Undoped Layered Perovskite Oxynitride Li(2) LaTa(2) O(6) N for Photocatalytic CO(2) Reduction with Visible Light.
Undoped Layered Perovskite Oxynitride Li(2) LaTa(2) O(6) N for Photocatalytic CO(2) Reduction with Visible Light.
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DOI：
10.1002/anie.201803931
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发表时间：
2018-07-02
期刊：
影响因子：
--
通讯作者：
Maeda K
中科院分区：
文献类型：
--
作者：
Oshima T;Ichibha T;Qin KS;Muraoka K;Vequizo JJM;Hibino K;Kuriki R;Yamashita S;Hongo K;Uchiyama T;Fujii K;Lu D;Maezono R;Yamakata A;Kato H;Kimoto K;Yashima M;Uchimoto Y;Kakihana M;Ishitani O;Kageyama H;Maeda K
氮氧化物是一种很有前途的可见光响应光催化剂，但其结构几乎局限于三维（3D）结构，如钙钛矿。采用热氨解法，成功制备了具有层状钙钛矿结构的纯相Li2LaTa2O6N。Li2LaTa2O6N表现出高结晶度和高达500 nm的可见光吸收。与众所周知的3D氧氮化钙钛矿不同，由双核RuII配合物支撑的Li2LaTa2O6N能够在可见光（λ>400 nm）下稳定而选择性地将CO2转化为甲酸盐。瞬态吸收光谱表明，与三维氮氧化物相比，Li2LaTa2O6N具有较低密度的中隙态（作为光生电子/空穴对的复合中心），但具有较高密度的反应电子，这是该层状氮氧化物具有较高光催化性能的原因。
Oxynitrides are promising visible‐light‐responsive photocatalysts, but their structures are almost confined with three‐dimensional (3D) structures such as perovskites. A phase‐pure Li2LaTa2O6N with a layered perovskite structure was successfully prepared by thermal ammonolysis of a lithium‐rich oxide precursor. Li2LaTa2O6N exhibited high crystallinity and visible‐light absorption up to 500 nm. As opposed to well‐known 3D oxynitride perovskites, Li2LaTa2O6N supported by a binuclear RuII complex was capable of stably and selectively converting CO2 into formate under visible light (λ>400 nm). Transient absorption spectroscopy indicated that, as compared to 3D oxynitrides, Li2LaTa2O6N possesses a lower density of mid‐gap states that work as recombination centers of photogenerated electron/hole pairs, but a higher density of reactive electrons, which is responsible for the higher photocatalytic performance of this layered oxynitride.
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影响因子：
6.7
作者：
SCAIFE, DE
通讯作者：
SCAIFE, DE
影响因子：
3.3
作者：
Schottenfeld, JA;Benesi, AJ;Mallouk, TE
通讯作者：
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影响因子：
8.6
作者：
Clarke, SJ;Hardstone, KA;Rosseinsky, MJ
通讯作者：
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作者：
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通讯作者：
Poeppelmeier KR
影响因子：
0.5
作者：
Kaga, Motoaki;Kurachi, Hirokazu;Fukuda, Koichiro
通讯作者：
Fukuda, Koichiro