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- W3009051217 abstract "Abstract Undoped layered oxynitrides have not been considered as promising H 2 ‐evolution photocatalysts because of the low chemical stability of oxynitrides in aqueous solution. Here, we demonstrate the synthesis of a new layered perovskite oxynitride, K 2 LaTa 2 O 6 N, as an exceptional example of a water‐tolerant photocatalyst for H 2 evolution under visible light. The material underwent in‐situ H + /K + exchange in aqueous solution while keeping its visible‐light‐absorption capability. Protonated K 2 LaTa 2 O 6 N, modified with an Ir cocatalyst, exhibited excellent catalytic activity toward H 2 evolution in the presence of I − as an electron donor and under visible light; the activity was six times higher than Pt/ZrO 2 /TaON, one of the best‐performing oxynitride photocatalysts for H 2 evolution. Overall water splitting was also achieved using the Ir‐loaded, protonated K 2 LaTa 2 O 6 N in combination with Cs‐modified Pt/WO 3 as an O 2 evolution photocatalyst in the presence of an I 3 − /I − shuttle redox couple." @default.
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- W3009051217 date "2020-04-02" @default.
- W3009051217 modified "2023-10-16" @default.
- W3009051217 title "Two‐Dimensional Perovskite Oxynitride K<sub>2</sub>LaTa<sub>2</sub>O<sub>6</sub>N with an H<sup>+</sup>/K<sup>+</sup> Exchangeability in Aqueous Solution Forming a Stable Photocatalyst for Visible‐Light H<sub>2</sub> Evolution" @default.
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- W3009051217 doi "https://doi.org/10.1002/anie.202002534" @default.
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