate how high OER activity and durability can be simultaneously engineered by chemical doping of perovskites.
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Metadata
- Authors
- Retuerto, M., Pascual, L., Calle-Vallejo, F., Ferrer, P., Gianolio, D., Pereira, A. G., García, Á., Torrero, J., Fernández-Díaz, M. T., Bencok, P., Peña, M. A., Fierro, J. L. G., & Rojas, S.
- Venue
- Nature Communications
- Published
- 2019-05-03
- Volume
- 10
- Issue
- 1
- Pages
- 2041-2041
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W2943276854
- Cited by
- 357
- References
- 56
- FWCI
- 7.78
- Type
- journal article
- Language
- en
- Open access
- gold
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- Retuerto, M., Pascual, L., Calle-Vallejo, F., Ferrer, P., Gianolio, D., Pereira, A. G., García, Á., Torrero, J., Fernández-Díaz, M. T., Bencok, P., Peña, M. A., Fierro, J. L. G., & Rojas, S. (2019). Na-doped ruthenium perovskite electrocatalysts with improved oxygen evolution activity and durability in acidic media. Nature Communications. https://doi.org/10.1038/s41467-019-09791-w
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