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Instruments / Technical Area	Publication Details	Published	Actions
B07-B-Versatile Soft X-ray beamline: High Throughput	Enhanced stability of SrRuO3 mixed oxide via monovalent doping in Sr1-xKxRuO3 for the oxygen evolution reaction Isabel Rodríguez-García , Dmitry Galyamin , Laura Pascual , Pilar Ferrer , Miguel A. Peña , David Grinter , Georg Held , Mohamed Abdel Salam , Mohamed Mokhtar , Katabathini Narasimharao , Maria Retuerto , Sergio Rojas Journal Of Power Sources 521 DOI: 10.1016/j.jpowsour.2021.230950 Diamond Proposal Number(s): [28150] Open Access Show Abstract ▼ Abstract: Ru mixed oxides are the most active catalysts for the oxygen evolution reaction (OER) in acid electrolyte. However, their stability is seriously compromised during the reaction. In this work we show that it is possible to enhance both OER activity and durability of SrRuO3 mixed oxide by the partial doping with K+ in Sr2+ sites. Sr1-xKxRuO3 perovskites (x = 0.00, 0.05, 0.10 and 0.20) have been synthesized by wet chemistry. The partial doping with K+ cations led to oxides with Ru atoms in a higher oxidation state. In addition, K-doping resulted in perovskites with slightly higher symmetry. The performance of the K-doped perovskites for the OER was assessed in acid electrolyte. Clearly, the K-doped materials, especially Sr0.80K0.20RuO3, display higher activity (lower E10) and significantly higher durability than the undoped sample SrRuO3. The results indicate that chemical modifications on Ru perovskites can be a suitable strategy to improve the stability of Ru phases during the OER.	Feb 2022

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B07-B-Versatile Soft X-ray beamline: High Throughput

Enhanced stability of SrRuO3 mixed oxide via monovalent doping in Sr1-xKxRuO3 for the oxygen evolution reaction