We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Undoped Layered Perovskite Oxynitride Li<sub>2</sub>LaTa<sub>2</sub>O<sub>6</sub>N for Photocatalytic CO<sub>2</sub> Reduction with Visible Light.
- Authors
Oshima, Takayoshi; Ichibha, Tom; Qin, Ken Sinkou; Muraoka, Kanemichi; Vequizo, Junie Jhon M.; Hibino, Keisuke; Kuriki, Ryo; Yamashita, Shunsuke; Hongo, Kenta; Uchiyama, Tomoki; Fujii, Kotaro; Lu, Daling; Maezono, Ryo; Yamakata, Akira; Kato, Hideki; Kimoto, Koji; Yashima, Masatomo; Uchimoto, Yoshiharu; Kakihana, Masato; Ishitani, Osamu
- Abstract
Abstract: 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.
- Subjects
PHOTOCATALYSTS; PHOTOCATALYSIS; SPECTRUM analysis; PHOTOCATALYTIC oxidation; AMMONOLYSIS
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 27, p8286
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201803931