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Chen, Yubo; Li, Haiyan; Wang, Jingxian; Du, Yonghua; Xi, Shibo; Sun, Yuanmiao; Sherburne, Matthew; Ager, 3rd, Joel W; Fisher, Adrian C; Xu, Zhichuan J
Nature communications, 02/2019, Letnik: 10, Številka: 1Journal Article
Exploring robust catalysts for water oxidation in acidic electrolyte is challenging due to the limited material choice. Iridium (Ir) is the only active element with a high resistance to the acid corrosion during water electrolysis. However, Ir is rare, and its large-scale application could only be possible if the intrinsic activity of Ir could be greatly enhanced. Here, a pseudo-cubic SrCo Ir O perovskite, containing corner-shared IrO6 octahedrons, is designed. The Ir in the SrCo Ir O catalyst shows an extremely high intrinsic activity as reflected from its high turnover frequency, which is more than two orders of magnitude higher than that of IrO . During the electrochemical cycling, a surface reconstruction, with Sr and Co leaching, over SrCo Ir O occurs. Such reconstructed surface region, likely contains a high amount of structural domains with corner-shared and under-coordinated IrO octahedrons, is responsible for the observed high activity.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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